Earthquake · reviewed by a seismologist
M 1.9ml
Earthquake near Frazier Park, CA
No earthquake was likely felt in Frazier Park in the 24 hours to 8:14 am PST (16:14 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 1.9 earthquake was recorded 18 km (11 mi) south of Frazier Park, CA, at 4:49 am PDT on 20 April 2019 (11:49 UTC), 8.0 km deep.
USGS: 18km S of Frazier Park, CA
88 km (55 mi) NW of Los Angeles, CA · 48 km (30 mi) NNW of Simi Valley, CA
- When
- 4:49 am PDT on 20 April 2019 ()
- Where
- 18 km (11 mi) south of Frazier Park, CA · earthquakes near Frazier Park
- Magnitude
- M 1.9 (ml)
- Depth
- 8.0 km below the surface
- Felt
- no reports yet
- Nearest
- Ventura County, 37 km SSW
- Nearest mapped fault
- Santa Ynez fault, 10 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 2759 days ago
Earthquake alerts for Frazier Park, CA
Get a notification in this browser when USGS records an earthquake near Frazier Park, 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 12 km (7 mi) from the epicentre. In Frazier Park, 18 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: Lebec, Pine Mountain Club, Fillmore.
How big was it?
This earthquake released about 21 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 710,000× the energy of this one
- Magna, Utah 2020 M 5.7 500,000× the energy of this one
- Around the size people start to feel M 3.0 45× the energy of this one
- This earthquake M 1.9 about 21 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 2,200 times the energy of this one.
Before 2016, the USGS record lists 22 earthquakes of M5 or more within 50 km; the five largest:
- 7.5 The 1952 Kern County, California Earthquake · 33 km N of this epicentre
- 6.0 Tejon Pass, California · 27 km NNE of this epicentre
- 5.8 13km WNW of Grapevine, CA · 36 km NNW of this epicentre
- 5.6 7km NNE of Simi Valley, California · 45 km SE of this epicentre
- 5.5 Southwest of Tejon Pass, California · 5 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 34.6620, -118.9712. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Ventura County, CA | 37 km (23 mi) | SSW | earthquakes near Ventura County |
| Kern County, CA | 79 km (49 mi) | NNE | earthquakes near Kern County |
| Los Angeles County, CA | 83 km (52 mi) | SE | earthquakes near Los Angeles County |
| Santa Barbara County, CA | 99 km (61 mi) | W | earthquakes near Santa Barbara County |
| Orange County, CA | 155 km (96 mi) | SE | earthquakes near Orange County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
50 earthquakes have been recorded within 50 km since this one.
- 1.7 14km SW of Ojai, CA
- 1.5 19km N of Pine Mountain Club, CA
- 2.1 9km WNW of Pine Mountain Club, CA
- 1.7 7km WSW of Ojai, CA
- 1.7 13km SW of Ojai, CA
- 1.5 9km W of Frazier Park, CA
- 1.5 12km NNE of Ojai, CA
- 1.6 3km SW of Lebec, CA
- 2.1 11km N of Pine Mountain Club, CA
- 1.6 11km N of Grapevine, CA
- 2.4 25km NW of Grapevine, CA
- 2.2 9km SW of Castaic, CA
- 2.8 12km N of Grapevine, CA
- 2.3 12km N of Grapevine, CA
- 1.7 12km N of Grapevine, 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.