Earthquake · reviewed by a seismologist
M 1.6ml
Earthquake near Valencia, CA
No earthquake was likely felt in Valencia in the 24 hours to 6:06 am PST (14:06 UTC). The last one was M 2.2, 6 km (4 mi) S, at 8:32 am PDT on 18 October 2026, estimated intensity II (weak) in town; 16 felt reports to USGS. Every earthquake near Valencia
This page: a magnitude 1.6 earthquake was recorded 10 km (6 mi) south-southwest of Valencia, CA, at 6:40 pm PDT on 29 October 2023 (01:40 UTC), 8.6 km deep.
USGS: 13 km SW of Valencia, CA
14 km (9 mi) NE of Simi Valley, CA · 44 km (27 mi) NNW of Los Angeles, CA
- When
- 6:40 pm PDT on 29 October 2023 ()
- Where
- 10 km (6 mi) south-southwest of Valencia, CA · earthquakes near Valencia
- Magnitude
- M 1.6 (ml)
- Depth
- 8.6 km below the surface
- Felt
- no reports yet
- Nearest
- Los Angeles County, 40 km ESE
- Nearest mapped fault
- Sierra Madre fault, 2 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 1109 days ago
Earthquake alerts for Valencia, CA
Get a notification in this browser when USGS records an earthquake near Valencia, 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 8 km (5 mi) from the epicentre. In Valencia, 10 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: Stevenson Ranch, Val Verde, Santa Clarita, Castaic, Piru, Simi Valley.
How big was it?
This earthquake released about 8.7 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,700,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
- Around the size people start to feel M 3.0 110× the energy of this one
- This earthquake M 1.6 about 8.7 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 5.1 on 2023-08-20 — about 140,000 times the energy of this one.
Before 2016, the USGS record lists 19 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 Northridge, California, earthquake · 20 km SSE of this epicentre
- 6.6 1971 San Fernando Earthquake, California · 27 km ENE of this epicentre
- 5.9 1km ENE of Granada Hills, California · 18 km SE of this epicentre
- 5.8 10km SSW of Agua Dulce, CA · 27 km ENE of this epicentre
- 5.8 10km SSW of Agua Dulce, CA · 27 km ENE 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 34.3633, -118.6522. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Los Angeles County, CA | 40 km (25 mi) | ESE | earthquakes near Los Angeles County |
| Ventura County, CA | 44 km (27 mi) | W | earthquakes near Ventura County |
| Kern County, CA | 110 km (68 mi) | N | earthquakes near Kern County |
| Orange County, CA | 111 km (69 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.
- 1.5 11 km WNW of Malibu, CA
- 1.5 10 km WNW of Malibu, CA
- 2.6 10 km WNW of Malibu, CA
- 2.2 11 km NW of Malibu, CA
- 1.8 8 km WNW of Malibu, CA
- 1.8 12 km WNW of Malibu, CA
- 2.0 10 km WNW of Malibu, CA
- 1.6 10 km WNW of Malibu, CA
- 1.5 11 km WNW of Malibu, CA
- 1.5 10 km NW of Malibu, CA
- 1.6 10 km NW of Malibu, CA
- 1.8 9 km WNW of Malibu, CA
- 2.2 10 km WNW of Malibu, CA
- 2.0 13 km WNW of Malibu, CA
- 1.8 11 km WNW of Malibu, 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.