DOI: 10.5281/zenodo.18494501
title: SL-NKUA Seismic Hazard Earthquake Catalogue

description: SL-NKUA Seismic Hazard Earthquake Catalogue

Authors



Angelos Zymvragakis (National and Kapodistrian University of Athens) — ORCID

George Kaviris (National and Kapodistrian University of Athens) — ORCID

Ioannis Spingos (National and Kapodistrian University of Athens) — ORCID


Description

Makropoulos et al. (2012) released their earthquake catalogue of Greece, intended for use in seismic hazard modelling, covering the time period between 1900–2009. Their catalogue was homogenized, in terms of magnitude types, to facilitate proper estimation of hazard-related seismicity parameters (e.g. Gutenberg-Richter parameters). The Seismic Hazard Earthquake Catalogue of SL-NKUA (SHECSL) enhances the original catalogue by extending it to 2023, including strong recent earthquakes such as the 2020 Samos earthquake of Mw=6.7. Event origins and magnitudes were retrieved from ISC Bulletin, and the same homogenization process was applied to the newer events (i.e., convert ISC's mb to Ms and Mw). The ISC mb used in our extending process (post-2009) is included (original magnitudes were not pusblished with the original catalogue). We include all available earthquakes of Mw≥4.1, independent of depth, so that the user may isolate crustal or intermediate depth (or use both) earthquakes, based on their use-cse.

SHECSL (with the events until 2009 retrieved from the Makropoulos et al. (2012) catalogue) was built on the following sources:




Period
Source




1908–1959
Annual bulletins of the Seismological Institute of Uppsala (SIU) for the recordings of the station UPP


1951–1955
Annual bulletins of SIU for the recordings of the station KIR (Kiruna)


1956–1963
Monthly bulletins of SIU for all Swedish Seismological Network


1901–1970
UNDP/UNESCO Survey of the Seismicity of the Balkan Region


1964–2023
ISC (up to 2009 in the original catalogue)




Description of Extended (post-2009) data



Number of earthquakes added: 1,788

Focal depth range (km): 0 - 184

mb range: 4.2 - 6.4

Ms range: 4.0 - 7.0

MW range: 4.1 - 6.7


Files

The catalogue is provided as a CSV file:

nkua_sl_seismic_hazard_earthquake_catalogue.csv


Field description:



source_origin_time: Origin time in ISO 8601 timestamp.

source_origin_year: Origin year (integer).

source_origin_month: Origin month (integer).

source_origin_day: Origin day (integer).

source_origin_hour: Origin hour (integer).

source_origin_minute: Origin minute (integer).

source_origin_second: Origin second (float).

source_origin_latitude_deg: Source latitude in decimal degrees (WGS84) (float).

source_origin_longitude_deg: Source longitude in decimal degrees (WGS84) (float).

source_origin_depth_km: Source focal depth in km (float).

source_magnitude_ms: Surface wave magnitude (Ms) (float).

source_magnitude_mw: Moment magnitudes (Mw) (float).

source_magnitude_mb_isc: Body-wave magnitude (mb) (float).

source_doi: Persistent identifier of the original source of the origin and magnitude data (string).


Additional files



LICENSE: CC BY-NC 4.0 legal code.

README.md: The current README file.


Keywords



Seismology

Seismic Hazard

Earthquake Catalogue

Greece


License

Attribution-NonCommercial 4.0 International

Funding



European Commission OSCARS - O.S.C.A.R.S. - Open Science Clusters’ Action for Research and Society Grant agreement ID: 101129751


Version

1.0.0

Publication date (YYYY-MM-DD)

2026-02-05

Size and formats



Total size: 879 KB

File formats: CSV


How to cite

Zymvragakis, A., Kaviris, G., Spingos, I. (2026). SL-NKUA Seismic Hazard Earthquake Catalogue. Zenodo.

Contact



Name: Angelos Zymvragakis

Email: azymvragakis@geol.uoa.gr

Affiliation: National and Kapodistrian University of Athens