Seismicityof the Novaya Zemlya archipelago: relocated event catalog from 1974 to 2014
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We have relocated seismic events registered in the area of the Novaya Zemlya Archipelago, which are not identified as nuclear explosions but are probably of tectonic nature. For the relocation, we collected all available seismic bulletins and waveform data. The location was performed by applying a modified method of generalized beamforming. Verification of the modified method and selection of the travel time model were performed using data on two Novaya Zemlya nuclear explosions that occurred on 02.11.1974 and 24.10.1990. The modified method and the BARENTS travel time model provide sufficient accuracy for event location in the region. The relocation procedure was applied for 9 seismic events registered in the area of the Novaya Zemlya Archipelago. As a result, the new coordinates of the five events turned out to be significantly different from those that were defined previously.
KeywordsNovaya Zemlya archipelago Earthquakes catalog Relocation procedures
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 research to relocated seismic events was provided by the Council of the Russian Federation President Grant MK-7387.2016.5. Funding research to verification of the algorithm, selection of travel time model, and location error estimation was provided by Russian Foundation for Basic Research (grant No. 16-35-00020).
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