Earthquake · reviewed by a seismologist
M 3.7ml
Earthquake near Ojai, CA
No earthquake was likely felt in Ojai in the 24 hours to 5:19 am PST (13:19 UTC). The last one was M 1.5, 7 km (5 mi) S, at 2:56 am PST on 6 November 2026, estimated intensity II (weak) in town. Every earthquake near Ojai
This page: a magnitude 3.7 earthquake was recorded 16 km (10 mi) northeast of Ojai, CA, at 12:50 pm PDT on 15 October 2023 (19:50 UTC), 7.0 km deep. 117 people have reported feeling it to USGS.
USGS: 16 km NE of Ojai, CA
90 km (56 mi) NW of Los Angeles, CA · 35 km (22 mi) NNE of San Buenaventura (Ventura), CA
- When
- 12:50 pm PDT on 15 October 2023 ()
- Where
- 16 km (10 mi) northeast of Ojai, CA · earthquakes near Ojai
- Magnitude
- M 3.7 (ml)
- Depth
- 7.0 km below the surface
- Felt
- 117 reports · strongest reported intensity IV
- Measured shaking
- intensity IV (ShakeMap)
- Nearest
- Ventura County, 23 km S
- Nearest mapped fault
- Santa Ynez fault, 3 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 1052 days ago
Earthquake alerts for Ojai, CA
Get a notification in this browser when USGS records an earthquake near Ojai, CA. No account or email needed.
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 small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth, people at rest would likely notice it out to about 76 km (47 mi) from the epicentre. In Ojai, 16 km away, the estimate is intensity III (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.
Likely felt in: Ojai 16 km, intensity III · Santa Paula 24 km, intensity III · Frazier Park 34 km, intensity III · Ventura 35 km, intensity II · Piru 35 km, intensity II · Moorpark 39 km, intensity II · Carpinteria 40 km, intensity II · Camarillo 40 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 5.5 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.7 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 31,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 1,400× the energy of this one
- Magna, Utah 2020 M 5.7 970× the energy of this one
- This earthquake M 3.7 about 5.5 tons of TNT
- Around the size people start to feel M 3.0 this one released 12× more
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 5.1 on 2023-08-20 — about 110 times the energy of this one.
Before 2016, the USGS record lists 15 earthquakes of M5 or more within 50 km; the five largest:
- 7.5 The 1952 Kern County, California Earthquake · 46 km NNE of this epicentre
- 6.0 Tejon Pass, California · 43 km NNE of this epicentre
- 5.8 13km WNW of Grapevine, CA · 46 km N of this epicentre
- 5.6 7km NNE of Simi Valley, California · 48 km ESE of this epicentre
- 5.5 Southwest of Tejon Pass, California · 20 km NE 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 34.5637, -119.1363. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Ventura County, CA | 23 km (14 mi) | S | earthquakes near Ventura County |
| Santa Barbara County, CA | 83 km (51 mi) | W | earthquakes near Santa Barbara County |
| Los Angeles County, CA | 90 km (56 mi) | ESE | earthquakes near Los Angeles County |
| Kern County, CA | 95 km (59 mi) | NNE | earthquakes near Kern County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
52 earthquakes have been recorded within 50 km since this one.
- 1.6 7 km SE of Ojai, CA
- 1.7 19 km NE of Ojai, CA
- 2.0 11 km ENE of Pine Mountain Club, CA
- 2.0 7 km E of Port Hueneme, CA
- 2.0 4 km N of Frazier Park, CA
- 1.5 5 km W of Ojai, CA
- 1.9 12 km ESE of Carpinteria, CA
- 1.6 14 km N of Fillmore, CA
- 1.9 15 km N of Fillmore, CA
- 1.6 8 km E of Lebec, CA
- 2.0 2 km S of Pine Mountain Club, CA
- 1.7 2 km NNW of Frazier Park, CA
- 1.6 8 km NE of Montecito, CA
- 1.7 13 km N of Fillmore, CA
- 1.5 20 km N of Fillmore, 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.