Characteristic Ddepth distribution of crustal earthquakes in Southern Siberia

Мұқаба

Дәйексөз келтіру

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Ашық рұқсат Ашық рұқсат
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Рұқсат жабық Рұқсат ақылы немесе тек жазылушылар үшін

Аннотация

The key parameters of an earthquake are magnitude, epicenter coordinates, and depth. Depth often has a decisive influence on the macroseismic effect of certain earthquakes. In this regard, for example, to assess seismic risk, one should know information on the statistics of earthquake occurrence at certain depths. In this work, catalogs of continental crustal earthquakes in the Southern Siberia are analyzed. The distributions of earthquake depths are approximated by various functions. The Weibull distribution, with a maximum at 8 km, is shown to describe the depth distribution of these crustal earthquakes most accurately. When the western (Altai–Sayan) and eastern (Baikal Rift Zone) parts of the region are considered separately, the Weibull distribution is also preferable. The maximum of the distribution is found to be at 9 km for the Baikal rift zone and at 7 km for the Altai–Sayan zone.

Толық мәтін

Рұқсат жабық

Авторлар туралы

P. Malyutin

Institute of Earthquake Prediction Theory and Mathematical Geophysics, Russian Academy of Sciences; Moscow State University; Schmidt Institute of Physics, Russian Academy of Science

Хат алмасуға жауапты Автор.
Email: pavel@mitp.ru

Faculty of Physics of the Earth

Ресей, 117997 Moscow; 119991 Moscow; 123242 Moscow

A. Skorkina

Institute of Earthquake Prediction Theory and Mathematical Geophysics, Russian Academy of Sciences

Email: pavel@mitp.ru
Ресей, Moscow, 117997

I. Vorobieva

Institute of Earthquake Prediction Theory and Mathematical Geophysics, Russian Academy of Sciences; Geophysical Center, Russian Academy of Sciences,

Email: pavel@mitp.ru
Ресей, 117997 Moscow; Moscow, 119296

S. Baranov

Institute of Earthquake Prediction Theory and Mathematical Geophysics, Russian Academy of Sciences; Kola Branch, Geophysical Survey, Russian Academy of Sciences

Email: pavel@mitp.ru
Ресей, 117997 Moscow; Apatity, 184209

S. Matochkinaa

Institute of Earthquake Prediction Theory and Mathematical Geophysics, Russian Academy of Sciences; Moscow State University

Email: pavel@mitp.ru

Faculty of Physics of the Earth

Ресей, 117997 Moscow; 119991 Moscow

A. Molokova

Institute of Earthquake Prediction Theory and Mathematical Geophysics, Russian Academy of Sciences; Moscow State University

Email: pavel@mitp.ru

Faculty of Physics of the Earth

Ресей, 117997 Moscow; 119991 Moscow

P. Shebalin

Institute of Earthquake Prediction Theory and Mathematical Geophysics, Russian Academy of Sciences; Geophysical Center, Russian Academy of Sciences

Email: pavel@mitp.ru
Ресей, Moscow, 117997; Moscow, 119296

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Қосымша файлдар

Қосымша файлдар
Әрекет
1. JATS XML
Жүктеу
2. Fig. 1. Map of earthquake epicenters (main shocks) in Southern Siberia from 1982 to 2022, where the radius of the circle corresponds to the magnitude of the earthquake.

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3. Fig. 2. Distribution of earthquake depths in Southern Siberia by longitude (a) and by years (b), (c).

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4. Fig. 3. Distribution of the focal depths of the Altai-Sayan earthquakes and approximation variants. On the left are differential distributions, on the right are integral distributions and the approximation variants considered. Below is the full earthquake catalog, above is the main shock catalog (aftershocks are removed). Approximation variants are truncated distributions: inverse Gaussian distribution, log-logistic distribution, logistic distribution, normal distribution, log-normal distribution, gamma distribution, Weibull distribution.

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5. Fig. 4. Distribution of focal depths of the Baikal rift earthquakes and approximation variants. On the left are differential distributions, on the right are integral distributions and the approximation variants considered. Below is the full earthquake catalog, above is the main shock catalog (aftershocks are removed). Approximation variants are truncated distributions: inverse Gaussian distribution, log-logistic distribution, logistic distribution, normal distribution, log-normal distribution, gamma distribution, Weibull distribution.

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6. Fig. 5. Histograms of earthquake foci depths in Southern Siberia and the approximation options considered. The full earthquake catalog without aftershocks was used. The approximation options are as in Fig. 3 and Fig. 4. On the left – fixed depth values ​​are excluded, on the right – without excluding fixed values.

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Метадеректер

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