Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008geoji.173..802h&link_type=abstract
Geophysical Journal International, Volume 173, Issue 1, pp. 802-805.
Astronomy and Astrophysics
Astronomy
Numerical Solutions, Seismic Cycle, Time Variable Gravity, Earthquarke Interaction, Forecasting, And Prediction
Scientific paper
Gravity gradients are an effective method for delineating the extent of subsurface density anomalies. The change in subsurface density contrasts due to the seismic deformation gives rise to detectable gravity changes via the dilatational gravity signal or Bouguer anomaly. Solutions for the corresponding gravity gradients of these signals are developed for a vertical strike-slip fault. Gravity gradient solutions exhibit similar spatial distributions as those calculated for Coulomb stress changes, reflecting their physical relationship to the stress changes. The signals' magnitudes, of the order of 10-4E, are beyond the resolution of typical exploration instruments. Improvements to Superconducting Gravity Gradiometers are necessary for gravity gradients to be used as a viable method for the observation of the stress field changes over large spatial scales.
Fernandez Javier
Hayes Thomas J.
Rundle John B.
Tiampo Kristy F.
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