Title :
VLF radio signal anomalies associated with strong earthquakes
Author :
Zhima, Z. ; Zhang XueMin ; Shen XuHui ; Sun Weihuai ; Ning DongMei ; Ruzhin, Yuri
Author_Institution :
Inst. of Earthquake Sci., China Earthquake Adm., Beijing, China
Abstract :
The VLF (Very Low Frequency) radio signal receiving network of Russian Alpha radio navigation system has been established in China since 2010. We applied a quartile-based method to study the variations of VLF signal propagation before the M≥6.0 shallow earthquakes in the network. Results found that possible anomalies occurred around the two strong earthquakes, 2010 M7.1 Yushu and 2013 M7.0 Lushan earthquake, respectively. For earthquakes with magnitude 5.0≥M≥7.0, such anomalies are not detected. Preliminary statistical analysis with Dst and Kp indices show that there exists a good correlation between geomagnetic storms and VLF propagation anomaly.
Keywords :
atmospheric electromagnetic wave propagation; earthquakes; geophysical signal processing; magnetic storms; radionavigation; radiowave propagation; statistical analysis; China; Dst index; Kp index; Lushan earthquake; Russian Alpha radio navigation system; VLF propagation anomaly; VLF radio signal anomalies; VLF signal propagation variations; Yushu earthquake; geomagnetic storms; quartile-based method; shallow earthquakes; statistical analysis; strong earthquakes; very low frequency radio signal receiving network; Artificial intelligence; Cities and towns; Earthquakes; Ionosphere; Radio transmitters; Receivers;
Conference_Titel :
General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI
Conference_Location :
Beijing
DOI :
10.1109/URSIGASS.2014.6929815
