M 3.5 Earthquake Recorded 23 km SSW of Rancho Palos Verdes, California

Source: USGS · Southern California

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A minor magnitude 3.5 earthquake occurred Monday night off the coast of Southern California. The shallow quake was felt by dozens of residents but no damage was reported.

What this USGS earthquake report tells you, and what most readers miss

This notice was issued by USGS on February 23, 2026 and geographically references Southern 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 regulatory framework behind it, which shapes what remedies (refunds, replacements, recalls, evacuations) are available to affected individuals and who holds statutory responsibility for enforcement.

Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to read it as a data point about the issuing system: how quickly USGS detected the hazard, how precise the geographic or product-identifier scope is, and whether similar notices have clustered in the same category or region in the last 90 days. Cluster patterns frequently precede a broader regulatory action — a single localized USGS earthquake report is isolated; three of them within a quarter often indicate a supply-chain, infrastructure, or seasonal driver that will keep producing notices until something structural changes.

For decision-making, Areazine pairs each alert with the original agency URL, the full agency name, and a timestamp so you can verify the notice against the primary source before acting on it. Tags on this item (earthquake, seismic, usgs, California) map to related alerts in the same area of risk — browsing them together gives a clearer picture than any single notice alone, because the shape of an ongoing issue only becomes visible across multiple sequential alerts.

What Happened

A minor earthquake with a magnitude of 3.5 mlr was recorded on February 24, 2026, at 05:40 UTC (February 23, 9:40 PM local time). The event occurred at a shallow depth of 10.87 km.

Location Details

The epicenter was located at coordinates 33.553°N, 118.468°W, approximately 23 km south-southwest of Rancho Palos Verdes, California. The depth of 10.87 km is considered shallow; earthquakes at this depth are more likely to be felt on the surface than deeper events.

Impact Assessment

According to the USGS "Did You Feel It?" service, 70 individuals reported feeling the tremor. There is no tsunami advisory, watch, or warning in effect for this event. No alert level color was assigned, and the event is considered routine seismic activity.

What You Should Know

Earthquakes of this magnitude (M 2.5-3.9) are classified as minor. They are often felt by people near the epicenter but rarely cause damage to structures. Residents may experience minor aftershocks, which is routine for seismic activity in this region. During shaking, remember to Drop, Cover, and Hold On.

Source

Information provided by the USGS Earthquake Hazards Program.

Original source: USGS Official Notice ↗

All Earthquakes →

Frequently Asked Questions

Common questions about this USGS earthquake report.

What is this USGS earthquake report about?
A minor magnitude 3.5 earthquake occurred Monday night off the coast of Southern California. The shallow quake was felt by dozens of residents but no damage was reported.
Which agency issued this alert?
This alert was issued by USGS. The original notice is available at the source link at the bottom of this article.
How severe is this alert?
This alert is classified as "low" severity. No immediate action required, but stay aware.
What area is affected?
This alert affects Southern California. Check with USGS for the most current geographic scope.
Where can I find more Earthquakes updates?
Browse the full Earthquakes feed on Areazine at areazine.com/earthquakes/ for the latest updates from USGS and other agencies.