As of : USGS listed 479 earthquakes of magnitude 1.5 or higher labeled California in the past 30 days: 114 in the last 7 days, 13 in the last 24 hours. The largest was M4.8, 97 km W of Petrolia, CA, on Sep 29. That is more than the 100 of the week before.
Published: · Data updated:
Not an alert service. Automatic, preliminary data from USGS that can be revised. For emergencies follow local officials; for the official live map use the USGS Latest Earthquakes page.
| Magnitude | Time | Depth (km) | Location |
|---|---|---|---|
| M1.7 | Oct 27, 21:19 UTC | 17 | 12 km NNE of Cabazon, CA |
| M1.6 | Oct 27, 19:53 UTC | 2 | 5 km WNW of Cobb, CA |
| M2.6 | Oct 27, 19:38 UTC | 7 | 14 km E of Seven Trees, CA |
| M1.6 | Oct 27, 18:38 UTC | 8 | 11 km N of Redwood Valley, CA |
| M1.8 | Oct 27, 16:16 UTC | 8 | 11 km E of Yorba Linda, CA |
| M2.1 | Oct 27, 15:52 UTC | 1 | 12 km SE of Livermore, CA |
| M1.9 | Oct 27, 11:43 UTC | 5 | 8 km ENE of Gilroy, CA |
| M1.7 | Oct 27, 08:26 UTC | 1 | 19 km SW of Toms Place, CA |
| M2.1 | Oct 27, 06:49 UTC | 6 | 22 km NNE of San Lucas, CA |
| M2.2 | Oct 27, 05:38 UTC | 10 | 20 km ESE of Julian, CA |
| M1.7 | Oct 27, 05:12 UTC | 19 | 15 km W of Petrolia, CA |
| M1.8 | Oct 27, 02:22 UTC | 4 | 25 km NNE of Montecito, CA |
| M2.2 | Oct 27, 02:15 UTC | 12 | 9 km WNW of Anza, CA |
| M1.7 | Oct 26, 22:35 UTC | 19 | 9 km SSW of Idyllwild, CA |
| M2.0 | Oct 26, 19:05 UTC | 4 | 7 km ENE of Vallejo, CA |
| M1.9 | Oct 26, 18:54 UTC | 3 | 25 km NNE of Montecito, CA |
| M2.2 | Oct 26, 18:43 UTC | 8 | 25 km NNE of Montecito, CA |
| M1.7 | Oct 26, 16:37 UTC | 8 | 5 km ENE of Pinnacles, CA |
| M1.6 | Oct 26, 15:41 UTC | 5 | 5 km SW of Anza, CA |
| M2.1 | Oct 26, 13:17 UTC | 16 | 6 km E of Cantua Creek, CA |
| M1.6 | Oct 26, 13:17 UTC | 7 | 2 km W of Fontana, CA |
| M2.5 | Oct 26, 13:10 UTC | 5 | 4 km SE of Aromas, CA |
| M1.6 | Oct 26, 07:06 UTC | -1 | 7 km SE of Redwood Valley, CA |
| M2.0 | Oct 26, 02:38 UTC | 23 | 19 km SSE of Blue Lake, CA |
| M1.6 | Oct 26, 01:40 UTC | 4 | 2 km NW of Sylmar, CA |
Last checked against the source: . USGS-authored data are in the U.S. public domain; credit: U.S. Geological Survey. This site is not affiliated with or endorsed by USGS.
| Magnitude | Events | Share |
|---|---|---|
| M1.5 to 1.9 | 308 | 64% |
| M2.0 to 2.9 | 154 | 32% |
| M3.0 to 3.9 | 16 | 3% |
| M4.0 to 4.9 | 1 | 0% |
| M5.0 and above | 0 | 0% |
| Day | Events | Largest |
|---|---|---|
| Oct 14 | 13 | 3.0 |
| Oct 15 | 20 | 2.9 |
| Oct 16 | 18 | 2.8 |
| Oct 17 | 9 | 2.9 |
| Oct 18 | 14 | 2.5 |
| Oct 19 | 10 | 2.4 |
| Oct 20 | 15 | 3.1 |
| Oct 21 | 12 | 3.1 |
| Oct 22 | 22 | 3.2 |
| Oct 23 | 11 | 3.4 |
| Oct 24 | 22 | 2.9 |
| Oct 25 | 21 | 2.7 |
| Oct 26 | 13 | 2.5 |
| Oct 27 | 13 | 2.6 |
| Magnitude | Time | Depth (km) | Location |
|---|---|---|---|
| M4.8 | Sep 29, 11:36 UTC | 10 | 97 km W of Petrolia, CA |
| M3.8 | Sep 30, 03:00 UTC | 10 | 4 km SE of Piru, CA |
| M3.5 | Oct 5, 20:22 UTC | 11 | 31 km SW of Dana Point, CA |
| M3.4 | Oct 23, 05:38 UTC | 10 | 70 km W of Ferndale, CA |
| M3.3 | Oct 2, 10:00 UTC | 11 | 9 km WSW of South Lake Tahoe, CA |
| Nearest named place | Events |
|---|---|
| The Geysers | 43 |
| Petrolia | 31 |
| Anza | 21 |
| Cobb | 20 |
| Toms Place | 16 |
Depth: median 6.3 km, deepest 38.7 km. Median magnitude 1.81. Average per week over 30 days: 111.8. Tsunami flag set on 0 events (the USGS flag marks events in oceanic regions; it is not a tsunami warning, see tsunami.gov).
How the figures are counted: Events counted: USGS catalog type “earthquake”, magnitude 1.5 or higher, origin time in the 30 days before the data were pulled, location label ending in the state name or its postal abbreviation. Weeks are 7 × 24 hours counted back from the pull time.
Worked example: 479 events in 30 days × 7 ÷ 30 = 111.8 per week on average; the last 7 days had 114.
USGS lists 479 earthquakes of magnitude 1.5 or higher labeled California in the 30 days before Oct 27, 2026, 23:38 UTC: 114 in the last 7 days and 13 in the last 24 hours. 53 of them reached M2.5 or higher and 17 reached M3.0 or higher.
The largest was M4.8, 97 km W of Petrolia, CA, at Sep 29, 11:36 UTC, at a depth of 10 km.
Sites differ in the magnitude cut-off, the time window and how an event is assigned to a state. This page counts every event of M1.5 or higher in the USGS catalog whose location label ends in “California”, for the 30 days before the data were pulled. Small events are detected less completely in some areas, and magnitudes are often revised.
USGS collects felt reports through its “Did You Feel It?” system at earthquake.usgs.gov/data/dyfi. In this list 75 events have at least one felt report, 2775 reports in total.
This page is a statistics page, not a warning service. The official guidance from ready.gov is to Drop, Cover, and Hold On, and to follow instructions from local emergency officials.