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Investigation of satellite thermal IR and atmospheric radon anomalies recorded for some moderate earthquakes in Vrancea geotectonic active area
Author(s): Maria A. Zoran; Roxana S. Savastru; Dan M. Savastru
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Paper Abstract

The earth crust suffers a variety of geophysical changes, which produce presignals of impending earthquakes. The coupling model lithosphere–surfacesphere-atmosphere–ionosphere provides a comprehensive mechanism to explain key involved geophysical processes. Space-time anomalies of several seismic precursors detected in multitemporal and multiresolution satellite data or in situ monitoring of radon gas emitted from soil near the ground air weeks to days in the Vrancea epicentral area can be associated with the strain stress changes that occurred before the occurrence of moderate and strong earthquakes. This paper investigated seismic precursors during 2012-2017 period over Vrancea seismogenic region in Romania through analysis of NOAA AVHRR and MODIS Terra/Aqua Thermal Infrared data of key geophysical parameters (Land Surface Temperature -LST, and Air Temperature AT) and atmospheric radon concentration recorded at Plostina seismic station in Vrancea zone and Bucharest using solid state nuclear track detectors (SSNTD) CR-39 radon monitors before some moderate earthquakes. Multi-parameter data have been computed based on multi-year background data for anomalies detection. Results indicate significant transient variations in observed parameters before the main events. Space-time anomalies of several seismic precursors detected in time series satellite data or in situ monitoring of radon gas emitted from soil near the ground air weeks to days in the Vrancea epicentral area can be associated with the strain stress changes that occurred before the occurrence of moderate and strong earthquakes. This research is valuable for identifying earthquake presignals in earthquake prone areas.

Paper Details

Date Published: 27 June 2019
PDF: 11 pages
Proc. SPIE 11174, Seventh International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2019), 111740U (27 June 2019); doi: 10.1117/12.2532255
Show Author Affiliations
Maria A. Zoran, National Institute of Research and Development for Optoelectronics (Romania)
Roxana S. Savastru, National Institute of Research and Development for Optoelectronics (Romania)
Dan M. Savastru, National Institute of Research and Development for Optoelectronics (Romania)


Published in SPIE Proceedings Vol. 11174:
Seventh International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2019)
Kyriacos Themistocleous; Giorgos Papadavid; Silas Michaelides; Vincent Ambrosia; Diofantos G. Hadjimitsis, Editor(s)

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