M 3.9 Minor Earthquake Recorded Near The Geysers, 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 3.9 magnitude earthquake occurred 6 km north-northwest of The Geysers, California, on February 18, 2026. The event was recorded at a very shallow depth.
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, California.
What Happened
A minor earthquake with a magnitude of 3.9 ml occurred on Wednesday, February 18, 2026, at 9:22 AM local time (17:22:55 UTC). The event was centered 6 km north-northwest of The Geysers, California, and has been officially reviewed by seismologists.
Location Details
The earthquake's coordinates were recorded at 38.8227°N and 122.7913°W. The seismic event occurred at a depth of -0.91 km. In geological terms, depths less than 20 km are classified as shallow; this specific event was extremely close to the surface.
Impact Assessment
According to the USGS, there was no tsunami advisory, watch, or warning issued in connection with this event. The data currently shows no recorded felt reports from the public. No alert level color was assigned to this specific event, indicating routine seismic activity for the region.
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 seismically active areas should be aware of the possibility of minor aftershocks, which are common following events of this size.
Source
Data and attribution provided by the USGS Earthquake Hazards Program.
Original source: USGS Official Notice ↗
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Common questions about this USGS earthquake report.