Title :
Studies of seismo-ionospheric correlations using anomalies in phase of very low frequency signal
Author :
Pal, Parama ; Sasmal, Sudipta ; Chakrabarti, Sandip K.
Author_Institution :
Indian Centre for Space Phys., Kolkata, India
Abstract :
It is long thought that the ionosphere is perturbed by seismic activities and these perturbations can be detected by probing the ionosphere with Very Low Frequency signal. We have analyzed the VLF phase data of NWC-IERC baseline in the year for 2011 and calculated the VLF day length using the sunrise and sunset terminator time in the phase. In this paper we present the cross correlation between VLF day-length and magnitude seismic activities. It is found that VLF day-length changed significantly before two days prior to the earthquakes.
Keywords :
earthquakes; ionospheric electromagnetic wave propagation; seismology; AD 2011; NWC-IERC baseline; VLF day length calculation; VLF day-length changed; VLF day-length cross correlation; VLF magnitude seismic activity; VLF phase data; earthquake; ionosphere perturbation; ionosphere probing; seismo-ionospheric correlation study; sunrise terminator time; sunset terminator time; very low frequency signal phase anomaly; Correlation; Earth; Earthquakes; Fasteners; Hazards; Ionosphere; Transmitters;
Conference_Titel :
General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI
Conference_Location :
Beijing
DOI :
10.1109/URSIGASS.2014.6929821
