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Monitoring of ULF (ultra-low-frequency) Geomagnetic Variations Associated with Earthquakes
ULF (ultra-low-frequency) electromagnetic emission is recently recognized as one of the most promising candidates for short-term earthquake prediction. This paper reviews previous convincing evidenceExpand
ULF electromagnetic precursors for an earthquake at Biak, Indonesia on February 17, 1996
ULF electromagnetic emissions associated with a large earthquake occurred at Biak Island, Indonesia at 5h 59m UT on February 17, 1996 (magnitude (Mw) = 8.2 and depth = 20 km from USGS catalog), haveExpand
Seismoionospheric GPS total electron content anomalies observed before the 12 May 2008 Mw7.9 Wenchuan earthquake
[1] The global ionospheric map (GIM) is used to observe variations in the total electron content (TEC) of the global positioning system (GPS) associated with 35 M ≥ 6.0 earthquakes that occurred inExpand
Ionospheric anomalies possibly associated with M ⩾ 6.0 earthquakes in the Japan area during 1998-2010: Case studies and statistical study
Abstract In this paper, we examine pre-earthquake ionospheric anomalies in time series and perform a statistical test by using total electron content (TEC) derived from global ionosphere maps (GIM)Expand
Electric and magnetic phenomena observed before the volcano-seismic activity in 2000 in the Izu Island Region, Japan
Significant anomalous changes in the ultra low frequency range (≈0.01 Hz) were observed in both geoelectric and geomagnetic fields before the major volcano-seismic activity in the Izu Island region,Expand
Statistical analysis of ULF seismomagnetic phenomena at Kakioka, Japan, during 2001–2010
To clarify and verify the ultralow frequency (ULF) seismomagnetic phenomena, we have performed statistical studies on the geomagnetic data observed at the Kakioka (KAK) station, Japan, duringExpand
ULF Geomagnetic Changes Associated with Large Earthquakes
Despite its extreme importance and years of effort, practical short-term earthquake prediction still remains to be seen. However, research in earthquake-related electromagnetic phenomena haveExpand
Near-seismic effects in ULF fields and seismo-acoustic emission: statistics and explanation
Abstract. Preseismic intensification of fracturing has been investigated from occurrence analysis of seismo-acoustic pulses (SA foreshocks) and ULF magnetic pulses (ULF foreshocks) observed inExpand
Anomalous behaviors of geomagnetic diurnal variations prior to the 2011 off the Pacific coast of Tohoku earthquake (Mw9.0)
There have been many reports on ultra-low-frequency (ULF) electromagnetic phenomena associated with earthquakes in a very wide frequency range. In this study, unusual behaviors of geomagnetic diurnalExpand
Co‐seismic geoelectric potential changes observed in Japan
Co-seismic signals of geoelectric potential have been observed for several earthquakes (EQs) in Japan. It has been argued that if there are precursory changes, stronger signals should be at the timeExpand