Earthquake · reviewed by a seismologist
M 2.4ml
Earthquake near Ojai, CA
No earthquake was likely felt in Ojai in the 24 hours to 11:28 am PST (19:28 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 2.4 earthquake was recorded 12 km (8 mi) west-southwest of Ojai, CA, at 10:30 pm PDT on 26 September 2017 (05:30 UTC), 2.7 km deep. 2 people have reported feeling it to USGS.
USGS: 12km WSW of Ojai, CA
99 km (62 mi) WNW of Los Angeles, CA · 20 km (13 mi) NNW of San Buenaventura (Ventura), CA
- When
- 10:30 pm PDT on 26 September 2017 ()
- Where
- 12 km (8 mi) west-southwest of Ojai, CA · earthquakes near Ojai
- Magnitude
- M 2.4 (ml)
- Depth
- 2.7 km below the surface
- Felt
- 2 reports · strongest reported intensity III
- Nearest
- Ventura County, 23 km ESE
- Nearest mapped fault
- Mission Ridge fault system, under 1 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 3304 days ago
Earthquake alerts for Ojai, 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 20 km (12 mi) from the epicentre. In Ojai, 12 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.
Likely felt in: Ojai 12 km, intensity II · Carpinteria 14 km, intensity II · Ventura 17 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 100 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 140,000× the energy of this one
- Magna, Utah 2020 M 5.7 100,000× the energy of this one
- Around the size people start to feel M 3.0 9.1× the energy of this one
- This earthquake M 2.4 about 100 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 450 times the energy of this one.
Before 2016, the USGS record lists 9 earthquakes of M5 or more within 50 km; the five largest:
- 6.8 The 1925 Santa Barbara, California Earthquake · 41 km WSW of this epicentre
- 5.5 Southwest of Tejon Pass, California · 46 km NE of this epicentre
- 5.5 30 km SW of Channel Islands Beach, California · 48 km SSW of this epicentre
- 5.5 10 km NE of Toro Canyon, California · 15 km NW of this epicentre
- 5.5 The 1941 Santa Barbara, California Earthquake · 20 km WSW 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 34.4205, -119.3735. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Ventura County, CA | 23 km (14 mi) | ESE | earthquakes near Ventura County |
| Santa Barbara County, CA | 62 km (39 mi) | WNW | earthquakes near Santa Barbara County |
| Los Angeles County, CA | 105 km (65 mi) | ESE | earthquakes near Los Angeles County |
| Kern County, CA | 119 km (74 mi) | NNE | earthquakes near Kern County |
| San Luis Obispo County, CA | 146 km (90 mi) | NW | earthquakes near San Luis Obispo County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
44 earthquakes have been recorded within 50 km since this one.
- 1.6 14km SSE of Santa Barbara, CA
- 1.8 12km NNW of Santa Barbara, CA
- 1.9 14km SSE of Santa Barbara, CA
- 1.8 15km SSE of Santa Barbara, CA
- 1.7 14km SSE of Santa Barbara, CA
- 2.0 7km S of Montecito, CA
- 1.6 8km ESE of Carpinteria, CA
- 2.1 20km WSW of Ventura, CA
- 1.8 14km SSE of Santa Barbara, CA
- 1.8 15km SSE of Santa Barbara, CA
- 2.3 21km NNW of Santa Cruz Is. (E end), CA
- 2.0 14km SW of Port Hueneme, CA
- 1.7 6km ESE of Port Hueneme, CA
- 1.7 7km NNW of Fillmore, CA
- 2.4 17km SW of Port Hueneme, 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.