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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/6756
Title: Satellite detection of earthquake thermal infrared precursors in Iran
Authors: Saraf, Arun Kumar
Rawat V.
Banerjee P.
Choudhury S.
Panda S.K.
Dasgupta S.
Das, Josodhir D.
Published in: Natural Hazards
Abstract: Stress accumulated in rocks in tectonically active areas may manifest itself as electromagnetic radiation emission and temperature variation through a process of energy transformation. Land surface temperature (LST) changes before an impending earthquake can be detected with thermal infrared (TIR) sensors such as NOAA-AVHRR, Terra/Aqua-MODIS, etc. TIR anomalies produced by 10 recent earthquakes in Iran during the period of Jun 2002-Jun 2006 in the tectonically active belt have been studied using pre- and post-earthquake NOAA-AVHRR datasets. Data analysis revealed a transient TIR rise in LST ranging 2-13°C in and around epicentral areas. The thermal anomalies started developing about 1-10 days prior to the main event depending upon the magnitude and focal depth, and disappeared after the main shock. In the case of moderate earthquakes (<6 magnitude) a dual thermal peak instead of the single rise has been observed. This may lead us to understand that perhaps pre-event sporadic release of energy from stressed rocks leads to a reduction in magnitude of the main shock. This TIR temperature increment prior to an impending earthquake can be attributed to degassing from rocks under stress or to p-hole activation in the stressed rock volume and their further recombination at the rock-air interface. A precise correlation of LST maps of Bam and Zarand with InSAR-generated deformation maps also provides evidence that the thermal anomaly is a ground-related phenomenon, not an atmospheric one. © Springer Science+Business Media B.V. 2008.
Citation: Natural Hazards (2008), 47(1): 119-135
URI: https://doi.org/10.1007/s11069-007-9201-7
http://repository.iitr.ac.in/handle/123456789/6756
Issue Date: 2008
Keywords: Earthquake
Thermal infrared anomaly
ISSN: 0921030X
Author Scopus IDs: 7006460159
23467947400
23466131700
57198392507
55419719400
23466210100
7202105464
Author Affiliations: Saraf, A.K., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee 247667, India
Rawat, V., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee 247667, India
Banerjee, P., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee 247667, India
Choudhury, S., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee 247667, India, Wadia Institute of Himalayan Geology, Dehradun, India
Panda, S.K., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee 247667, India, Department of Earthquake Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India, Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United States
Dasgupta, S., Reliance Industries Ltd., Navi Mumbai, India
Das, J.D., Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee 247667, India, Department of Earthquake Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
Funding Details: Acknowledgement We are greatly indebted to the Department of Science and Technology (Seismology Division), New Delhi, for financial assistance.
Corresponding Author: Saraf, A.K.; Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee 247667, India; email: saraffes@iitr.ernet.in
Appears in Collections:Journal Publications [EQ]
Journal Publications [ES]

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