Earthquake · reviewed by a seismologist
M 1.8ml
Earthquake near Fillmore, CA
No earthquake was likely felt in Fillmore in the 24 hours to 5:54 am PST (13:54 UTC). The last one was M 3.8, 14 km (9 mi) E, at 8:00 pm PDT on 29 September 2026, estimated intensity III (weak) in town; 199 felt reports to USGS. Every earthquake near Fillmore
This page: a magnitude 1.8 earthquake was recorded 6 km (4 mi) north-northwest of Fillmore, CA, at 9:15 pm PDT on 29 April 2016 (04:15 UTC), less than 1 km deep.
USGS: 6km NNW of Fillmore, CA
68 km (42 mi) NW of Los Angeles, CA · 27 km (16 mi) NW of Simi Valley, CA
- When
- 9:15 pm PDT on 29 April 2016 ()
- Where
- 6 km (4 mi) north-northwest of Fillmore, CA · earthquakes near Fillmore
- Magnitude
- M 1.8 (ml)
- Depth
- 0.8 km below the surface
- Felt
- no reports yet
- Nearest
- Ventura County, 21 km WSW
- Nearest mapped fault
- San Cayetano fault, 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 3830 days ago
Earthquake alerts for Fillmore, CA
Get a notification in this browser when USGS records an earthquake near Fillmore, 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 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 14 km (9 mi) from the epicentre. In Fillmore, 6 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: Piru 13 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 16 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 930,000× the energy of this one
- Magna, Utah 2020 M 5.7 660,000× the energy of this one
- Around the size people start to feel M 3.0 59× the energy of this one
- This earthquake M 1.8 about 16 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 2,900 times the energy of this one.
Before 2016, the USGS record lists 14 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 Northridge, California, earthquake · 45 km SE of this epicentre
- 6.0 Tejon Pass, California · 50 km N of this epicentre
- 5.9 1km ENE of Granada Hills, California · 45 km ESE of this epicentre
- 5.6 7km NNE of Simi Valley, California · 26 km ESE of this epicentre
- 5.5 Southwest of Tejon Pass, California · 28 km NNW 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 34.4520, -118.9310. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Ventura County, CA | 21 km (13 mi) | WSW | earthquakes near Ventura County |
| Los Angeles County, CA | 68 km (42 mi) | ESE | earthquakes near Los Angeles County |
| Kern County, CA | 101 km (63 mi) | N | earthquakes near Kern County |
| Santa Barbara County, CA | 102 km (63 mi) | W | earthquakes near Santa Barbara County |
| Orange County, CA | 137 km (85 mi) | SE | earthquakes near Orange County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
53 earthquakes have been recorded within 50 km since this one.
- 2.0 17km ESE of Port Hueneme, CA
- 2.2 11km N of Piru, CA
- 2.0 3km WSW of Panorama City, CA
- 2.2 11km WNW of Ventura, CA
- 1.6 15km W of Ventura, CA
- 1.8 10km NW of Malibu, CA
- 1.9 12km WNW of Ventura, CA
- 2.3 11km WNW of Ventura, CA
- 1.9 13km NW of Ventura, CA
- 2.4 14km N of Santa Paula, CA
- 1.7 4km S of Frazier Park, CA
- 1.7 13km NNE of Ojai, CA
- 2.2 13km NNE of Ojai, CA
- 1.8 14km N of Santa Paula, CA
- 1.9 2km E of Tarzana, 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.