The session General Contributions on Earthquakes, Earth Structure, Seismology features a wide range of presentations on recent earthquakes and earthquake sequences of local, regional, and global significance, as well as recent advances in characterization of Earth structure using a variety of methods.
We will have a special section this year about challenges associated to monitoring seismology in volcanic islands.

Assessing the uncertainty in observations and in scientific results is a fundamental part of the scientific process. In principle uncertainty estimates allow data of different types to be weighted appropriately in joint interpretations, allow existing results to be tested against new data, allow potential implications of the results to be tested for relative significance, allow differences between best-fit model estimates to be explained, and allow quantitative risk assessments to be performed. In practice, uncertainty estimation can be theoretically challenging, computationally expensive, model-dependent and subject to expert biases. This session will explore the value or otherwise of the significant effort that is required to assess uncertainty in practice.

We welcome contributions from the solid Earth sciences for and against the calculation and use of uncertainties. We welcome those that extend the use of subsurface model uncertainties for important purposes, and which demonstrate the value of uncertainties. We also welcome contributions which argue against the value of uncertainties, perhaps particularly given the cost of their assessment. Uses of uncertainties may include value of information (VOI) calculations, the use of models for forecasting new qualities that can be tested, the reconciliation of historically diverse models of the same structures or phenomena, or any other result that fits the overall brief of demonstrating value. Arguments against the value of uncertainty may include anything from pragmatic uses of uncertainty estimates that have demonstrably failed to be useful, to philosophical issues of how it is possible even to define uncertainty in model-based contexts. All pertinent contributions are welcome, as is a lively discussion!

The Eastern Mediterranean is an actively deforming region where three major tectonic plates interact: the African, the Arabian and the Eurasian plates. The Cenozoic geodynamic framework of the Eastern Mediterranean region consists of subduction, collision, strike-slip kinematics, extrusion of crustal blocks and slab deformation.

This session focuses on three aspects of the Eastern Mediterranean geodynamics:
(1) Which geodynamic mechanisms define the key active structures and how do they operate?
(2) How is surface deformation being accommodated over a range of temporal and spatial scales? How individual earthquakes accrue on faults to account for their long-term kinematics? Which is the impact of deep-seated processes on surface deformation?
(3) How did the geodynamic evolution through the Cenozoic lead to present day tectonic deformation?

We welcome contributions from a wide range of disciplines including, but not limited to, neotectonics, seismology, tectonic geodesy (e.g. GNSS, InSAR), paleoseismology, tectonic geomorphology, remote sensing, structural geology, and geodynamic modeling.

We strongly encourage the contribution of early career researchers.

We invite contributions based on geological, tectonic, geophysical and geodynamic studies of the Tethyan Belt, Central Asia, and the Circum Pacific margins. We particularly invite interdisciplinary studies, which integrate observations and interpretations based on a variety of methods. This session will include a suite of studies of these regions with the aim of providing a comprehensive overview of their formation and evolution, influence of the tectonic features on climate, biodiversity, human habitat, and topographic change.
The Tethyan Belt is the most prominent collisional zone on Earth, covering the vast area between far eastern Asia and Europe. The geological-tectonic evolution of the belt has led to significant along-strike heterogeneity in its various regions, including the SE-Asian subduction-collision system, the Tibetan-Himalayan region, the Iranian Plateau, Anatolia, and the Alpine orogen. The Tethyan Belt is the result of subduction of the Tethyan Oceans, including significant terrane amalgamation, and collisional tectonics along the whole belt. The belt is today strongly affected by the ongoing collision of Eurasia with the African, Arabian and Indian plates and the large-scale geometry of the Cenozoic mountain ranges is often determined by inherited features. The long formation history and the variability of tectonic characteristics and deep structure of the region make it a natural laboratory for understanding the accretion processes that have shaped the Earth through its history and have led to the formation of vast resources in the crust.
The circum-Pacific domain has been undergoing multiple re-orientations in subduction and given rise to basin-mountain systems in both the eastern and western Pacific continental margins since the late Mesozoic. We welcome contributions on (1) the formation/origin and evolution of lithosphere architecture, (2) spatial-temporal evolution of Earth’s surface topography, (3) evolution of basin-mountain systems, and (4) 4-D geodynamic models of eastern and western Pacific continental margins.

On February 6, 2023, two powerful earthquakes of magnitude 7.8 and 7.7 rocked south-central Türkiye and northern Syria, strongly affecting the regions around Gaziantep, Kahramanmaraş, Malatya, and Hatay. The epicenter of the first mainshock (37.288 N, 37.043 E, 8.6 km depth, origin time 01:17 AM UTC) is located close to the East Anatolian Fault (EAF). The second large earthquake (38.089°N, 37.239°E, 7.0 km depth, origin time 10:24 AM UTC) occurred only 9 hrs later, about 90 km north of the first mainshock on the east-west trending Sürgü Fault, at a time when the local population had already begun to rescue survivors and their belongings. The aftershock sequences delineate fault lengths of ~360 km and ~180 km for the M 7.8 and M 7.7 ruptures, respectively, rendering these earthquakes among the longest continental strike-slip earthquakes ever recorded. A basin-wide tsunami alert was issued by the NEAMTWS Tsunami Service Providers, and a small tsunami was generated which was measured in the Eastern Mediterranean Sea.

This session solicits contributions from all disciplines of Earth sciences, engineering, social sciences, disaster management, and policy making to glean a first-order interdisciplinary understanding of the causes and consequences of this devastating double earthquake event. We invite presentations that address the tectonic context of the EAF and large historical earthquakes in the region, measurements and inferences from earthquake geology and space imagery, studies on the coseismic rupture process of the two events and their physical connection, assessment of ground-shaking levels and strong-motion properties, site effects, damage and risk assessment, as well as tsunami forecasting and warning, and the societal implications of these devastating earthquakes.

Notes:
1. The Abstract Processing Charge (APC) for Turkish/Syrian scientists will be waived.
2. A regular APC rate of 50EUR will apply for all other scientists who are to submit an abstract for this late-breaking session.
3. The deadline for submitting an abstract to this session is 19.02.2023.
4. Please contact Philippe Jousset, sm@egu.eu, if it happens you already have submitted an abstract and yet want to submit an additional abstract to this session.

Fibre optic based techniques allow probing highly precise direct point and distributed sensing of the full ground motion wave-field including translation, rotation and strain, and environmental parameters such as temperature and even chemicals at a scale and to an extent previously unattainable with conventional geophysical methods. Considerable improvements in optical and atom interferometry enable new concepts for inertial rotation, translational displacement and acceleration sensing. Laser reflectometry using both fit-to-purpose and commercial fibre optic cables have successfully detected a variety of signals including microseism, local and teleseismic earthquakes, volcanic events, ocean dynamics, etc. Significant breakthrough in the use of fibre optic sensing techniques came from the new ability to interrogate telecommunication cables at high precision both on land and at sea, as well as in boreholes and at the surface. Applications of the resulting new type of data are manifold: they include seismic source and wave-field characterization with single point observations in harsh environments like active volcanoes, the ocean bottom, the correction of tilt effects, e.g. for high performance seismic isolation facilities, as well as seismic ambient noise interferometry and seismic building monitoring.

We welcome contributions on developments in instrumental and theoretical advances, applications and processing with fibre optic point and/or distributed multi-sensing techniques, light polarization and transmission analyses, using standard telecommunication and/or engineered fibre cables. We seek studies on theoretical, observation and advanced processing in fields, including seismology, volcanology, glaciology, geodesy, geophysics, natural hazards, oceanography, urban environment, geothermal applications, laboratory studies, large-scale field tests, planetary exploration, gravitational wave detection, fundamental physics. We encourage contributions on data analysis techniques, machine learning, data management, instrumental performance and comparison as well as new experimental, field, laboratory, modeling studies in fibre optic sensing studies.

We are happy to announce Prof. Martin Landrø, Prof. Kuo-Fong Ma and Dr. David Sollberger as invited speakers!

The oceans cover about 71% of the Earth's surface, yet our current picture of the structure and dynamics of the oceanic crust and mantle is mainly based on seismic data recorded in islands or in the continents.

Detailed seismic observations of the sub-oceanic Earth’s interior require the use of ocean-bottom seismometers (OBS), but large OBS deployments - both in numbers of instruments and area covered - remain a major endeavour due to technical, logistical and financial challenges.

A zoo of OBS arrays and other passive ocean-bottom geophysics (e.g., geodesy, magnetotelluric) has been deployed in the last two decades, which led to fascinating new discoveries about the crust and mantle beneath the seafloor in many regions worldwide. Despite great technological advances and improved data processing procedures, some challenges persist.

OBS deployments and recovery are more demanding than anticipated by (first-time) PIs and consist of many challenges obscured by a lack of communication between scientists. Recurring issues include missing or erroneous response files or the challenge of systematically exploring the wealth of information recorded by the OBS datasets. Most processed data sets are not released for several years (if at all). This stagnates the exploration of OBS datasets in the community and reduces its usage to just a few research groups.

We invite contributions from the global ocean-bottom geophysics community to share knowledge, experience, lessons learned and scientific achievements from OBS experiments. We welcome reflections on all aspects, from early stage planning, different kinds of OBS or amphibian devices, experiment design, deployment and recovery tactics, pre- and post-data processing and analysis (e.g., software), to publishing data reports and final scientific outputs (e.g., tomography, receiver functions, ambient noise studies, earthquake source analysis, etc). We also encourage contributions beyond seismology, such as from seafloor environmental sensors (e.g., using submarine cables), magnetotellurics, geodesy, ocean acoustics and marine mammals studies.

We welcome contributions from all aspects of modern seismic network deployment, operation, management, and delivery of downstream waveform data products, at local, regional and global level: best practice for seismic data management (site selection, equipment testing and installation, planning and telemetry, policies for redundancy in data acquisition, processing and archiving, data and metadata QC, data management and dissemination policies); integration of new data types and communities (DAS systems, large-N instrumentation, OBS, GNSS, gravity, infrasound instruments, rotational sensors, etc.); development, testing, comparison of emerging strategies (e.g. machine learning) and software tools for earthquake monitoring including real-time applications (e.g., source imaging, earthquake early warning, rapid shaking assessment); delivery of technical and scientific seismological and multidisciplinary data products; facilitating the integration of recorded seismological data in computational workflows and digital twins. Promoted by EGU SM-SII and ORFEUS, this session facilitates seismological data discovery and promotes open and FAIR data policies.
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Four decades of globally distributed and openly available very broadband seismic recordings have enabled significant advances in characterizing earthquake sources, mapping the deep structure of the Earth, and understanding the behavior of the atmosphere, hydrosphere, and cryosphere. Long-term deployment has illuminated time-dependent processes and allowed subtle signals to be enhanced and utilized through stacking. Real-time telemetry has revolutionized the monitoring capability for large and potentially destructive earthquakes. Central to these activities have been the international partnerships, infrastructure investments, and technological developments that have facilitated, grown, and maintained the availability of low-noise and high-fidelity seismic recordings worldwide. This session focuses on impactful current science being done with globally distributed real-time networks, to understand how technological developments can optimize existing resources, to share ideas for expanding global networks (e.g., Global Seismographic Network, GeoScope) to include other geophysical and environmental observations, to recognize how increased partnerships and collaboration can further grow high-quality station coverage, and to reflect on the common challenges to operating and sustaining these scientific resources.

Research in Earth and environmental sciences benefits from interdisciplinary approaches (e.g. to understand and model multi-scale processes). The study of complex environmental processes may involve diverse collections of samples and associated field or laboratory measurements, sensors, remote sensing data, across international dimensions. Research benefits from practices that use easily-portable and reproducible tools and techniques. Best practices of sharing our data and software are now well-established and the earth science community needs to move forward with generally accepted methodologies of software and data distribution that can expand easily to include complex system and multi-domain challenges.

This session seeks innovative presentations for interdisciplinary research and applications, including but not limited to, on Earth Science data and service activities. Presentations addressing the specific societal needs, best practices, learned lessons and new challenges in data provenance, information access, visualization, and analysis, are highly encouraged, as well as presentation on the ways to adopt FAIR data principles towards sustainable solutions in Earth Science and the path to open science are . Discussion of challenges for future data services or European infrastructure are also welcome.

Need for Smart Solutions in earth, environmental and planetary sciences: Tackling data challenges and incorporating applied earth and planetary sciences into artificial intelligence (AI) models opened a new avenue for creating comprehensive methodologies and strategies to answer a wide variety of theoretical and practical questions from detecting, modelling, interpreting and predicting changes in the earth and environment’s ecosystems in response to climate change to understanding interactions among the ocean, atmosphere, and land in the climate system. Therefore, AI and Data Science (DS) in earth, environmental and planetary sciences are one of the fastest growing areas. The performance of the AI/DS models improves as it gains experience over time. Various mathematical and statistical models need to be investigated to determine the performance of AI models. Once the learning process is completed, then the model can then be used to make an assumption, classify and test data. This is achieved after gaining experience in the training process. This session aims to make available to the world community of earth, environment and planetary sciences-related professionals a collection of scientific papers on the current state of the art and recent developments of AI and DS applications in the field. This session will shed light on many recent research activities on applying AI/DS techniques into a single comprehensive document to address engineering, social, political, economic, safety, health, and technological issues of earth, environment and planetary sciences challenges and opportunities. The purpose of this session is to improve and facilitate the application of intelligent systems for the earth, environmental and planetary sciences to highlight new insight for creating comprehensive methodologies for analyzing/processing/predicting/management strategies in the fields of fundamental and applied sciences problems through the decision-making abilities of artificial intelligence and machine learning techniques.

Interferometric techniques turn seismic networks into continuous observation devices for (time-varying) Earth structure, volcanic and hydrologic processes, ocean - solid Earth interactions and many more phenomena. Increasingly, seismic interferometry is applied to signals beyond ocean microseismic noise, such as earthquake coda and anthropogenic seismic signals.

Great strides have been taken in obtaining high-resolution images of seismic velocity and other properties, in observing and quantifying the sources of various ambient noise wave types, and in inferring seismic property variations. Current challenges include the interpretation of signals from opportunistic sources, e.g. in the context of traffic noise interferometry or ambient noise body waves from localized storms; the interpretation of ambient noise amplitudes for elastic effects and anelastic attenuation; and the spatial localization of seismic property changes.

This session offers a broad space for discussing recent advances in ambient noise seismology and seismic interferometry. We invite abstracts on theoretical and numerical developments as well as novel applications. Topics may include, but are not limited to, studies of ambient seismic sources; ocean wave quantification through ambient noise; urban seismic noise; interferometric imaging; monitoring subsurface properties and quantifying the response of seismic velocity to various stresses and strains; studies of the spatial sensitivity for imaging and monitoring under various source conditions; quantification of site effects, amplification and attenuation; improvements in processing and retrieval of high-quality interferometry observations, and interdisciplinary applications of seismic interferometry.

From the real-time integration of multi-parametric observations is expected the major contribution to the development of operational t-DASH systems suitable for supporting decision makers with continuously updated seismic hazard scenarios. A very preliminary step in this direction is the identification of those parameters (seismological, chemical, physical, biological, etc.) whose space-time dynamics and/or anomalous variability can be, to some extent, associated with the complex process of preparation of major earthquakes.
This session wants then to encourage studies devoted to demonstrate the added value of the introduction of specific, observations and/or data analysis methods within the t-DASH and StEF perspectives. Therefore, studies based on long-term data analyses, including different conditions of seismic activity, are particularly encouraged. Similarly welcome will be the presentation of infrastructures devoted to maintain and further develop our present observational capabilities of earthquake related phenomena also contributing in this way to build a global multi-parametric Earthquakes Observing System (EQuOS) to complement the existing GEOSS initiative.
To this aim this session is not addressed just to seismology and natural hazards scientists but also to geologist, atmospheric sciences and electromagnetism researchers, whose collaboration is particular important for fully understand mechanisms of earthquake preparation and their possible relation with other measurable quantities. For this reason, all contributions devoted to the description of genetic models of earthquake’s precursory phenomena are equally welcome.

This session will focus on three approaches for investigating the physics of earthquakes: imaging, numerical simulations, and machine learning. We solicit abstracts on works to image rupture kinematics, simulate earthquake dynamics using numerical methods, and those using Machine Learning (ML) to improve understanding of the physics of earthquakes. We invite in particular works that aim to develop a deeper understanding of earthquake source physics by linking novel laboratory experiments to earthquake dynamics, and studies on earthquake scaling properties. We also encourage works that illuminate the physics behind and transferability to Earth of studies showing that acoustic emissions can be used to predict characteristics of laboratory earthquakes and identify precursors to labquakes. Other works show progress in imaging earthquake sources using seismic data and surface deformation measurements (e.g. GPS and InSAR) to estimate rupture properties on faults and fault systems.

We want to highlight strengths and limitations of each data set and method in the context of the source-inversion problem, accounting for uncertainties and robustness of the source models and imaging or simulation methods. Contributions are welcome that make use of modern computing paradigms and infrastructure to tackle large-scale forward simulation of earthquake process, but also inverse modeling to retrieve the rupture process with proper uncertainty quantification. We also welcome ML-based works on a broad range of issues in seismology and encourage seismic studies using data from natural faults, lab results and numerical approaches to understand earthquake physics.

Slow earthquakes are widely observed in subduction zones, where they episodically release the tectonic strain built-up in the brittle-ductile transition zone. Given their proximity to the seismogenic megathrust, a comprehensive understanding of slow earthquakes may shed light on the stress condition of the megathrust fault. With improved quantities of data and advanced technologies, the nature of slow earthquakes has been intensively investigated in a variety of tectonic environments over the past decades. This session aims to offer a broad space for discussion of the recent advances in slow earthquakes.
We seek studies ranging from lab to volcanic and tectonic scales and from diverse geological and geophysical (including but not limited to seismic and geodetic) observations to imaging and modeling. We welcome abstracts focused on earthquake detection, scaling, source, rupture process, and fluid or/and heterogeneity effects. Within the larger context of this session, we also seek abstracts illuminating the connection between slow and fast earthquakes.

During the last decades, methods have significantly improved in geophysics, geodesy, and in paleoseismology-geomorphology. Hence, on one hand the number of earthquakes with well-documented rupture process and deformation pattern has increased significantly. On the other hand, the number of studies documenting long time series of past earthquakes, including quantification of past deformation has also increased. In parallel, the modeling community working on rupture dynamics, including earthquake cycle is also making significant progresses. Thus, this session is the opportunity to bring together these different contributions to foster further collaboration between the different groups focusing all on the same objective of integrating earthquake processes into the earthquake cycle framework. In this session we welcome contributions documenting earthquake ruptures and processes, both for recent or ancient events, from seismological, geodetic, or paleoseismological perspective. Contributions documenting deformation during pre-, post-, or interseismic periods, which are highly relevant to earthquake cycle understanding, are also very welcomed. Finally, we seek for any contribution looking at the earthquake cycle from the modeling perspective, especially including approaches mixing data and modeling.

Tectonic faults accommodate plate motion through various styles of seismic and aseismic slip spanning a wide range of spatiotemporal scales. Understanding the mechanics and interplay between seismic rupture and aseismic slip is central to seismotectonics as it determines the seismic potential of faults. In particular, unraveling the underlying physics controlling these styles of deformation bears a great deal in earthquakes hazards mitigation especially in highly urbanized regions. We invite contributions from observational, experimental, geological and theoretical studies that explore the diversity and interplay among seismic and aseismic slip phenomena in various tectonic settings, including the following questions: (1) How does the nature of creeping faults change with the style of faulting, fluids, loading rate, and other factors? (2) Are different slip behaviors well separated in space, or can the same fault areas experience different failure modes? (3) Is there a systematic spatial or temporal relation between different types of slip?

It is becoming increasingly apparent that continental rifting, breakup, and ocean spreading involve complexities not easily explained by standard models, especially in oblique and transform settings. The unexpected discovery of continental material far offshore, e.g. at the Rio Grande Rise, and realisation of the importance of obliquity and time-dependence in rifting, challenge conventional tectonic models. This session aims to bring together new observations, models, and ideas to help us understand the complex factors influencing continental rifting, breakup and ocean spreading, including oblique and transform settings. Works investigating time-dependant controls on rifting mechanisms, plate kinematics, strain localisation, obliquity, plate interior deformation, inherited lithospheric structures, interaction and feedbacks of rift processes, lithospheric and mantle derived driving forces, magmatism, syn-rift sedimentation, and other controls on rifting, are therefore welcomed to this session. Contributions from any geoscience discipline, including marine geophysics, seismology, ocean drilling, geochemistry, petrology, plate kinematics, tectonics, structural geology, numerical and analogue modelling, sedimentology and geochronology etc., are sought. We particularly encourage cross-disciplinarity, the spanning of spatio-temporal scales, and thought-provoking studies that challenge conventions from any and all researchers.

Earthquake mechanics is controlled by a spectrum of processes covering a wide range of length scales, from tens of kilometres down to few nanometres. The geometry of the fault/fracture network and its physical properties control the global stress distribution and the propagation/arrest of the seismic rupture. At the same time, earthquake rupture nucleation, rupture and arrest are governed by fracture propagation and frictional processes occurring within extremely localized sub-planar slipping zones. The co-seismic rheology of the slipping zones themselves depends on deformation mechanisms and dissipative processes active at the scale of the grain or asperity. The study of such complex multiscale systems requires an interdisciplinary approach spanning from structural geology to seismology, geophysics, petrology, rupture modelling and experimental rock deformation. In this session we aim to convene contributions dealing with different aspects of earthquake mechanics at various depths and scales such as:

- the thermo-hydro-mechanical processes associated with co-seismic fault weakening based on rock deformation experiments, numerical simulations and microstructural studies of fault rocks;
- the study of natural and experimental fault rocks to investigate the nucleation mechanisms of intermediate and deep earthquakes in comparison to their shallow counterparts;
- the elastic, frictional and transport properties of fault rocks from the field (geophysical and hydrogeological data) to the laboratory scale (petrophysical and rock deformation studies);
- the internal architecture of seismogenic fault zones from field structural survey and geophysical investigations;
- the modeling of earthquake ruptures, off-fault dynamic stress fields and long-term mechanical evolution of realistic fault networks;
- the earthquake source energy budget and partitioning between fracture, friction and elastic wave radiation from seismological, theoretical and field observations.
- the interplay between fault geometry and earthquake rupture characteristics from seismological, geodetic, remote sensed or field observations;

We particularly welcome novel observations or innovative approaches to the study of earthquake faulting. Contributions from early career scientists are solicited.

This session will cover applied and theoretical aspects of
geophysical imaging, modeling and inversion using active- and
passive-source seismic measurements as well as other geophysical
techniques (e.g., gravity, magnetic, electromagnetic) to
investigate properties of the Earth’s lithosphere and asthenosphere,
and explore the processes involved. We invite contributions focused on
methodological developments, theoretical aspects, and applications.
Studies across the scales and disciplines are particularly welcome.

Among others, the session may cover the following topics:
- Active- and passive-source imaging using body- and surface-waves;
- Full waveform inversion developments and applications;
- Advancements and case studies in 2D and 3D imaging;
- DAS imaging;
- Interferometry and Marchenko imaging;
- Seismic attenuation and anisotropy;
- Developments and applications of multi-scale and multi-parameter inversion; and,
- Joint inversion of seismic and complementary geophysical data.

Geophysical imaging techniques are widely used to characterize structures and processes in the shallow subsurface. Methods include imaging using P-wave seismic but also S-wave and multi-component techniques, (complex) electrical resistivity, electromagnetic, and ground-penetrating radar methods, as well as passive monitoring based on ambient noise or electrical self-potentials. Advances in experimental design, instrumentation, data acquisition, data processing, numerical modelling, and inversion constantly push the limits of spatial and temporal resolution. Despite these advances, the interpretation of geophysical images and properties often remains ambiguous. Persistent challenges addressed in this session include optimal data acquisition strategies, (automated) data processing and error quantification, appropriate spatial and temporal regularization of model parameters, integration of non-geophysical measurements and geological realism into the imaging process, joint inversion, as well as the quantitative interpretation of tomograms through suitable petro-physical relations.

In light of these topics, we invite submissions concerning a broad spectrum of near-surface geophysical imaging methods and applications at different spatial and temporal scales. Novel developments in the combination of complementary measurement methods, machine learning, and process-monitoring applications are particularly welcome.

We invite contributions that address the present and past structure and dynamics of the Alpine orogens and the back-arc basins of the Mediterranean area, which in the last decades has been the target of broadband large-scale passive experiments. The TopoIberia-Iberarray project, carried out in the 2000s in the Iberian Peninsula, is a successful example of the scientific progress that these experiments allow. More recently, the international AlpArray mission and related projects have generated a large amount of new data, not only seismic, to test the hypothesis that mantle circulation driving plates’ re-organization during collision has both immediate and long-lasting effects on the structure, motion, earthquake distribution and landscape evolution in mountain belts. Links between Earth’s surface and mantle have been forged by integrating 3D geophysical imaging of the entire crust-mantle system, with geologic observations and modelling to provide a look both backwards and forwards in time, the 4th dimension. This integrated 4D approach, initially focused on the Alps, has been expanded to the Pannonian-Carpathian region, with the ongoing PACASE experiment. A new initiative, AdriaArray, based on the deployment of the extensive AdriaArray Seismic Network, is underway to cover the Adria plate on both sides, including the Apennines and Dinarides-Hellenides, to shed light on plate-scale deformation and orogenic processes in this dynamic part of the Alpine-Mediterranean chain. This session provides an interdisciplinary platform for highlighting the newest results and open questions of the aforementioned projects, regions and themes.

Understanding the structures and dynamics of the core of a planet is essential to constructing a global geochemical and geodynamical model, and has implication on the planet's thermal, compositional and orbital evolution.

Remote sensing of planetary interiors from space and ground based observations is entering a new era with perspectives in constraining their core structures and dynamics. Meanwhile, increasingly accurate seismic data provide unprecedented images of the Earth's deep interior. Unraveling planetary cores' structures and dynamics requires a synergy between many fields of expertise, such as mineral physics, geochemistry, seismology, fluid mechanics or geomagnetism.

This session welcomes contributions from all the aforementioned disciplines following theoretical, numerical, observational or experimental approaches.

Many regions of the Earth, from crust to core, exhibit anisotropic fabrics which can reveal much about geodynamic processes in the subsurface. These fabrics can exist at a variety of scales, from crystallographic orientations to regional structure alignments. In the past few decades, a tremendous body of multidisciplinary research has been dedicated to characterizing anisotropy in the solid Earth and understanding its geodynamical implications. This has included work in fields such as: (1) geophysics, to make in situ observations and construct models of anisotropic properties at a range of depths; (2) mineral physics, to explain the cause of some of these observations; and (3) numerical modelling, to relate the inferred fabrics to regional stress and flow regimes and, thus, geodynamic processes in the Earth. The study of anisotropy in the Solid Earth encompasses topics so diverse that it often appears fragmented according to regions of interest, e.g., the upper or lower crust, oceanic lithosphere, continental lithosphere, cratons, subduction zones, D'', or the inner core. The aim of this session is to bring together scientists working on different aspects of anisotropy to provide a comprehensive overview of the field. We encourage contributions from all disciplines of the earth sciences (including mineral physics, seismology, magnetotellurics, geodynamic modelling) focused on anisotropy at all scales and depths within the Earth.

Imaging and characterization of both seismogenic structures and elastic/anelastic properties of the surrounding medium play a key role in the understanding of the deformation processes from regional to small scale. The presence of fluids and crustal heterogeneity makes analysis by geophysical methods challenging. In these conditions, fluids interact with seismic sources caused by deformation, affecting the genesis and growth of seismic sequences. Nowadays also for many green energy applications, it is crucial to comprehend the geometry and kinematics of crustal-scale faults from field measurements (e.g., geothermal energy, CO2 storage, mining for minerals important for battery production) with the goal of minimizing the related risks to geo-resources exploitation.

This session is designed to propose a discussion about cutting-edge seismic techniques with the aim of imaging and characterizing seismically active and ancient faults in tectonic and volcanic areas. Contributions to the session may include challenging applications, where the joint inversion of both active and passive seismic data are employed to shed light on not-straightforward complexities in different geological contexts, even integrated by the results derived from other geophysical investigations.

We welcome contributions from velocity tomography, attenuation tomography (coda, t* method, direct wave attenuation), source imaging and characterization (absolute and relative location techniques, focal mechanism and stress drop analysis, receiver functions), active-source seismic techniques (reflection, refraction, integrated drilling data, seismic attributes), along with multidisciplinary studies. As a final issue, other geophysical data (e.g. potential methods like gravimetric, magnetic, or geo-electric studies) could also provide further helpful information, to better constrain the interpretation of seismological data. We particularly encourage contributions from early-career researchers and those using novel techniques (e.g., data mining and machine learning).

We invite, in particular multidisciplinary, contributions which focus on the structure, deformation and evolution of the continental crust and upper mantle and on the nature of mantle discontinuities. The latter include, but are not limited to, the mid-lithosphere discontinuity (MLD), the lithosphere-asthenosphere boundary (LAB), and the mantle transition zone, as imaged by various seismological techniques and interpreted with interdisciplinary approaches. Papers with focus on the structure of the crust and the nature of the Moho are also welcome.
The session topic is interpretation and modelling of the geodynamic processes in the lithosphere-asthenosphere system and the interaction between crust and lithospheric mantle, as well as the importance of these processes for the formation of the discontinuities that we today observe in the crust and mantle. We aim at establishing links between seismological observations and process-oriented modelling studies to better understand the relation between present-day fabrics of the lithosphere and contemporary deformation and ongoing dynamics within the asthenospheric mantle. Methodologically, the contributions will include studies based on application of geochemical, petrological, tectonic and geophysical (seismic, thermal, gravity, electro-magnetic) methods with emphasis on integrated interpretations.

Convergent plate boundaries can result in a wide variety of tectonic feature from collisional orogens (e.g. the Himalaya or Pyrenees) through subduction orogens (e.g. the Andes or Taiwan) to arc-back-arc systems (e.g. Sea of Japan or the Aegean). These tectonic settings might transition from one to another like in Southeast Asia, where there is geodynamic inversion of the east dipping Manila oceanic subduction South of Taiwan, that evolves northward, first, into a Continental Subduction (collision) onshore Taiwan, then secondly, east of Taiwan, into the north dipping Ryukyu arc/continent subduction.

Recently a large volume of high quality and high resolution geophysical and geological data had been acquired that could help us better understand the processes that govern subduction, collision and back-arc extension. Our session has a special focus on overriding plate deformation as it shows a great variety between different systems from extension dominated settings to compression dominated ones.

In this session authors are encouraged to share their work on the tectonic or magmatic features convergent plate boundary settings, as well as on the study of the processes contributing to the formation, evolution, and shaping of such systems. The conveners encourage contributions using multi-disciplinary and innovative methods from disciplines such as, but not restricted to, field geology, thermochronology, geochemistry, petrology, seismology, geophysics and marine geophysics, and analogue/numerical modelling.

Our planet is shaped by a multitude of physical, chemical and biological processes. Most of these processes and their effect on the ground’s properties can be sensed by seismic instruments – as discrete events or ongoing signatures. Seismic methods have been developed, adopted and advanced to study those dynamics at or near the surface of the earth, with unprecedented detail, completeness and resolution. The community of geophysicists interested in earth surface dynamics and geomorphologists, glaciologists, hydrologists, volcanologists, geochemists, biologists and engineering geologists interested in using arising geophysical tools and techniques is progressively growing and collaboratively advancing that emerging scientific discipline.

When you are interested in contributing to or getting to know about the latest methodological and theoretical developments, field and lab scale experimental outcomes, and the broad range of applications in geomorphology, glaciology, hydrology, meteorology, engineering geology, volcanology and natural hazards, then this session would be your choice. We anticipate a lively discussion about standing questions in earth surface dynamics research and how seismic methods could help solving them, we will debate about community based research opportunities and are looking forward to bringing together transdisciplinary knowledge and mutual curiousity.

Topical keywords: erosion, transient, landslide, rockfall, debris flow, fracturing, stress, granular flow, rock mechanics, snow avalanche, calving, icequake, basal motion, subglacial, karst, bedload, flood, GLOF, early warning, coast, tsunami, eruption, tremor, turbidity current, groundwater, soil moisture, noise, dv/v, HVSR, fundamental frequency, polarisation, array, DAS, infra sound, machine learning, classification, experiment.

We are happy to announce Agnes Helmstetter as invited speaker!