Preprints
https://doi.org/10.5194/essd-2023-489
https://doi.org/10.5194/essd-2023-489
08 Dec 2023
 | 08 Dec 2023
Status: a revised version of this preprint was accepted for the journal ESSD and is expected to appear here in due course.

Enriching the GEOFON seismic catalogue with automatic energy magnitude estimations

Dino Bindi, Riccardo Zaccarelli, Angelo Strollo, Domenico Di Giacomo, Andres Heinloo, Peter Evans, Fabrice Cotton, and Frederik Tilmann

Abstract. We present a seismic catalogue including energy magnitude Me estimated from P-waves recorded at teleseismic distances in the range 20o ≤ Δ ≤ 98o and for depths less than 80 km. The catalogue is built starting from the event catalogue disseminated by GEOFON, considering 6349 earthquakes with moment magnitude Mw ≥ 5 occurring between 2011 and 2023. Magnitudes are computed using 1031396 freely available waveforms archived in EIDA and IRIS repositories, retrieved through standard FDSN webservices (https://www.fdsn.org/webservices/). A reduced, high quality catalogue for events with Mw ≥ 5.8 and from which stations and events with only few recordings were removed forms the basis of a detailed analysis of the residuals of individual station measurements, which are decomposed into station and event specific terms, and a term accounting for remaining variability. The derived Me values are compared to Mw computed by GEOFON and with the Me values calculated by IRIS. Software and tools developed for downloading and processing waveforms for bulk analysis and an add-on for SeisComP for real-time assessment of Me in a monitoring context are also provided alongside the catalogue. The SeisComP add-on is part of the GEOFON routine processing since December 2021 to compute and disseminate Me for major events via the existing services.

Dino Bindi, Riccardo Zaccarelli, Angelo Strollo, Domenico Di Giacomo, Andres Heinloo, Peter Evans, Fabrice Cotton, and Frederik Tilmann

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2023-489', Anonymous Referee #1, 15 Jan 2024
  • RC2: 'Comment on essd-2023-489', Anonymous Referee #2, 26 Jan 2024
  • EC1: 'Comment on essd-2023-489', Andrea Rovida, 09 Feb 2024

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2023-489', Anonymous Referee #1, 15 Jan 2024
  • RC2: 'Comment on essd-2023-489', Anonymous Referee #2, 26 Jan 2024
  • EC1: 'Comment on essd-2023-489', Andrea Rovida, 09 Feb 2024
Dino Bindi, Riccardo Zaccarelli, Angelo Strollo, Domenico Di Giacomo, Andres Heinloo, Peter Evans, Fabrice Cotton, and Frederik Tilmann

Model code and software

me-compute: a Python software to download events and data from FDSN web services and compute their energy magnitude (Me) R. Zaccarelli https://doi.org/10.5880/GFZ.2.6.2023.008

SeisComP MeRT repository A. Heinloo https://github.com/SeisComP/scmert

Dino Bindi, Riccardo Zaccarelli, Angelo Strollo, Domenico Di Giacomo, Andres Heinloo, Peter Evans, Fabrice Cotton, and Frederik Tilmann

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Short summary
The size of an earthquake is often described by a single number called magnitude. Among the possible magnitude scales, the seismic moment (Mw) and the radiated energy (Me) scales are based on physical parameters describing the rupture process. Since these two magnitude scales provide complementary information that can be used for seismic hazard assessment and for seismic risk mitigation, we complement the Mw catalogue disseminated by the GEOFON Data Centre with Me values.
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