Articles | Volume 8, issue 4
Nat. Hazards Earth Syst. Sci., 8, 745–749, 2008
https://doi.org/10.5194/nhess-8-745-2008

Special issue: Earthquakes precursors and seismic hazard

Nat. Hazards Earth Syst. Sci., 8, 745–749, 2008
https://doi.org/10.5194/nhess-8-745-2008

  25 Jul 2008

25 Jul 2008

Association of the negative anomalies of the quasistatic electric field in atmosphere with Kamchatka seismicity

S. Smirnov S. Smirnov
  • Institute of Cosmophysical Research and Radio Wave Propagation of the Far-Eastern Branch of Russian Academy of Science, Kamchatka region, Paratunka, Russia

Abstract. One hundred three cases of a bay-like depression in the strength of the Ez component of the quasistatic electric field in the near-Earth atmosphere, observed from 1997 to 2002 on Kamchatka, have been analyzed statistically. It has been shown that the most probable length of a bay is 40–60 min. The most probable drops in Ez are minus 106–300 V/m. The dependence of these values on an earthquake class and a distance to the epicenter was not found. The probability of earthquake prediction over 24 h before an earthquake based on the Ez anomaly is 36%.

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