Earthquake · reviewed by a seismologist
M 3.1ml
Earthquake near Rosedale, CA
No earthquake was likely felt in Rosedale in the 24 hours to 6:18 am PST (14:18 UTC). The last one was M 4.3, 121 km (75 mi) E, at 9:40 am PDT on 13 July 2026, estimated intensity II (weak) in town; 1,090 felt reports to USGS. Every earthquake near Rosedale
This page: a magnitude 3.1 earthquake was recorded 10 km (6 mi) south-southwest of Rosedale, CA, at 7:19 am PDT on 27 May 2021 (14:19 UTC), 25 km deep. 90 people have reported feeling it to USGS.
USGS: 10km SSW of Rosedale, CA
16 km (10 mi) WSW of Bakersfield, CA
- When
- 7:19 am PDT on 27 May 2021 ()
- Where
- 10 km (6 mi) south-southwest of Rosedale, CA · earthquakes near Rosedale
- Magnitude
- M 3.1 (ml)
- Depth
- 25 km below the surface
- Felt
- 90 reports · strongest reported intensity IV
- Nearest
- Kern County, 43 km E
- Nearest mapped fault
- New Hope fault, 24 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 1930 days ago
Earthquake alerts for Rosedale, 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 small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth, people at rest would likely notice it out to about 34 km (21 mi) from the epicentre. In Rosedale, 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.
Likely felt in: Rosedale 10 km, intensity II · Bakersfield 18 km, intensity II · Oildale 21 km, intensity II · Shafter 22 km, intensity II · Buttonwillow 26 km, intensity II · Lamont 27 km, intensity II · Taft 29 km, intensity II · Maricopa 33 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 1,400 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 240,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 11,000× the energy of this one
- Magna, Utah 2020 M 5.7 7,700× the energy of this one
- This earthquake M 3.1 about 1,400 lb of TNT
- Around the size people start to feel M 3.0 this one released 1.5× more
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 4.9 on 2016-02-24 — about 440 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 · 43 km SSE of this epicentre
- 5.8 Near Bakersfield, California · 37 km E of this epicentre
- 5.8 13km WNW of Grapevine, CA · 40 km SSE of this epicentre
- 5.7 11km N of Lamont, CA · 29 km E of this epicentre
- 5.5 6km SSE of Arvin, CA · 40 km ESE 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 35.3097, -119.2053. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Kern County, CA | 43 km (27 mi) | E | earthquakes near Kern County |
| Kings County, CA | 101 km (63 mi) | NNW | earthquakes near Kings County |
| Ventura County, CA | 106 km (66 mi) | S | earthquakes near Ventura County |
| Tulare County, CA | 109 km (68 mi) | NNE | earthquakes near Tulare County |
| San Luis Obispo County, CA | 113 km (70 mi) | W | earthquakes near San Luis Obispo County |
| Santa Barbara County, CA | 115 km (71 mi) | SW | earthquakes near Santa Barbara County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
54 earthquakes have been recorded within 50 km since this one.
- 1.5 8km NNE of Grapevine, CA
- 1.6 20km NW of Grapevine, CA
- 1.7 14km SW of Lamont, CA
- 2.1 18km NW of Grapevine, CA
- 1.7 18km NW of Grapevine, CA
- 2.5 15km SSE of Buttonwillow, CA
- 1.6 19km ENE of Maricopa, CA
- 2.4 13km NNW of Grapevine, CA
- 2.6 12km NNW of Grapevine, CA
- 2.8 12km NNW of Grapevine, CA
- 3.5 13km NNW of Grapevine, CA
- 1.8 19km E of Maricopa, CA
- 2.0 19km E of Maricopa, CA
- 1.8 13km N of Pine Mountain Club, CA
- 1.8 8km ESE of Shafter, 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.