The instrumental seismicity of the Barents and Kara sea region: relocated event catalog from early twentieth century to 1989 |
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| Authors: | Alexey Nikolaevich Morozov Natalya V Vaganova Vladimir E Asming Yana V Konechnaya Zinaida A Evtyugina |
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| Institution: | 1.Department of Seismology,N. Laverov Federal Center for Integrated Arctic Research,Arkhangelsk,Russia;2.Kola Branch of Geophysical Survey of Russian Academy of Sciences,Apatity,Russia;3.Seсtor of Seismic Monitoring of the North of the Russian Plate,Geophysical Survey of Russian Academy of Sciences,Arkhangelsk,Russia |
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| 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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