Earthquake · reviewed by a seismologist
M 1.9ml
Earthquake near Redlands, CA
No earthquake was likely felt in Redlands in the 24 hours to 12:14 am PST (08:14 UTC). The last one was M 2.0, 9 km (5 mi) SSE, at 10:33 pm PST on 2 November 2026, estimated intensity II (weak) in town. Every earthquake near Redlands
This page: a magnitude 1.9 earthquake was recorded in Redlands, CA, at 12:28 pm PDT on 24 March 2018 (19:28 UTC), 11 km deep.
USGS: 2km NE of Redlands, CA
in Redlands, CA · 114 km (71 mi) E of Los Angeles, CA
- When
- 12:28 pm PDT on 24 March 2018 ()
- Where
- in Redlands, CA · earthquakes near Redlands
- Magnitude
- M 1.9 (ml)
- Depth
- 11 km below the surface
- Felt
- no reports yet
- Nearest
- Orange County, 71 km SW
- Nearest mapped fault
- Crafton Hills 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 3030 days ago
Earthquake alerts for Redlands, 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 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 10 km (6 mi) from the epicentre. 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: Redlands in town, intensity II · Mentone 3 km, intensity II · Highland 8 km, intensity II · Loma Linda 9 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 23 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 5.8 660,000× the energy of this one
- Magna, Utah 2020 M 5.7 470,000× the energy of this one
- Around the size people start to feel M 3.0 42× the energy of this one
- This earthquake M 1.9 about 23 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 5,100 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 · 39 km SSE of this epicentre
- 6.3 The 1992 Big Bear, California Earthquake · 35 km ENE of this epicentre
- 6.2 3 km SE of San Bernardino, California · 9 km WNW of this epicentre
- 6.0 The 1910 Lake Elsinore, California Earthquake · 46 km SSW of this epicentre
- 5.6 7km ENE of Running Springs, CA · 23 km NNE 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 34.0672, -117.1705. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 71 km (44 mi) | SW | earthquakes near Orange County |
| Los Angeles County, CA | 101 km (63 mi) | W | earthquakes near Los Angeles County |
| Riverside County, CA | 114 km (71 mi) | ESE | earthquakes near Riverside County |
| San Diego County, CA | 122 km (76 mi) | SSE | earthquakes near San Diego County |
| San Bernardino County, CA | 126 km (78 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
54 earthquakes have been recorded within 50 km since this one.
- 3.2 11km N of Cabazon, CA
- 2.4 11km NNE of Cabazon, CA
- 4.5 11km N of Cabazon, CA
- 2.2 2km E of Big Bear Lake, CA
- 1.8 3km NNW of Loma Linda, CA
- 1.6 6km NNW of Fontana, CA
- 1.5 1km W of Loma Linda, CA
- 1.9 3km N of Colton, CA
- 1.6 1km SSE of Loma Linda, CA
- 2.1 9km SW of Morongo Valley, CA
- 2.6 7km NNW of Fontana, CA
- 2.1 7km NNW of Fontana, CA
- 1.7 8km E of Running Springs, CA
- 1.6 5km SE of Home Gardens, CA
- 1.8 14km WNW of Morongo 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.