Studies on the influence of large earthquakes (M>7) upon 9 kHz sferics recorded from Kolkata

Studies on the influence of large earthquakes (M>7) upon 9 kHz sferics recorded from Kolkata
Author(s):
Dr. S. Barui
Keywords:
Earthquake, ionospheric perturbation, precursory effects, seismo-eletromagnetism.
Abstract
The outcome of the analyses of some significant observations in the records of VLF sferics over Kolkata (Lat. 22.56º N, Long. 88.5º E) at 9 kHz during the occurrences of large earthquake on August 14, 2021 will be presented here. Discrete spike-type signals are obtained as the precursors of this earthquake with magnitude M>7. The number of spikes and their intensities are found to vary irregularly and reached their maximum value on the day of occurrence. It then decreases gradually and finally ceased.
Article Details
Unique Paper ID: 152820 Publication Volume & Issue: Volume 8, Issue 4 Page(s): 555 - 558
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