Spatial distribution of crustal earthquakes in the Caucasusстатья
Информация о цитировании статьи получена из
Web of Science
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 4 сентября 2019 г.
Аннотация:Previous results on the location of crustal earthquake foci in the Caucasus clearly show that themethods used in seismic service practice to determine the hypocenters of earthquakes do not allow accuratelocalization of events and can hardly be used to forecast earthquakes or study the structure of the Earth’s crustand upper mantle in detail. The arrival times of seismic waves often have large errors that prevent qualitativeprocessing of observations and, therefore, is is difficult to obtain reliable results. In addition, the use of onlyone velocity curve or one set of travel-time curves for all stations of the network hinders accurate determinationof the location of earthquake hypocenters. In order to localize earthquake foci with high precision, it isalso necessary to have a sufficiently detailed representation of the structure of the Earth’s crust and uppermantle in the studied region. It is also desirable to take information about the structure of the region not fromearthquake data, but based on other observations, e.g., deep seismic sounding (DSS) data. Using seismologicalbulletins for 1970–2015, we have redetermined the hypocentral coordinates of crustal earthquakes in theCaucasus. The new distribution of crustal earthquake hypocenters in the Caucasus differs significantly fromthe old distribution obtained from the catalog. This may become the basis for refining ideas about the regionalgeodynamics.