Live Quiz Arena
🎁 1 Free Round Daily
⚡ Enter ArenaQuestion
← GeographyWhich outcome results following significant foreshock activity before the main earthquake?
A)Increased seismic hazard assessment confidence
B)Reduced magnitude of induced ground motion
C)Decreased rupture propagation distance afterward
D)Elevated risk of mainshock rupture extent✓
💡 Explanation
Greater foreshock activity indicates increased tectonic stress accumulation, leading to an elevated risk of larger rupture extent due to the Cascade Effect, because initial ruptures weaken adjacent zones. Therefore, a larger mainshock becomes more likely, rather than a smaller one under these conditions.
🏆 Up to £1,000 monthly prize pool
Ready for the live challenge? Join the next global round now.
*Terms apply. Skill-based competition.
Related Questions
Browse Geography →- Which mechanism increases flood extent past a levee during a prolonged river flood?
- Which effect promotes plankton blooms when coastal upwelling transports deep water towards the surface?
- Which phenomenon limits vertical building construction along the San Andreas Fault?
- Which mechanism maintains the consistent latitudinal boundaries of Hadley cells despite seasonal insolation changes?
- Which hazard increases on coastal sediment dunes when vegetation removal occurs?
- Which weathering outcome occurs with increased cryostatic limits in soils?
