US west coast faults could trigger catastrophic back-to-back earthquakes, study finds

The GuardianThursday, October 9, 2025 at 11:00:23 AM
US west coast faults could trigger catastrophic back-to-back earthquakes, study finds
A recent study has raised alarms about the potential for catastrophic back-to-back earthquakes on the US west coast. It suggests that a high-magnitude quake in the Pacific north-west could trigger another on California's San Andreas fault, leading to unprecedented destruction. This finding is significant as it highlights the interconnectedness of seismic activity in the region, intensifying fears about the long-predicted 'big one' that could devastate major cities.
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