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Coseismic Deformation Studies Using GRACE and GOCE

C.K. Shum(1), Shin-Chan Han(1) and Chung-Yen Kuo(2)

(1) Ohio State University, 125 S Oval Mall, Columbus, Ohio 43210, United States
(2) National Cheng Kung University, 1 University Road, Tainan, Taiwan

Abstract

Satellite gravimetry in GRACE and gradiometry in GOCE are distinctly different measurement types with GRACE primarily more accurate in the long-wavelength and GOCE more accurate in the high-frequency components of the gravity field. It has been demonstrated that GRACE is capable of observing coseismic deformation in the form of gravity changes (primarily crust density change) of a large undersea subduction earthquake (the Great 26 December 2004 Sumatra-Andaman earthquake, Mw=9.3). This paper provides a study of the feasibility of GOCE gravity gradient tensor measurements to be able to observe coeismic deformation of earthquakes potentially of significantly smaller earthquakes than the Sumatra-Andaman earthquake.

 

Workshop presentation

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry