Temporal variation of gravity field before and after Wenchuan Ms8. 0 earthquake

Microgravity surveying before, during and after distant large earthquakes

“…Recent use of gravity measurements, with respect to earthquakes, has been focused on future earthquake prediction by identifying which ancient faults are under stress and most likely to be active (Levandowski et al, 2017), and tracing changes in mass distribution (Barnes, 1966;Yiqing et al, 2011), the progression of fault movements using satellite measurements (De Viron et al, 2008;Grocholski, 2018), and developing early warning systems using the instantaneous gravity signal (Zhu and Zhan, 2012;Montagner et al, 2016). Much less attention has been given to the effects of the resulting seismic accelerations on the accuracy of field measurements in typical microgravity surveys, particularly with commercially viable measurement times.…”