Earthquake · reviewed by a seismologist
M 2.8ml
Earthquake near Loma Linda, CA
No earthquake was likely felt in Loma Linda in the 24 hours to 10:27 pm PST (06:27 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 2.8 earthquake was recorded 4 km (2 mi) southeast of Loma Linda, CA, at 10:21 pm PDT on 5 September 2016 (05:21 UTC), 16 km deep. 16 people have reported feeling it to USGS.
USGS: 4km SE of Loma Linda, CA
6 km (4 mi) WSW of Redlands, CA · 109 km (68 mi) E of Los Angeles, CA
- When
- 10:21 pm PDT on 5 September 2016 ()
- Where
- 4 km (2 mi) southeast of Loma Linda, CA · earthquakes near Loma Linda
- Magnitude
- M 2.8 (ml)
- Depth
- 16 km below the surface
- Felt
- 16 reports · strongest reported intensity III
- Nearest
- Orange County, 64 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 3715 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 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 20 km (12 mi) from the epicentre. In Loma Linda, 4 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: Loma Linda 4 km, intensity II · Redlands 6 km, intensity II · Colton 9 km, intensity II · Moreno Valley 10 km, intensity II · Mentone 10 km, intensity II · San Bernardino 11 km, intensity II · Highland 12 km, intensity II · Rialto 16 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 400 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 38,000× the energy of this one
- Magna, Utah 2020 M 5.7 27,000× the energy of this one
- Around the size people start to feel M 3.0 2.4× the energy of this one
- This earthquake M 2.8 about 400 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 290 times the energy of this one.
Before 2016, the USGS record lists 23 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 The 1918 San Jacinto, California Earthquake · 38 km SE of this epicentre
- 6.3 The 1992 Big Bear, California Earthquake · 42 km ENE of this epicentre
- 6.2 3 km SE of San Bernardino, California · 8 km NNW 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 · 30 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 34.0250, -117.2305. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 64 km (40 mi) | SW | earthquakes near Orange County |
| Los Angeles County, CA | 97 km (60 mi) | WNW | earthquakes near Los Angeles County |
| Riverside County, CA | 118 km (73 mi) | ESE | earthquakes near Riverside County |
| San Diego County, CA | 119 km (74 mi) | SSE | earthquakes near San Diego County |
| San Bernardino County, CA | 133 km (83 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
47 earthquakes have been recorded within 50 km since this one.
- 1.5 7km SSE of Home Gardens, CA
- 1.6 12km NE of Yucaipa, CA
- 2.9 1km E of Loma Linda, CA
- 2.1 16km NW of Morongo Valley, CA
- 2.4 1km SSE of Loma Linda, CA
- 1.7 13km NNE of Cabazon, CA
- 2.0 2km E of Loma Linda, CA
- 1.8 4km WNW of Cabazon, CA
- 1.6 4km SE of Home Gardens, CA
- 1.6 7km SSE of Home Gardens, CA
- 1.7 6km S of Calimesa, CA
- 1.7 10km NE of Running Springs, CA
- 1.6 5km SE of Home Gardens, CA
- 2.4 4km N of Loma Linda, CA
- 1.9 10km SSE of Lucerne Valley, 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.