A Network of Superconducting Cravimeters Detects Submicrogal Coseismic Gravity Changes

摘要

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.