Detailed seismicity mapping of the Altai-Sayan zone using large averaging areas |
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Authors: | A.A. Dergachev |
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Affiliation: | aGeophysical Surveys of the Siberian Branch of the RAS, Altai-Sayan Department, 3 prosp. Akad. Koptyuga, Novosibirsk, 630090, Russia |
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Abstract: | An improved technique is suggested for quantifying seismic activity over averaging areas of an arbitrary size. The example of the Altai-Sayan seismic zone is used to substantiate the choice of a 1° N × 2° E averaging area instead of the traditional one of 40×40 km2. Maps compiled with averaging areas of different sizes can be spliced and correlated using a correction coefficient estimated in different models. The new seismicity map of the Altai-Sayan area covers more than 90% of the territory and provides a generalized image of activity being advantageous over the classic maps as it allows better correlation of regional seismicity with the tectonic setting. With larger averaging areas and, correspondingly, a greater amount of data in each area, one can obtain time series of seismic activity to be analyzed using mathematical statistics as a basis for mathematical modeling and simulation of the seismic process. |
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Keywords: | Earthquake seismic activity averaging area correction coefficient time series of seismic activity Altai-Sayan seismic zone |
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