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Earth, Planets and Space
Fig. 1 | Earth, Planets and Space

Fig. 1

From: Triggering processes of microseismic events associated with water injection in Okuaizu Geothermal Field, Japan

Fig. 1

Injection rate and hypocenter maps for microseismic events. a Injection rate of water. The horizontal axis shows the number of days from the start of injection; b–d hypocenter maps for b before the start of injection (Phase 1), c during injection (Phase 2), and d after the end of injection (Phase 3). The red and white triangles mark seismic stations on and below the surface, respectively. The green line shows the trace of the injected well (Test Well); the blue circles show the injection points

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