1. Regional Magnitude Mwa in the Russian Far East.
- Author
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Safonov, D. A. and Semenova, E. P.
- Subjects
EARTHQUAKE magnitude measurement ,SEISMOMETERS ,SEISMOLOGY ,EARTHQUAKE zones ,SEISMIC response - Abstract
The Yuzhno-Sakhalinsk Seismological Regional Information Processing Center (RIPC) recently used the Richter magnitude M
wa to estimate the energy level of Far Eastern earthquakes. To date, this is the most common energy characteristic in the operational catalog of the RIPC. The basis is digital waveforms of regional seismic stations emulated to the characteristics of the Wood–Anderson seismograph. In the present paper, the results of determining the magnitude Mwa in Russian Far Eastern conditions are analyzed. The magnitude determination accuracy is estimated, and station corrections are obtained. The regression relation Mwa and Japanese Meteorological Agency magnitude Mj showed a high similarity between these scales. This made it possible to use Mj as the reference when studying the features of Mwa . The regional seismic network makes it possible to correctly estimate the magnitude Mwa at a regional distance (up to about 1000 km), including for deep-focus earthquakes (up to 600 km). Transfer relations between Mwa and other mass-determined regional energy characteristics of earthquakes are obtained. The Mwa scale can be used to estimate the energy level of any earthquakes in the Kuril–Okhotsk and Sakhalin regions in the magnitude range of weak and moderately strong events and is recommended for inclusion in regional earthquake catalogs for the Russian Far East. [ABSTRACT FROM AUTHOR]- Published
- 2022
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