Abstract
We have relocated seismic events registered within the Barents and Kara sea region from early twentieth century to 1989 with a view to creating a relocated catalog. For the relocation, we collected all available seismic bulletins from the global network using data from the ISC Bulletin (International Seismological Centre), ISC-GEM project (International Seismological Centre–Global Earthquake Model), EuroSeismos project, and by Soviet seismic stations from Geophysical Survey of the Russian Academy of Sciences. The location was performed by applying a modified method of generalized beamforming. We have considered several travel time models and selected one with the best location accuracy for ground truth events. Verification of the modified method and selection of the travel time model were performed using data on four nuclear explosions that occurred in the area of the Novaya Zemlya Archipelago and in the north of the European part of Russia. The modified method and the Barents travel time model provide sufficient accuracy for event location in the region. The relocation procedure was applied to 31 of 36 seismic events registered within the Barents and Kara sea region.
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Acknowledgments
The authors would like to thank the employees of the Archive of the Geophysical Survey of the Russian Academy of Sciences. Thanks are extended to the head of the Department of Seismology at the Federal Center for Integrated Arctic Research, Galina Antonovskaya, for supporting the scientific research.
Funding
Funding research to relocated seismic events was provided by the project no. АААА-А18-118012490072-7.
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Seismic station bulletins of the ISC are available from http://www.isc.ac.uk/ (last accessed March 2018); of the ISC-GEM project are available from http://storing.ingv.it/bulletins/ISC-GEM/ (last accessed March 2018); of the EuroSeismos (ES) project are available from http://storing.ingv.it/es_web/(last accessed March 2018). Bulletins of the Soviet seismic stations were collected using data from the Geophysical Survey of RAS (http://ceme.gsras.ru/new/eng/ssd_news.htm; last accessed March 2018).
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Morozov, A.N., Vaganova, N.V., Asming, V.E. et al. The instrumental seismicity of the Barents and Kara sea region: relocated event catalog from early twentieth century to 1989. J Seismol 22, 1171–1209 (2018). https://doi.org/10.1007/s10950-018-9760-y
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DOI: https://doi.org/10.1007/s10950-018-9760-y