The provided earthquake catalogue for the Kyrgyz Republic includes earthquakes that occurred within 200 km of the country’s border, from around 250 B.C.E. until 2014. The original catalogue was compiled starting from that provided by the Earthquake Model Central Asia (EMCA) project1, which considered events that had occurred until 2009 (Mikhailova et al., 2015). The catalogue has been extended by considering the seismicity in this area extracted from the bulletins released by the Kyrgyz Institute of Seismology (KIS) and the Incorporated Research Institutions for Seismology (IRIS2) until 2014. For events after 2009, those located with an azimuthal gap smaller than 180° have been considered from the KIS bulletin in order to guarantee an acceptably accurate location, while the IRIS catalogue was used in the cases where an event was not included in the KIS one. This selection allowed us to extend the spatial coverage of the catalogue, especially for the areas located outside of the country’s border within the 200 km buffer zone, as required by the project. This catalogue has been declustered using the Gardner and Knopoff (Gardner and Knopoff, 1974) method, as implemented in the OpenQuake HMTK (Hazard Modellers Tool Kit, Weatherill, 2014). The declustering was carried out in two steps, for those events shallower than 50 km, and those between 50 and 300 km. Gardner, J.K. and Knopoff, L. (1974) Is the sequence of earthquakes in Southern California, with aftershocks removed, Poissonian? Bulletin of the Seismological Society of America, 64, 1363-1367. Mikhailova, N. N., Mukambayev, A., Aristova, I. L., Kulikova, G., Ullah, S., Pilz, M. and Bindi, D. (2015) Central Asia Earthquake catalogue from ancient time to 2009, Annals of Geophysics, 58(1), S0102, doi: 10.4401/ag-6681. Weatherill, G.A. (2014) OpenQuake Hazard Modeller’s Toolkit - User Guide. Global Earthquake Model (GEM). Technical Report. Data set for the World Bank supported project "Measuring Seismic Risk in Kyrgyz Republic" No: 1152423 Coodinator: Arup.
Shared on 22 nov 2015