Viscoelastic gravitational seismology.
IV - Geofisica e fisica dell'ambiente
GSSI Ex ISEF - Aula D - Mercoledì 25 h 10:00 - 13:00
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Solid Earth mass rearrangement and ocean water redistribution caused by great (magnitude 9) earthquakes are made visible by their gravity signatures, nowadays detectable by the Gravity Recovery And Climate Experiment space mission. This geodetic technique, once supplemented by a physico-mathematical model of the co- and post-seismic gravity signatures, offers a novel perspective to investigate fault slip and stress relaxation by viscous flow. Realistic simulations of the Next Generation of Gravity Mission by European Space Agency show that this possibility will be extended to moderate earthquakes, as the largest intraplate earthquakes occuring in Italy, down to magnitude 7.