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Izsledvane na prost...
Izsledvane na prostranstveno-vremennite energetichni kharakteristiki na poreditsata Velingradski zemetreseniya (noyemvri 1977-april 1978 god.)
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Dineva, Savka (författare)
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Sokerova, D. (författare)
- 1979
- 1979
- Bulgariska.
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Ingår i: Balgarsko Geofizicno Spisanie. ; 5:3, s. 53-64
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
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- Earthquakes manifested in a small volume of the earth's crust are analysed, presuming that the orientation of the rupture disturbances is conditioned by the local neotectonic conditions. A relation is sought between the seismic manifestations and the modern crushing structures in the earthquake region. In this very case, the earthquakes in the Velingrad district (Bulgaria) are analysed, which began with an earthquake of the 5,3 magnitude and a maximum intensity of the VII-VIII degree by the Medvedev-Schponheuer- Karnik scale and the followed 504 earthquakes for a period of 179 days. From the data obtained, a presence of a complex ridge-like structure can be presumed, which develops in a valley depression on the background of a vault block rising in the limits of the granite layer of the earth crust, to a 15 km depth. The frequency of the earthquakes is obtained as a function of the difference (tsg - tpg) and the greatest earthquake frequency is shown to be in the interval of 0,8-1,4 sec and the greatest difference of times corresponds to a 20 km hypocentral distance
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- ref (ämneskategori)
- art (ämneskategori)
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