Earthquake · reviewed by a seismologist
M 3.4ml
Earthquake near Running Springs, CA
No earthquake was likely felt in Running Springs in the 24 hours to 7:28 pm PST (03:28 UTC). The last one was M 2.0, 13 km (8 mi) WSW, at 3:40 pm PDT on 22 September 2026, estimated intensity II (weak) in town; 14 felt reports to USGS. Every earthquake near Running Springs
This page: a magnitude 3.4 earthquake was recorded 10 km (6 mi) southeast of Running Springs, CA, at 2:10 am PST on 10 February 2017 (10:10 UTC), 9.7 km deep. 525 people have reported feeling it to USGS.
USGS: 10km SE of Running Springs, CA
11 km (7 mi) N of Yucaipa, CA · 126 km (78 mi) E of Los Angeles, CA
- When
- 2:10 am PST on 10 February 2017 ()
- Where
- 10 km (6 mi) southeast of Running Springs, CA · earthquakes near Running Springs
- Magnitude
- M 3.4 (ml)
- Depth
- 9.7 km below the surface
- Felt
- 525 reports · strongest reported intensity IV
- Measured shaking
- intensity V (ShakeMap)
- Nearest
- Orange County, 84 km SW
- Nearest mapped fault
- San Andreas 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 3474 days ago
Earthquake alerts for Running Springs, CA
Get a notification in this browser when USGS records an earthquake near Running Springs, 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 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 59 km (37 mi) from the epicentre. In Running Springs, 10 km away, the estimate is intensity III (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: Mentone 11 km, intensity III · Yucaipa 11 km, intensity III · Highland 15 km, intensity III · Redlands 15 km, intensity III · Big Bear Lake 18 km, intensity III · Lake Arrowhead 19 km, intensity III · Loma Linda 22 km, intensity III · San Bernardino 23 km, intensity III. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 2.2 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.4 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 78,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 3,500× the energy of this one
- Magna, Utah 2020 M 5.7 2,500× the energy of this one
- This earthquake M 3.4 about 2.2 tons of TNT
- Around the size people start to feel M 3.0 this one released 4.6× 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 4.4 on 2016-01-06 — about 27 times the energy of this one.
Before 2016, the USGS record lists 20 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 The 1918 San Jacinto, California Earthquake · 42 km S of this epicentre
- 6.3 The 1992 Big Bear, California Earthquake · 22 km ENE of this epicentre
- 6.2 3 km SE of San Bernardino, California · 20 km WSW of this epicentre
- 6.0 The 1986 North Palm Springs, California Earthquake · 43 km ESE of this epicentre
- 5.6 7km ENE of Running Springs, CA · 12 km N 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 34.1305, -117.0460. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 84 km (52 mi) | SW | earthquakes near Orange County |
| Riverside County, CA | 106 km (66 mi) | ESE | earthquakes near Riverside County |
| Los Angeles County, CA | 112 km (70 mi) | W | earthquakes near Los Angeles County |
| San Bernardino County, CA | 113 km (70 mi) | NE | earthquakes near San Bernardino County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
49 earthquakes have been recorded within 50 km since this one.
- 2.1 6km N of Lytle Creek, CA
- 1.5 2km NNE of Colton, CA
- 1.6 3km NNE of Colton, CA
- 1.8 2km NNW of San Bernardino, CA
- 2.2 1km NNW of Lake Arrowhead, CA
- 1.8 6km E of Calimesa, CA
- 1.5 10km NNW of Banning, CA
- 1.6 5km NW of Idyllwild, CA
- 3.0 5km SE of Lytle Creek, CA
- 2.5 6km S of Redlands, CA
- 1.6 11km SSW of Big Bear Lake, CA
- 1.6 4km WNW of Cabazon, CA
- 2.7 2km ESE of Loma Linda, CA
- 2.7 4km WNW of Cabazon, CA
- 2.4 2km SE of Loma Linda, 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.