Which outcome occurs when rapid water injection into a fracture zone within a geothermal reservoir triggers numerous small earthquakes?

💡 Explanation

Enhanced geothermal systems use hydraulic fracturing to increase permeability in low-permeability rocks; this manipulates effective stress, causing increased seismicity that increases yield, because pore pressure diffusion alters the shear strength, therefore the efficiency increases, rather than options B, C, or D which are unrelated triggers.

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