A comment on “Once more about the deep Caucasus
earthquakes”
by A.A. Godzikovskaya
V.Yu. Burmin
Schmidt Institute of Physics of the Earth, Russian Academy
of Sciences, Moscow, Russia
Abstract. In 2016 V.Yu. Burmin and co-authors published the results of a new
interpretation of the seismological bulletins data for the territory of
Armenia. A thorough check and rejection of the original data were performed and
an original author’s earthquake location algorithm was used. The algorithm is
based on minimizing the distance functional between points (X, Y, H) and (x, y, h)
corresponding to theoretical and observation of the time of the seismic wave
run from the source of earthquakes to the stations. As a result, it was found
that in addition to crustal earthquakes, deep earthquakes with a depth of up to
300 km also occur in the region. This non-trivial result has caused
objections from some seismologists. They are given in the article A.A. Godzikovskaya, published in this issue of the journal. In
this article we discuss the objections by A.A. Godzikovskaya.
One of the main arguments of A.A. Godzikovskaya is
based on the form difference in records of deep and crustal earthquakes. But
the record form depends not only on the source depth, but also on the velocity
structure of the medium and the earthquake mechanism, which determines the
radiation pattern of seismic energy from the source, as well as the duration of
the faulting process. The question of what record form of seismic waves from
the earthquake sources of different mechanisms and depths is typical for a
given region requires special study.
Keywords: hypocenter, algorithm, deep earthquakes, Caucasus.
About the author
BURMIN Valery Yurievich — Dr.
of Ph. & Math, chief research scientist, Schmidt Institute of Physics
of the Earth, Russian Academy of Sciences. 123242, Moscow, ul. Bolshaya Gruzinskaya 10, stroenie 1. Tel.: +7 (499) 254-68-95. E-mail: burmin@ifz.ru
Cite this article as: Burmin V.Yu. A comment
on «Once more about the deep Caucasus earthquakes» by A.A. Godzikovskaya, Voprosy Inzhenernoi Seismologii (Problems
of Engineering Seismology). 2017. Vol. 44, No. 3, pp. 95–102. DOI:
10.21455/VIS2017.3-6 [in Russian].
English translation of the article will be published
in Seismic Instruments, ISSN: 0747-9239
(Print) 1934-7871 (Online), https://link.springer.com/journal/11990), 2018, Volume 54, Issue 3.