E3S Web Conf.
Volume 333, 2021Regional Problems of Earth Remote Sensing (RPERS 2021)
|Number of page(s)||5|
|Section||Monitoring of the Environment, Natural and Anthropogenic Objects and Phenomena|
|Published online||21 December 2021|
Refinement of parameters gravitational anomaly relative to the focal zone of the 2011 earthquake (Japan) based on satellite data
1 Siberian Federal University, 79 Svobodny pr., 660041, Krasnoyarsk, Russia
2 Institute of Computational Modeling SB RAS, 50/44 Akademgorodok, 660036, Krasnoyarsk, Russia
3 Federal Research Centre “KSC SB RAS”, 50 Akademgorodok, 660036, Krasnoyarsk, Russia
* Corresponding author: email@example.com
The aim of this work is to study gravitational anomalies that have arisen in the region of the sources of strong underwater earthquakes with a magnitude of Mw > 8. For this purpose, data obtained by the GRACE space system were used. Variations of the EWH program with a period of 30 days were investigated relative to the focal area of the 2011 Japanese earthquake for the period 2010-2012. It was found that during the preparation of an earthquake, the EWH values significantly increase in this area for three months, with aftershock activity, the EWH values decrease within a month. Maps of variations of the EWH parameter in the conditions of a disturbed geomedia and in background seismic conditions are constructed. The indices of the anomaly δEWH were calculated, which made it possible to analyze in more detail the local gravitational field for the investigated focal zone.
© The Authors, published by EDP Sciences, 2021
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