Satellite images have been essential for helping relief efforts in Japan following the massive quake that struck on 11 March. Now scientists are using ESA’s space radars to improve our understanding of tectonic events.
Scientists are calling on data from the advanced radar on ESA’s Envisat satellite to map surface deformations caused by the magnitude-9 earthquake. Studying data acquired on 19 February and 21 March, scientists from NASA’s Jet Propulsion Laboratory have detected a ground shift of about 2.5 m eastwards and a downward motion of Honshu Island’s east coast.
Scientists from Italy’s Istituto Nazionale di Geofisica e Vulcanologia have used the same Envisat data to show a large portion of the surface displacement, with a maximum shift of 2.5 m, according to the ESA.
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