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← GeographyWhich risk increases when fluid injection lowers effective stress along a fault?
A)Induced seismicity events become larger✓
B)Elastic deformation withstands more stress
C)Aseismic creep becomes a faster slip
D)Fault gouge dramatically rises impermeability
💡 Explanation
Fault strength decreases, reducing the stress needed for rupture; this is due to the mechanism of effective stress reduction by pore fluid. Because less stress is required for the slip, stresses release abruptly into larger induced seismicity rather than aseismically, therefore, increasing magnitude.
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