سال انتشار: ۱۳۹۰

محل انتشار: ششمین کنفرانس بین المللی زلزله شناسی و مهندسی زلزله

تعداد صفحات: ۸

نویسنده(ها):

M Akhoondzadeh – Remote Sensing Division, Surveying and Geomatics Engineering Department, School of Engineering,University of Tehran, Iran,
M.R. Saradjian – Remote Sensing Division, Surveying and Geomatics Engineering Department, School of Engineering,University of Tehran, Iran
M Parrot – Laboratoire de Physique et Chimie de l’Environnement et de l’Espace (LPCE)/CNRS, Orléans, France

چکیده:

Using ICE (Instrument Champ Electrique) and IMSC (Instrument Magnetic Search Coil) experiments onboard the DEMETER (Detection of Electromagnetic Emissions Transmitted from Earthquake Regions) satellite we have surveyed possible variations in electromagnetic signals transmitted by the ground-based VLF transmitter NPM in Hawaii and in HF plasma waves close to the Samoa earthquake during the seismic activity. The indices Dst and Kp were used to distinguish pre-earthquake anomalies from the other anomalies related to the geomagnetic activities. The lack of significant geomagnetic activities indicates that these anomalous behaviors could be regarded as seismo-ionospheric precursors. It is also shown that comparative analysis is more effective in seismo-ionospheric studies.