ORFEUS-Coordinated Seismological Datasets and Community Services in the Euro-Mediterranean Region and Beyond

ORFEUS (Observatories and Research Facilities for European Seismology, www.orfeus-eu.org; orfeus.readthedocs.io; forum.orfeus-eu.org) is a non-profit organization that harmonizes the collection, archival, and distribution of seismic waveform (meta)data, services and products based on international standards, and serves a broad community of seismological data users, on behalf of the Euro-Mediterranean seismic networks and monitoring agencies (orfeus.readthedocs.io/en/latest/governance.html). ORFEUS core domains comprise: (i) the European Integrated waveform Data Archive (EIDA; orfeus-eu.org/data/eida), providing access to raw seismic waveform data and basic station metadata; (ii) the European Strong-Motion databases (orfeus-eu.org/data/strong), offering automatically/manually processed waveforms, advanced station/site metadata, and associated products ; and iii) the European Mobile Instrument Pools (orfeus-eu.org/data/mobile), facilitating utilization of seismic instrumentation for temporary deployments. Currently, ORFEUS services distribute waveform data from more than  24,000 stations, including dense temporary experiments (eg., orfeus.readthedocs.io/en/latest/adria_array_main.html), emphasizing FAIR principles, open access, and high quality of datasets. ORFEUS services form a critical component of EPOS (www.epos-eu.org/tcs/seismology) and are seamlessly integrated into the EPOS Data Access Portal (www.ics-c.epos-eu.org). Access to data and products relies on state-of-the-art information and communication technologies, with a strong emphasis on web services (www.orfeus-eu.org/data/eida/webservices; https://esm-db.eu/webservices) for programmatic interaction. ORFEUS promotes the usage of transparent data policies and licenses and acknowledges the indispensable contribution of data providers. ORFEUS aims to enhance the existing services and facilitate access to massive & multidisciplinary datasets through collaborative efforts with global and regional initiatives, such as the FDSN (www.fdsn.org) and EarthScope (www.earthscope.org),  as well as  support from EC-funded projects (e.g., www.geo-inquire.eu). ORFEUS also implements Community services that include software and travel grants, a lively training/outreach programme of webinars and workshops (www.orfeus-eu.org/other/workshops), and editorial initiatives (e.g., orfeus.readthedocs.io/en/latest/conference_sessions.html; orfeus.readthedocs.io/en/latest/SRL_Focus_Section.html).