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1 IPE - Schmidt Institute of Physics of the Earth Moscow 2 High School and Science Programme Brandenburg-Potsdam 3 LPCE - Laboratoire de physique et chimie de l-environnement 4 Inst. of Cosmophysical Research and Radio Wave Propagation

Abstract : In the present work, phenomena in the ionosphere are studied, which are connected with earthquakes 16 events having a depth of less than 50 km and a magnitude M larger than 4. Analysed are night-time Es-spread effects using data of the vertical sounding station Petropavlovsk-Kamchatsky f=53.0°, ?=158.7° from May 2004 until August 2004 registered every 15 min. It is found that the maximum distance of the earthquake from the sounding station, where pre-seismic phenomena are yet observable, depends on the magnitude of the earthquake. Further it is shown that 1–2 days before the earthquakes, in the pre-midnight hours, the appearance of Es-spread increases. With a probability of more than 0.95, this increase of Es-spread observations before midnight is not casual.





Autor: E. V. Liperovskaya - C.-V. Meister - O. A. Pokhotelov - M. Parrot - V. V. Bogdanov - N. E. Vasil-Eva -

Fuente: https://hal.archives-ouvertes.fr/



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