SEISMICITY of the URALS and WESTERN SIBERIA in 2016–2017

Verkholantsev, F.; Golubeva, I.; Dyagilev, R. A.; Zlobina, T.V.

doi:10.35540/1818-6254.2022.25.20

Earthquakes in Northern Eurasia

2022

DOI: 10.35540/1818-6254.2022.25.20

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SEISMICITY of the URALS and WESTERN SIBERIA in 2016–2017

F. Verkholantsev

I. Golubeva

R. A. Dyagilev

et al.

Abstract: The article summarizes information about seismic network in the Urals and Western Siberia region, describes processing technique, presents short analysis of seismic activity for 2016–2017. Seismic network capability is shown for whole territory under control. It was found that about 84 % of registered events are explosions in mines and open pits, 89 events are natural or induced ones. For the strongest induced events, variants of source parameters obtained by different agencies are shown.

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2023

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Cited by 3 publications

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SEISMICITY of the URALS and WESTERN SIBERIA in 2018–2019

Verkholantsev,

Golubeva,

Dyagilev

et al. 2023

Earthquakes in Northern Eurasia

View full text Add to dashboard Cite

The article summarizes information about seismic network in the Urals and Western Siberia region, describes processing technique, presents short analysis of seismic activity for 2018–2019. Seismic network capability is shown for whole territory under control. It was found that about 82 % of registered events are explosions in mines and open pits, 74 events are natural and 76 are induced ones. For the strongest induced events, variants of source parameters obtained by different agencies are shown.

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SEISMICITY of the URALS and WESTERN SIBERIA in 2018–2019

Verkholantsev,

Golubeva,

Dyagilev

et al. 2023

Earthquakes in Northern Eurasia

View full text Add to dashboard Cite

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SEPTEMBER 4, 2018 KATAV-IVANOVSK EARTHQUAKE with ML=5.4, mb=5.5, I0=6.4

Verkholantsev,

Diagilev,

Shulakov

et al. 2023

Earthquakes in Northern Eurasia

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The instrumental and macroseismic data on the earthquake of September 4, 2018 at 22h58m19s UTC, ML=5.4, I0=6.4±0.3 near the city of Katav-Ivanovsk in the Chelyabinsk region (South Urals) are presented. This event with ML=5.4 mb=5.5 became the strongest instrumentally recorded earthquake in the Urals and had the highest macroseismic effect among the Russian earthquakes in 2018 (I0=6.4±0.3). For the first time in the practice of processing macroseismic data in the Urals, the Seismic Intensity Scale 2017 (GOST R 57546-2017) was used. For the first time for natural earthquakes in the Urals, an aftershock process was recorded, the active stage of which lasted about 11 months, while many aftershocks had a significant macroseismic effect. Taking into account the spatial orientation of the aftershock cloud, the focal mechanism solution was confirmed and the tectonic position of the source was substantiated.

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Comparison of earthquake classification systems in local magnitudes ML in some regions of Northern Eurasia

Petrova

Kurova

2023

RJS

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The ML local magnitudes of the earthquakes of Armenia, Azerbaijan, the Arctic and the Baltic Shield (KOGSR and FCIAR station networks), the Urals and Altai and Sayan were analyzed. The regional dependences of ML on the mbISC “external” magnitude are established. It is shown that the magnitudes ML of weak and moderate seismic events registered by the seismic stations of these regions, with the exception of Altai and Sayan, are close at the same mbISC both among themselves and to ML according to the NAO, HEL, DDA, TEH networks of neighboring countries. For all regions, except for Altai and Sayan, a general dependence is established in the form: MLav=1.06⋅mbISC–0.34. A significant overestimation of the ML of Altai and Sayan earthquakes recorded by the regional network is found relative to other data. For the main group of data, the excess of local magnitudes ML=f(KR) over magnitude M in the known T.G. Rautian ratio, KR=lgE=1.8⋅M+4, by DM=0.2÷0.4 in the magnitude range of ML=1.0÷6.0 is shown. For Altai and Sayan earthquakes, the overestimation of local magnitudes is more significant and should be taken into account when calculating seismic energy using the regional ratio KR=f(ML). In general, magnitudes in the ratio KR=1.8⋅M+4 for weak and moderate earthquakes are closer to local magnitudes ML, and for strong events with KR>13 (Ms>5.0) – to surface wave magnitudes Ms.

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SEISMICITY of the URALS and WESTERN SIBERIA in 2016–2017

Cited by 3 publications

References 14 publications

SEISMICITY of the URALS and WESTERN SIBERIA in 2018–2019

SEISMICITY of the URALS and WESTERN SIBERIA in 2018–2019

SEPTEMBER 4, 2018 KATAV-IVANOVSK EARTHQUAKE with ML=5.4, mb=5.5, I0=6.4

Comparison of earthquake classification systems in local magnitudes ML in some regions of Northern Eurasia

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