M 3.3 Earthquake Recorded Near Petrolia, California
Areazine synthesizes this USGS earthquake report directly from USGS's official public data feed. See our methodology for full source attribution and refresh cadence.
A minor magnitude 3.3 earthquake occurred on Friday morning near Petrolia, California, at a shallow depth of approximately 16.6 kilometers.
What this USGS earthquake report tells you, and what most readers miss
This notice was issued by USGS on April 6, 2026 and geographically references Northern California. Its severity classification of "low" signals how the issuing agency weighs the risk of harm if no action is taken - "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to - Earthquakes - determines the monitoring protocol behind it, which shapes what follow-up action (checking for structural damage, watching for aftershocks, reviewing local building codes) is relevant and which agency holds authority over the assessment.
Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to verify its scope, source, and timestamp, then compare related notices without assuming that one record proves a broader trend.
Areazine pairs this record with the original agency URL so you can check the primary source before acting. Its related labels are earthquake, seismic, usgs, Northern California.
What Happened
A minor earthquake with a magnitude of 3.3 (ml) was recorded on Friday, February 13, 2026, at 5:00 PM UTC (9:00 AM local time). The seismic event occurred approximately 9 kilometers west-northwest of Petrolia, California.
Location Details
The earthquake was centered at coordinates 40.348°N and 124.382°W. The event originated at a depth of 16.56 kilometers. Earthquakes occurring at depths less than 20 kilometers are classified as shallow; these events can sometimes result in shaking being more noticeable to those nearby compared to deeper seismic activity.
Impact Assessment
According to the U.S. Geological Survey (USGS), there were no immediate reports of the earthquake being felt by the public at the time of the automated report. There is no tsunami advisory, watch, or warning in effect for this event. No alert level color has been assigned for this magnitude.
What You Should Know
Earthquakes with magnitudes between 2.5 and 3.9 are classified as minor. While these events are often felt by people near the epicenter, they rarely cause structural damage. Residents in seismic zones are encouraged to remain prepared and follow standard safety protocols, such as "Drop, Cover, and Hold On," during shaking.
Source
Information provided by the USGS Earthquake Hazards Program.
Original source: USGS Official Notice ↗
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