Earthquake · reviewed by a seismologist
M 2.1ml
Earthquake near Santa Paula, CA
No earthquake was likely felt in Santa Paula in the 24 hours to 3:37 am PST (11:37 UTC). The last one was M 1.9, 9 km (6 mi) NW, at 2:39 am PDT on 23 October 2026, estimated intensity II (weak) in town. Every earthquake near Santa Paula
This page: a magnitude 2.1 earthquake was recorded 14 km (9 mi) north of Santa Paula, CA, at 2:21 am PST on 1 December 2017 (10:21 UTC), 11 km deep.
USGS: 14km N of Santa Paula, CA
77 km (48 mi) NW of Los Angeles, CA · 29 km (18 mi) N of Camarillo, CA
- When
- 2:21 am PST on 1 December 2017 ()
- Where
- 14 km (9 mi) north of Santa Paula, CA · earthquakes near Santa Paula
- Magnitude
- M 2.1 (ml)
- Depth
- 11 km below the surface
- Felt
- no reports yet
- Nearest
- Ventura County, 16 km SSW
- Nearest mapped fault
- San Cayetano fault, 6 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 3268 days ago
Earthquake alerts for Santa Paula, CA
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 12 km (7 mi) from the epicentre. In Santa Paula, 14 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Earthquakes near other towns within 30 km: Fillmore, Ojai, Meiners Oaks, Mira Monte, Saticoy, Piru.
How big was it?
This earthquake released about 37 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 410,000× the energy of this one
- Magna, Utah 2020 M 5.7 290,000× the energy of this one
- Around the size people start to feel M 3.0 26× the energy of this one
- This earthquake M 2.1 about 37 lb of TNT
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
For this area
The largest earthquake within 50 km since 2016 was M 4.1 on 2016-03-12 — about 1,300 times the energy of this one.
Before 2016, the USGS record lists 14 earthquakes of M5 or more within 50 km; the five largest:
- 6.0 Tejon Pass, California · 49 km NNE of this epicentre
- 5.6 7km NNE of Simi Valley, California · 36 km ESE of this epicentre
- 5.5 Southwest of Tejon Pass, California · 25 km N of this epicentre
- 5.5 10 km NE of Toro Canyon, California · 42 km W of this epicentre
- 5.2 9 km SW of Channel Islands Beach, California · 48 km SSW of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 34.4780, -119.0428. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Ventura County, CA | 16 km (10 mi) | SSW | earthquakes near Ventura County |
| Los Angeles County, CA | 78 km (49 mi) | ESE | earthquakes near Los Angeles County |
| Santa Barbara County, CA | 91 km (57 mi) | W | earthquakes near Santa Barbara County |
| Kern County, CA | 101 km (63 mi) | NNE | earthquakes near Kern County |
| Orange County, CA | 147 km (91 mi) | SE | earthquakes near Orange County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
47 earthquakes have been recorded within 50 km since this one.
- 1.6 10km NNE of Ventura, CA
- 1.7 11km SW of Westlake Village, CA
- 1.9 3km NE of Chatsworth, CA
- 2.1 12km WNW of Malibu, CA
- 1.8 7km WNW of Castaic, CA
- 2.3 11km WSW of Grapevine, CA
- 1.9 1km SW of Chatsworth, CA
- 1.6 8km ESE of Carpinteria, CA
- 2.1 20km WSW of Ventura, CA
- 2.3 8km SW of Valencia, CA
- 1.7 8km SW of Valencia, CA
- 1.5 2km ENE of Simi Valley, CA
- 2.0 4km NW of Frazier Park, CA
- 2.4 15km WNW of Malibu, CA
- 1.7 11km N of Piru, CA
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.