A Network of Superconducting Gravimeters Detects Submicrogal Coseismic Gravity Changes

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Science  15 Oct 2004:
Vol. 306, Issue 5695, pp. 476-478
DOI: 10.1126/science.1101875

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With high-resolution continuous gravity recordings from a regional network of superconducting gravimeters, we have detected permanent changes in gravity acceleration associated with a recent large earthquake. Detected changes in gravity acceleration are smaller than 10–8 meters seconds–2 (1 micro-Galileo, about 10–9 times the surface gravity acceleration) and agree with theoretical values calculated from a dislocation model. Superconducting gravimetry can contribute to the studies of secular gravity changes associated with tectonic processes.

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