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USGS · REPORTED EARTHQUAKE

M 1.0 · 4 km E of St. Helena, CA

Observed . Review status: reviewed.

MAGNITUDE
1.0 md
DEPTH
6.9 km
LATITUDE
38.5088°
LONGITUDE
-122.4233°

Source & provenance

Source identifier: usgs:nc75440292. Source revised 23 Sep 2026, 18:12 UTC. The latest retained record was collected 23 Sep 2026, 18:16 UTC.

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Versions retained by URSY

History starts when URSY first collects this event. Later source revisions can change reported measurements.

Collected · UTCChangeMagnitudeSource revision · UTC
23 Sep 2026, 18:16 UTCcreated1.023 Sep 2026, 18:12 UTC

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