7 October 2009 Satellite and geophysical data for earthquake precursors assessment
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Abstract
Space-based observations, coupled with surface in-situ observations where available, can enable scientists to survey large surface areas for precursory signals, allowing the monitoring of broad areas of the surface of the earth where strong earthquakes can be expected to occur. The aim of this paper was to identify several types of earthquake precursors that might be observed from space. Satellite multispectral and hyperspectral imagery can look for specific gases and elements at the earth's surface, and it can also be used to detect surface temperature anomalies, geologic lineaments and analysis of active seismic faults. For seismic hazard analysis in Vrancea area, Romania have been selected the earthquake precursors detectable from space which can also be observed by ground-based monitoring experiments: surface deformation provided by GPS and SAR imaging, land surface temperature changes as possible precursors provided by ASTER, Landsat TM and ETM, electromagnetic and ionospheric anomalies, radon gas emissions in the faults areas prior to earthquakes, as well as seismicity. As Vrancea area has a significant regional tectonic activity in Romania and Europe, the joint analysis of geospatial and in-situ geophysical information is revealing new insights in the field of hazard assessment.
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M. A. Zoran, M. A. Zoran, } "Satellite and geophysical data for earthquake precursors assessment", Proc. SPIE 7478, Remote Sensing for Environmental Monitoring, GIS Applications, and Geology IX, 74782L (7 October 2009); doi: 10.1117/12.830564; https://doi.org/10.1117/12.830564
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