Seismic instruments: article

Identification of linear formations in the structure of seismicity by calculating the scalar products of the pairs of seismic events closest in time
A.A. Lukk
Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
Journal: Seismic instruments
Tome: 58
Number: 3
Year: 2022
Pages: 61-77
UDK: 550.34
DOI: 10.21455/si2022.3-4
Keywords: earthquake epicenters, linear formations, scalar product, earthquake chains, earthquake catalogs
Аnnotation: A method is proposed for calculating scalar products of pairs of seismic events closest in time to isolate se-quences of epicenters of crustal earthquakes (“chains”) connected in space and time. To verify the developed methodology, the model and real catalogs of earthquakes of the Garm district in Tajikistan are compared. The efficiency of the proposed algorithm is shown. Based on the totality of the obtained results of the allocation of “chains”, the reasons complicating the detection of the mentioned structures in the general case are considered. In the process of applying the created program to the real catalog of earthquakes of the Garm region, the existence of four pairwise orthogonal prevailing directions in their orientation was established. There were also some changes in the time of the predominant role of the selected strike chains of earthquake epicenters. It is possible that these changes may reflect some elements of the dynamics of the seismic process in the Garm region.