Hermosa Beach earthquake, Sept. 27, 2026: magnitude 3.6
USGS lists the Sunday, Sept. 27 earthquake 7 km WSW of Hermosa Beach at magnitude 3.6. It struck at 8:40 a.m. PDT. The reviewed record may change.
USGS MAGNITUDE3.6Some early reports: 3.5
- Time
- 8:40 a.m. PDT · Sept. 27
- Location
- 7 km WSW of Hermosa Beach
- Depth
- 11.9 km · 7.4 mi
- Felt reports
- 2,119 when checked · Sept. 29
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Why did some reports say 3.5?
Magnitude estimates can change as more seismic readings are reviewed. The USGS catalog now gives this event as 3.6; the difference from an early 3.5 report does not mean the earthquake grew stronger after it happened.
What does the felt-report count mean?
It counts people who told the USGS they felt shaking. It is not a count of injuries or damage, and the total can change as more reports arrive.
The USGS event catalog is the live record. Measurements and felt reports may be updated.
Sources: USGS · event record · USGS · magnitude updates · CBS Los Angeles · early report.