Earthquake Alert
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Your report helps USGS map how strongly this earthquake was felt in your area.

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Quick report
Earthquake reported
USGS LIVE FEED
2.7
Recorded event

Fontana, CA

Tectonic earthquake
Near mapped fault: unnamed fault near Fontana · ~1 mi
Nearby volcano: Lavic Lake Volcanic Field · ~66 mi · proximity only
1h ago 6 km deep
Event intelligence

What we know right now

Earthquake Alert separates measured facts, model estimates and public reports so magnitude is not confused with shaking or impact.

ObservedEstimatedReportedForecast
Magnitude + depth
Observed
M2.7 · 6 km
Recorded seismic event. Location: Fontana, CA.
Instrumental shaking
Estimated
Not felt
USGS MMI 0.0. This describes shaking intensity, not earthquake magnitude.
Public experience
Reported
Light
Community intensity CDI 3.1 from felt reports.
Impact context
Estimated
No impact alert
Magnitude alone does not determine damage or impact.
Scientific products attached
DYFI
Official hazard status
No correlated tsunami alert
No active correlated tsunami warning/advisory/watch is attached to this event in Earthquake Alert.
What experts would say
Plain-language interpretation of current USGS data — not a direct expert quote or earthquake prediction.
At this magnitude, effects are usually local and may not be felt except near the source.
144 public felt reports indicate the event has been noticed by a substantial number of people.
Felt reports
144
USGS Did You Feel It? reports
Reported intensity
Light
CDI 3.1 · community reports
Instrumental intensity
Not felt
MMI 0.0 · estimated shaking
USGS status
automatic
Preliminary automated data

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Earthquake Alert organizes authoritative seismic and hazard information for rapid understanding. Always follow official emergency guidance for safety decisions.

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