Indian Journal of Radio & Space Physics

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Ionospheric responses to the consecutive earthquakes over Canadian sector


Affiliations
1 Centre for Geotechnology, Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli, Tamil Nadu 627 012, India
2 Equatorial Geophysical Research Laboratory, Indian Institute of Geomagnetism, Krishnapuram, Tirunelveli, Tamil Nadu 627 011, India
 

Recently, two successive earthquakes with the magnitude of 6.8 and 6.5 which have occurred at 200 km southwest of Port Hardy, Canada (49°N, 129°W) during October 2018 have been considered for our study. The TEC data has been acquired from nearby stations of these two events. It has been observed that an increase in TEC anomalies of about 0.1 TECU of moderate earthquake events occurred on the geo-magnetically quiet days. Besides, increases in the TEC anomalies have shown wave-like structures in the ionosphere and it may have associated with acoustic waves generated by earthquakes. The faulting mechanism of the earthquake and the propagation velocity of waves by TEC have confirmed the presence of acoustic wave activity.



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  • Ionospheric responses to the consecutive earthquakes over Canadian sector

Abstract Views: 117  |  PDF Views: 82

Authors

Emperumal Karthikeyan
Centre for Geotechnology, Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli, Tamil Nadu 627 012, India
Yasala Srinivas
Centre for Geotechnology, Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli, Tamil Nadu 627 012, India
Kaliappan Emperumal
Equatorial Geophysical Research Laboratory, Indian Institute of Geomagnetism, Krishnapuram, Tirunelveli, Tamil Nadu 627 011, India
Sundararaman Sathishkumar
Equatorial Geophysical Research Laboratory, Indian Institute of Geomagnetism, Krishnapuram, Tirunelveli, Tamil Nadu 627 011, India

Abstract


Recently, two successive earthquakes with the magnitude of 6.8 and 6.5 which have occurred at 200 km southwest of Port Hardy, Canada (49°N, 129°W) during October 2018 have been considered for our study. The TEC data has been acquired from nearby stations of these two events. It has been observed that an increase in TEC anomalies of about 0.1 TECU of moderate earthquake events occurred on the geo-magnetically quiet days. Besides, increases in the TEC anomalies have shown wave-like structures in the ionosphere and it may have associated with acoustic waves generated by earthquakes. The faulting mechanism of the earthquake and the propagation velocity of waves by TEC have confirmed the presence of acoustic wave activity.