EGU26-2544, updated on 13 Mar 2026
https://doi.org/10.5194/egusphere-egu26-2544
EGU General Assembly 2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
PICO | Monday, 04 May, 08:47–08:49 (CEST)
 
PICO spot 1b, PICO1b.6
Integrated Workflow for Earthquake Stress Modelling and Seismicity Analysis Using Coulomb 4.0 and the ISC Earthquake Toolbox
Kostas Leptokaropoulos1, Shinji Toda2, Tom Garth3, Kaede Yoshizawa2, Ross Stein4, Ryan Gallacher3, Volkan Sevilgen4, and Jian Lin5
Kostas Leptokaropoulos et al.
  • 1The MathWorks, Cambridge, UK (kleptoka@mathworks.com)
  • 2Tohoku University, Tohoku, Japan (toda@irides.tohoku.ac.jp, yoshizawa.kaede.q1@dc.tohoku.ac.jp)
  • 3International Seismological Centre (ISC), Thatcham, UK (tom.garth@isc.ac.uk, ryan@isc.ac.uk)
  • 4Temblor Inc, Redwood City, CA, USA (ross@temblor.net, volkan@temblor.net)
  • 5Southern University of Science and Technology, Shenzhen, China (linj@sustech.edu.cn)

We introduce an integrated workflow in MATLAB that combines Coulomb 4.0, a major revision of the widely used Coulomb, stress interaction and deformation application, with the ISC Earthquake Toolbox, which provides direct access to the International Seismological Centre (ISC) Bulletin. This interoperability enables researchers to seamlessly transition from global earthquake data acquisition to stress interaction analysis within a single environment.

The workflow begins by querying and importing earthquake catalogs from the ISC Bulletin using the toolbox’s GUI, allowing selection by time, region, depth and magnitude. These events can then be visualized in 3D and cross-section views, and their parametric data, including moment tensors, are used to define fault geometries in Coulomb 4.0. New Coulomb features, such as automatic fault parameter scaling from magnitude and interactive fault editing, streamline the setup of rupture planes based on ISC-reported events. Stress transfer calculations and deformation modelling can then be performed, with results displayed alongside seismicity overlays for comprehensive interpretation.

This combined approach enhances reproducibility and efficiency by eliminating manual data handling and enabling dynamic visualization of both seismicity and modelled stress/deformation changes. We demonstrate the workflow using recent seismic sequences, highlighting its potential for earthquake interaction studies, hazard assessment, and educational applications. By bridging global seismic data with advanced stress modelling, this interoperability represents a significant step toward integrated geoscience software ecosystems.

The ISC Earthquake Toolbox can be freely accessed from:

  • GitHub (https://github.com/tomgarth/ISC_Earthquake_Toolbox) and
  • File Exchange (https://www.mathworks.com/matlabcentral/fileexchange/167786-isc-earthquake-toolbox?s_tid=srchtitle)

Coulomb 4.0 can be freely accessed from:

  • GitHub (https://github.com/YoshKae/Coulomb_ver4) and
  • temblor.net/coulomb/.

How to cite: Leptokaropoulos, K., Toda, S., Garth, T., Yoshizawa, K., Stein, R., Gallacher, R., Sevilgen, V., and Lin, J.: Integrated Workflow for Earthquake Stress Modelling and Seismicity Analysis Using Coulomb 4.0 and the ISC Earthquake Toolbox, EGU General Assembly 2026, Vienna, Austria, 3–8 May 2026, EGU26-2544, https://doi.org/10.5194/egusphere-egu26-2544, 2026.