[HTML][HTML] Anomalous behaviors of geomagnetic diurnal variations prior to the 2011 off the Pacific coast of Tohoku earthquake (Mw9. 0)

G Xu, P Han, Q Huang, K Hattori, F Febriani… - Journal of Asian Earth …, 2013 - Elsevier
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 …

Statistical analysis of ULF seismomagnetic phenomena at Kakioka, Japan, during 2001–2010

P Han, K Hattori, M Hirokawa, J Zhuang… - Journal of …, 2014 - Wiley Online Library
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 …

Spatiotemporal characteristics of the geomagnetic diurnal variation anomalies prior to the 2011 Tohoku earthquake (Mw 9.0) and the possible coupling of multiple pre …

P Han, K Hattori, Q Huang, S Hirooka… - Journal of Asian Earth …, 2016 - Elsevier
Abstract Xu et al.(2013) and Han et al.(2015) have reported unusual behaviors of
geomagnetic diurnal variation (GDV) in the vertical component prior to the 2011 off the …

Further investigations of geomagnetic diurnal variations associated with the 2011 off the Pacific coast of Tohoku earthquake (Mw 9.0)

P Han, K Hattori, G Xu, R Ashida, CH Chen… - Journal of Asian Earth …, 2015 - Elsevier
As one of the most promising candidates for short-term earthquake forecasting, the seismo-
electromagnetic phenomena have been intensively studied for several decades. Recently …

Assessing the potential earthquake precursory information in ULF magnetic data recorded in Kanto, Japan during 2000–2010: Distance and magnitude dependences

P Han, J Zhuang, K Hattori, CH Chen, F Febriani… - Entropy, 2020 - mdpi.com
In order to clarify ultra-low-frequency (ULF) seismomagnetic phenomena, a sensitive
geomagnetic network was installed in Kanto, Japan since 2000. In previous studies, we …

Assessment of signal processing methods for geomagnetic precursor of the 2012 M6. 9 Visayas, Philippines earthquake

KA Yusof, NS Abdul Hamid, M Abdullah, S Ahadi… - Acta Geophysica, 2019 - Springer
This study assessed two signal processing methods on geomagnetic data to detect
precursory signals appearing before the M6. 9 Visayas, Philippines earthquake on 6 …

Simultaneous electric, magnetic and ULF anomalies associated with moderate earthquakes in Kumaun Himalaya

J Bulusu, K Arora, S Singh, A Edara - Natural Hazards, 2023 - Springer
Variations in electric and magnetic (EM) fields were examined at two sites: Dhanachuli near
the Main Boundary Thrust (MBT) and Patiyasar near the Main Central Thrust (MCT) in …

Evaluation of seismo-electric anomalies using magnetic data in Taiwan

CH Chen, HL Hsu, S Wen, TK Yeh… - … Hazards and Earth …, 2013 - nhess.copernicus.org
The Parkinson vectors derived from 3-component geomagnetic data via the magnetic
transfer function are discussed with respect to epicentre locations and hypocentre depths of …

Ultra low frequency (ULF) electromagnetic anomalies associated with large earthquakes in Java Island, Indonesia by using wavelet transform and detrended …

F Febriani, P Han, C Yoshino, K Hattori… - … Hazards and Earth …, 2014 - nhess.copernicus.org
Indonesia is one of the most seismically active regions in the world and mitigation of seismic
hazard is important. It is reported that Ultra low frequency (ULF) geomagnetic anomalies are …

Anomalous frequency characteristics of groundwater level before major earthquakes in Taiwan

CH Chen, CH Wang, S Wen, TK Yeh… - Hydrology and Earth …, 2013 - hess.copernicus.org
Unusual decreases of water levels were consistently observed in 78%(= 42/54) of wells in
the Choshuichi Alluvial Fan of central Taiwan about 250 days before the Chi-Chi earthquake …