USGS ShakeAlert System Reportedly Generated False Earthquake Alert Affecting Nevada and California
Description
On December 4, 2025, the USGS's automated ShakeAlert earthquake detection system erroneously issued a report claiming a magnitude 5.9 earthquake had struck near Dayton, Nevada. The reported false alert triggered emergency warnings on cell phones in parts of California, instructing residents to take protective action. USGS officials said no earthquake occurred and are investigating whether sensor noise or other anomalies caused the system failure.
Actors
Alleged Deployers
- united-states-geological-survey-(usgs)
Alleged Developers
- united-states-geological-survey-(usgs)
- berkeley-seismological-laboratory
Harmed Parties
- general-public
- general-public-of-nevada
- general-public-of-california
- epistemic-integrity
Classification
Risk Domain
AI Safety & FailuresRisk Subdomain
7.3. Lack of capability or robustness
MIT Risk Profile
Topics
Source
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Mitigation Tools
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