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← GeographyWhich risk increases when groundwater extraction reduces pore pressure near a fault line experiencing tectonic stress?
A)Increase in triggered seismic events✓
B)Decreased fault creep rate
C)Increased stability of rock strata
D)Reduced magnitude of subsequent tremors
💡 Explanation
When groundwater extraction lowers pore pressure, effective stress on the fault increases because friction resisting fault slip rises, potentially triggering seismic events. Therefore, increased seismicity results rather than fault creep reduction, rock strata stabilization, or tremor magnitude reduction, all which necessitate altered stress conditions.
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