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← GeographyWhich risk significantly increases when excessive groundwater extraction precedes seismic activity?
A)Decreased surface wave earthquake intensity
B)Triggering reactivation of dormant volcanoes
C)Heightened earthquake acceleration exceedance probability✓
D)Significant liquefaction of clay soil mixture
💡 Explanation
Excessive groundwater extraction increases pore pressure changes; therefore, Coulomb stress transfer can trigger increased fault slip, leading to a heightened earthquake acceleration exceedance probability, because faults are already stressed. This is Coulomb stress transfer, rather than liquefaction, which relates to soil stability.
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