DOUBLE EARTHQUAKES, THEIR NATURE AND FORECAST BY THE METHOD OF SEISMIC ENTROPY

S.Ts. Akopian

Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia

Abstract. Double earthquakes are strong earthquakes close in time, place and magnitude. This is quite rare and difficult to explain events. Elucidation of the nature of their occurrence is important for forecasting. The method of seismic entropy, involving the results of studies of processes in the sources of strong earthquakes by other methods, allows to identify the nature of such earthquakes, to determine them as independent earthquakes with a specific tectonic relationship, to distinguish them from other cases of close but independent earthquakes, as well as to distinguish them against the background of foreshocks and aftershocks. Double earthquakes identified in the seismic systems located in different seismotectonic situations in the Altai, in the Kuril Islands, in the Central United States, but indeed their "homeland" is Pakistan. Characteristic features on which their classification is carried out are studied.

Keywords: kinematic model, track diagram, seismic entropy, instability analysis, seismicity monitoring

About the author

AKOPIAN Samvel Tsolakovich – Doctor of Physical and Mathematical Sciences, Chief Researcher. Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences. 123242, Moscow, ul. Bolshaya Gruzinskaya, 10, building 1. Phone: (499) 254-90-95. E-mail: sakopian@yandex.ru

Cite this article as: Akopian S.Ts. Double earthquakes, their nature and forecast by the method of seismic entropy, Voprosy Inzhenernoi Seismologii (Problems of Engineering Seismology), 2018, Vol. 45, No. 2, pp. 33–46. [in Russian]. DOI: 10.21455/VIS2018.2-3

English translation of the article will be published in Seismic Instruments, ISSN: 0747-9239 (Print) 1934-7871 (Online), https://link.springer.com/journal/11990), 2019, Volume 55, Issue 2.