Earthquake · reviewed by a seismologist
M 1.6ml
Earthquake near Frazier Park, CA
No earthquake was likely felt in Frazier Park in the 24 hours to 1:05 pm PST (21:05 UTC). The last one was M 3.8, 51 km (31 mi) SSE, at 8:00 pm PDT on 29 September 2026, estimated intensity II (weak) in town; 199 felt reports to USGS. Every earthquake near Frazier Park
This page: a magnitude 1.6 earthquake was recorded 8 km (5 mi) west of Frazier Park, CA, at 12:34 am PDT on 20 October 2021 (07:34 UTC), 12 km deep.
USGS: 8km W of Frazier Park, CA
58 km (36 mi) S of Bakersfield, CA · 107 km (66 mi) NNW of Los Angeles, CA
- When
- 12:34 am PDT on 20 October 2021 ()
- Where
- 8 km (5 mi) west of Frazier Park, CA · earthquakes near Frazier Park
- Magnitude
- M 1.6 (ml)
- Depth
- 12 km below the surface
- Felt
- no reports yet
- Nearest
- Ventura County, 53 km S
- Nearest mapped fault
- San Andreas 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 1849 days ago
Earthquake alerts for Frazier Park, 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 it was probably too small to be felt, even directly above it. In Frazier Park, 8 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: Pine Mountain Club, Lebec.
How big was it?
This earthquake released about 6.6 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 2,300,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,600,000× the energy of this one
- Around the size people start to feel M 3.0 140× the energy of this one
- This earthquake M 1.6 about 6.6 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 7,200 times the energy of this one.
Before 2016, the USGS record lists 18 earthquakes of M5 or more within 50 km; the five largest:
- 7.5 The 1952 Kern County, California Earthquake · 15 km NNE of this epicentre
- 6.0 Tejon Pass, California · 15 km ENE of this epicentre
- 5.8 13km WNW of Grapevine, CA · 16 km N of this epicentre
- 5.5 Southwest of Tejon Pass, California · 15 km SSE of this epicentre
- 5.5 13km ENE of Grapevine, CA · 28 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 34.8303, -119.0373. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Ventura County, CA | 53 km (33 mi) | S | earthquakes near Ventura County |
| Kern County, CA | 64 km (40 mi) | NNE | earthquakes near Kern County |
| Santa Barbara County, CA | 97 km (60 mi) | WSW | earthquakes near Santa Barbara County |
| Los Angeles County, CA | 100 km (62 mi) | SE | earthquakes near Los Angeles 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 11km NNW of Piru, CA
- 2.2 10km ESE of Ojai, CA
- 1.5 10km NW of Santa Paula, CA
- 1.9 10km NW of Santa Paula, CA
- 2.6 10km NW of Santa Paula, CA
- 1.7 10km NNW of Santa Paula, CA
- 1.6 10km NW of Santa Paula, CA
- 3.9 10km NW of Santa Paula, CA
- 2.3 10km NW of Santa Paula, CA
- 2.0 10km NW of Santa Paula, CA
- 1.7 14km SW of Lamont, CA
- 2.1 18km NW of Grapevine, CA
- 1.7 18km NW of Grapevine, CA
- 1.6 19km ENE of Maricopa, CA
- 1.6 6km W of Ojai, 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.