Figure 2
From: Large extensional earthquakes push-up terrific amount of fluids
Map of Vp/Vs at 2 and 4 km depth for EPOCHA (a) and EPOCHC (b). Purple lines are the limit of the resolved volume. The box of the fault (plotted in Fig. 4) is shown, with epicenters at + /− 1 km from the layer and the mainshock epicenter. The traces of the vertical sections are indicated. Vertical sections across the 2009 fault of Vp/Vs for the three distinct epochs (c–e). Section e in EPOCHC is drawn 4 km south of sections c and d to capture the most significant time change of Vp/Vs, since the migration occurred both along strike and upward. Aftershocks identify the fault geometry at depth. The well resolved volume is indicated by the thin purple curves.The zones with pronounced anomalies are encircled, showing a first Vp/Vs decrease and a progressive increase of Vp/Vs at shallower depths. Figure has been done with Generic Mapping Tool software, https://www.generic-mapping-tools.org/.
