Figure 9
From: Automated microseismic event location using Master-Event Waveform Stacking

Coherence matrices of a sample event obtained using the standard WS (a), the master-event WS (b) and multi master-event WS (c) location methods. The coherence matrix XY is obtained by projecting, for each point (X, Y), its maximum along the Z directions (coherence matrices XZ and YZ are obtained in a similar way). Coherence values are represented in colour scale. The reference point (X, Y) = (0, 0) corresponds with the point (lat(deg) = 50.1696; lon(deg) = 12.4098) in the geographical coordinates system.