Investigation of earthquake magnitude effect on generation of wave disturbances in the ionosphere

Recent news

Method and algorithm for analysis of cosmic ray signals in the problems of anomaly detection

Apr 11, 2024

Hybrid Model of Natural Time Series with Neural Network Component and Adaptive Nonlinear Scheme: Application for Anomaly Detection

Apr 9, 2024

Elements of the decision theory. Application in the problem of natural data analysis

Apr 4, 2024

Investigation of earthquake magnitude effect on generation of wave disturbances in the ionosphere

Perevalova N.P.¹, Sankov V.A.², Astafyeva E.I.³, Zhupityaeva А.S.⁴

Institute of Solar-Terrestrial Physics SB RAS, Russia
Institute of the Earth's Crust SB RAS, Russia
Institut de Physique du Globe de Paris, Paris, France [18]$^4$ Irkutsk State University, Russia
Zhupityaeva А.S.[14]$^4$

   Analysis of earthquake magnitude (Mw) effect on the probability of
   occurrence of wave disturbances in the ionosphere have been carried out.
   The analysis was based on the measurements of total electron content (TEC)
   variations from ground-based GPS stations located near epicenters. 21
   earthquakes with magnitudes of 4.1-9.0 registered in the Baikal region,
   Japan, Europe, Salvador, Sumatra in 1999-2012 have been investigated. The
   TEC wave disturbances caused by strong earthquakes with magnitude
   7.1-9.0are registered reliably which allows us to calculate their
   characteristics and movement parameters. There is a tendency for the
   increase of TEC response average amplitude to strong earthquakes with the
   increase of magnitude. TEC disturbances associated with 6.6-6.7-magnitude
   earthquakes are difficult to pick out at the level of background
   fluctuations. These TEC disturbances are registered at several
   receiver-satellite ray paths and have small amplitudes. It has been noted,
   that for earthquakes with Mw>6.5 the focal mechanism also has an effect on
   the generation and intensity of wave disturbances in the ionosphere. The
   4.1.0-6.3-magnitude earthquakes did not cause noticeable responses in the
   TEC behavior. The results obtained and data from other researchers allow
   us to consider Mw=6.5 as threshold of magnitude below which there are no
   pronounced earthquake-induced TEC wave disturbances.

   The work was supported by the SB RAS interdisciplinary collaboration
   project N11, the Russian Foundation for Basic Research (grant
   12-05-33032), and the RF Ministry of Education and Science (projects
   N8699, N8388, N14.518.11.7065).