Inferring Hydraulic Pressure Changes from Induced Seismicity Observations: Three Showcases from Geothermal Reservoirs

Figure 7

(a) Hypocentre locations of the seismicity induced during the 2005 restimulation of well Habanero#1 (red star) in map view [15]. Each seismic event is displayed by a globe scaled to the event magnitude. Colour encoding denotes occurrence time according to the legend. Seismic activity associated with the initial stimulation of well Habanero#1 in 2003 [19] is indicated by grey dots. Contour line indicates 2003 seismicity. (b) Absolute hypocentre locations in perspective view with best-fitting plane determined by linear regression. (c) Earthquake source-centred, stereographic projection (lower hemisphere) of -wave polarity data of the dominating type 1 events, see [15]. Beachball indicates compound fault plane solution. Coordinates are given with respect to the top of Habanero#1 (27.81639°S/140.75972°E).

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