Specification of mechanisms of earthquake sources in the Carpathian region
One of the urgent problems - a solution of the focal mechanism of an earthquake is considered. On the example of several events occurred in the Carpathian region of Ukraine, the solving of this problem with a graphic method is proposed. This method is based on identifying the best location option of...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine
2014-08-01
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| Series: | Геофизический журнал |
| Subjects: | |
| Online Access: | https://journals.uran.ua/geofizicheskiy/article/view/116032 |
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| Summary: | One of the urgent problems - a solution of the focal mechanism of an earthquake is considered. On the example of several events occurred in the Carpathian region of Ukraine, the solving of this problem with a graphic method is proposed. This method is based on identifying the best location option of nodal planes relatively to both the fuzzy P-wave arrivals and the values of the logarithm of the ratio of the S-wave amplitude to the P-wave amplitude. A sequence of plotting diagrams for determining the focal mechanism is presented. The focal mechanisms and types of faults are determined by using this method for 6 events occurred in the Transcarpathian region. The similarity of the focal mechanisms for repeated earthquakes is shown. The dynamic parameters of the sources of 4 earthquakes occurred in 2012-2013 are retrieved by using data from the spectra of records converted into displacements according to the Brune model. |
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| ISSN: | 0203-3100 2524-1052 |