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← GeographyWhich risk increases when a megathrust earthquake stalls?
A)Delayed tsunami arrival times locally
B)Increased geyser activity significantly inland
C)Elevated aftershock magnitude and frequency✓
D)Anomalous increase in coastal erosion rates
💡 Explanation
Elevated aftershock magnitude and frequency occurs because fault locking impedes stress release along the rupture surface, therefore aftershocks redistribute remaining stress rather than the main rupture propagating fully. Other answers are not direct consequences.
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