Thermal Anomalies Around the Time of Nepal Earthquakes M 7.8 April 25, 2015 And M 7.3 May 12, 2015

Pranab Hazra, Syam Sundar De, Suman Paul, Gautam Guha and Abhijit Ghosh
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Pranab Hazra: Narula Institute of Technology, Kolkata, West Bengal, India
Syam Sundar De: Centre of Advanced Study in Radio Physics and Electronics, University of Calcutta, Kolkata, India
Suman Paul: Centre of Advanced Study in Radio Physics and Electronics, University of Calcutta, Kolkata, India
Gautam Guha: Centre of Advanced Study in Radio Physics and Electronics, University of Calcutta, Kolkata, India
Abhijit Ghosh: Centre of Advanced Study in Radio Physics and Electronics, University of Calcutta, Kolkata, India

International Journal of Geotechnical Earthquake Engineering (IJGEE), 2017, vol. 8, issue 1, 58-73

Abstract: Two consecutive large earthquakes having M values 7.8 and 7.3 occurred on April 25 and May 12, 2015, respectively at Nepal. During their occurrences, abrupt increase in greenhouse gases (like CO2, CH4, H2 etc.) and enhancement of radon emanations are found. These attain high momentum that introduce anomaly in the fluid expulsion from seismically active faults which produce air ionization before these large earthquakes. The process may be very much related to the latent heat release due to condensation of ionized aerosols, produced by energetic alpha particles from radon just before the earthquake. This probably introduces changes in the observed meteorological parameters in the region. Such variations may be due to siesmo tectonically induced radon anomaly before the earthquake.

Date: 2017
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