Spatiotemporal Relationship between Geodetic and Seismic Quantities: A Possible Clue to Preparatory Processes of M ≥ 6.0 Inland Earthquakes in Japan
(a) Schematic explanation on the method of obtaining geodetic quantities (dilatation rate and maximum shear strain rate) and seismic quantities (seismic energy and number of earthquakes) for each grid, which were calculated by relating them to the displacement rates for GPS stations (open triangle) and the magnitudes for hypocenters (open circle) in circular area, respectively. We weighted the observation errors for GPS stations and seismic quantities for hypocenters depending on the distances between the calculation grid (black square) and the other grids in circular area, respectively. The vertical axis of each right figure in which weight curve is delineated shows the distances relative to the calculation grid. (b) Schematic explanation on the approach of obtaining Figures 3 and 4. See also text for detail.
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