Seismic Structure of Local Crustal Earthquakes beneath the Zipingpu Reservoir of Longmenshan Fault Zone

Figure 4

Results of checkerboard resolution test. Open and closed circles denote slow and fast velocities, respectively. The depth of each layer is shown at the upper part of the map. The grid spacing is 2 km in the horizontal direction and 1 km in depth. The perturbation scale is shown on the right. The coordinates are in km.

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