GEOPHYSICAL RESEARCH, 2016, vol.17, no.1, pp.46-55.
Abstract References Full text (in Russian) Full text (in English)
UDC 550.3:551.24.02
MONITORING OF THE TSUNAMIGENIC EARTHQUAKES BY MEANS OF SATELLITE GEODESY
©2016 I.A. Sdelnikova(1), G.M. Steblov(1,2)
(1) Geophysical Survey RAS, Obninsk, Kaluga reg., Russia
(2) Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia
Abstract. One of the practical measures to mitigate the consequences of the tsunami after recording the undersea earthquake is an early warning of the approaching wave and estimation of the tsunami risk, which requires the development of a hydrodynamic model of wave propagation. This model should include initial conditions in terms of the seafloor uplift amplitude due to the earthquake. The methods of satellite geodesy used to estimate coseismic displacements of the surface in the vicinity of the earthquake epicenter can be applied to estimate this uplift in near real time.
Based on the satellite geodetic data (GPS data) for the Kuril Islands and Japan, fault plane solutions are modeled for three strong seismic events in the Pacific region: two Simushir earthquakes 15.11.2006 (МW=8.3) and 13.01.2007 (МW=8.1) and the catastrophic Tohoku earthquake 11.03.2011 (МW=9.0). Patterns of vertical coseismic displacements of the seafloor are constructed for these events.
Keywords: tsunami, undersea earthquake, earthquake source, satellite geodesy, GPS data.
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