Earthquake · reviewed by a seismologist
M 1.8ml
Earthquake near Loma Linda, CA
No earthquake was likely felt in Loma Linda in the 24 hours to 11:31 pm PST (07:31 UTC). The last one was M 2.1, 2 km (1 mi) SE, at 10:40 am PDT on 31 October 2026, estimated intensity II (weak) in town. Every earthquake near Loma Linda
This page: a magnitude 1.8 earthquake was recorded in Loma Linda, CA, at 6:49 am PST on 13 January 2017 (14:49 UTC), 15 km deep.
USGS: 2km SW of Loma Linda, CA
5 km (3 mi) ESE of Colton, CA · 105 km (65 mi) E of Los Angeles, CA
- When
- 6:49 am PST on 13 January 2017 ()
- Where
- in Loma Linda, CA · earthquakes near Loma Linda
- Magnitude
- M 1.8 (ml)
- Depth
- 15 km below the surface
- Felt
- no reports yet
- Nearest
- Orange County, 62 km SW
- Nearest mapped fault
- San Jacinto 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 3563 days ago
Earthquake alerts for Loma Linda, CA
Get a notification in this browser when USGS records an earthquake near Loma Linda, 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 it was probably too small to be felt, even directly above it. 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: Grand Terrace, Colton, Highgrove, San Bernardino, Redlands, Highland.
How big was it?
This earthquake released about 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 730,000× the energy of this one
- Around the size people start to feel M 3.0 65× the energy of this one
- This earthquake M 1.8 about 15 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 4.4 on 2016-01-06 — about 7,900 times the energy of this one.
Before 2016, the USGS record lists 21 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 The 1918 San Jacinto, California Earthquake · 41 km SE of this epicentre
- 6.3 The 1992 Big Bear, California Earthquake · 45 km ENE of this epicentre
- 6.2 3 km SE of San Bernardino, California · 6 km NNE of this epicentre
- 6.0 The 1910 Lake Elsinore, California Earthquake · 39 km SSW of this epicentre
- 5.6 7km ENE of Running Springs, CA · 31 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 34.0387, -117.2732. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 62 km (38 mi) | SW | earthquakes near Orange County |
| Los Angeles County, CA | 93 km (58 mi) | W | earthquakes near Los Angeles County |
| San Diego County, CA | 122 km (76 mi) | SSE | earthquakes near San Diego County |
| Riverside County, CA | 122 km (76 mi) | ESE | earthquakes near Riverside County |
| San Bernardino County, CA | 135 km (84 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
55 earthquakes have been recorded within 50 km since this one.
- 1.8 8km N of Rancho Cucamonga, CA
- 2.4 2km SE of Big Bear City, CA
- 1.6 9km NNE of Banning, CA
- 2.5 6km NNE of Lytle Creek, CA
- 1.9 1km SE of Fontana, CA
- 1.9 4km NW of Beaumont, CA
- 2.0 4km ESE of Yucaipa, CA
- 1.7 1km SSE of Loma Linda, CA
- 1.5 14km N of La Verne, CA
- 3.1 5km NE of Yucaipa, CA
- 1.6 10km NNW of Big Bear City, CA
- 1.7 7km SSW of Redlands, CA
- 2.1 8km NNE of Cabazon, CA
- 1.7 4km W of Calimesa, CA
- 1.8 3km NW of Cabazon, 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.