TITLE:
Variations of VLF radio signals and atmospherics during the deep earthquake with M = 8.2 occurred on 24 May 2013 near Kamchatka peninsula
AUTHORS:
Viktor A. Mullayarov, Gennady I. Druzhin, Vyacheslav V. Argunov, Larisa M. Abzaletdinova, Aleksander N. Mel’nikov
KEYWORDS:
Earthquake; Precursor; Ionosphere; Atmospherics; Radio Signals
JOURNAL NAME:
Natural Science,
Vol.6 No.3,
February
26,
2014
ABSTRACT:
To detect seismic disturbances in the lower ionosphere,
we have used the signals of very-lowfrequency radio transmitters and natural
radio signals—electromagnetic emission of lightning discharges—atmospherics. On
earlier results of observation of atmospherics, it was obtained that the
earthquake effects are displayed as weight-hourly amplitude increases on the
day of event or within 3 days after them. Possible earthquake precursors are
also manifested as one-day (within one to several hours) increases in the
amplitude of atmospherics on average 5 - 12 days before the event. Analysis
shows that seismic effects in the amplitude of atmospherics have been observed
in the case of sufficiently strong (magnitude M > 4.5) and not very deep
(usually no deeper than 50 km) earthquakes. The effects of the events of the
earthquake with magnitude of 8.2 occurring in the Sea of Okhotsk on 24.05.13
not far from the Kamchatka Peninsula at a depth of 609 km considered in this
work have shown that even deep earthquakes may have precursors in the form of
disturbances in the lower ionosphere.