QuakeIndex

Earthquake · reviewed by a seismologist

M 2.0ml

Earthquake near Redlands, CA

No earthquake was likely felt in Redlands in the 24 hours to 6:31 am PST (14:31 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 2.0 earthquake was recorded 4 km (2 mi) southwest of Redlands, CA, at 9:18 pm PST on 3 January 2018 (05:18 UTC), 15 km deep.

USGS: 4km SW of Redlands, CA

in Redlands, CA · 110 km (69 mi) E of Los Angeles, CA

9:18 pm PST, Jan 3, 2018 · · 15 km deep · released about 32 lb of TNT

Every earthquake near Redlands Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 66 kmLos Angeles County 98 kmRiverside County 117 kmSan Diego County 119 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
9:18 pm PST on 3 January 2018 ()
Where
4 km (2 mi) southwest of Redlands, CA · earthquakes near Redlands
Magnitude
M 2.0 (ml)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Orange County, 66 km SW
Nearest mapped fault
Crafton Hills 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 3230 days ago

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 7 km (4 mi) from the epicentre. In Redlands, 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: Redlands 4 km, intensity II · Loma Linda 5 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 32 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 470,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 330,000× the energy of this one
  3. Around the size people start to feel M 3.0 30× the energy of this one
  4. This earthquake M 2.0 about 32 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 3,600 times the energy of this one.

Before 2016, the USGS record lists 24 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.7 The 1918 San Jacinto, California Earthquake · 37 km SE of this epicentre
  2. 6.3 The 1992 Big Bear, California Earthquake · 40 km ENE of this epicentre
  3. 6.2 3 km SE of San Bernardino, California · 8 km NW of this epicentre
  4. 6.0 The 1910 Lake Elsinore, California Earthquake · 41 km SSW of this epicentre
  5. 5.6 7km ENE of Running Springs, CA · 28 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 34.0333, -117.2125. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Orange County, CA 66 km (41 mi) SW earthquakes near Orange County
Los Angeles County, CA 98 km (61 mi) W earthquakes near Los Angeles County
Riverside County, CA 117 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 132 km (82 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

52 earthquakes have been recorded within 50 km since this one.

  1. 2.6 3km ESE of Loma Linda, CA
  2. 1.5 3km ESE of Loma Linda, CA
  3. 1.7 6km SSW of Redlands, CA
  4. 1.5 1km NE of Calimesa, CA
  5. 1.5 4km ENE of Cabazon, CA
  6. 3.3 3km S of Mentone, CA
  7. 2.1 8km NNW of Cabazon, CA
  8. 1.5 9km N of Big Bear City, CA
  9. 2.2 8km NE of Cabazon, CA
  10. 2.1 5km SSE of Mentone, CA
  11. 2.2 10km E of Running Springs, CA
  12. 3.5 2km N of Lakeland Village, CA
  13. 2.1 2km N of Lakeland Village, CA
  14. 2.2 2km N of Lakeland Village, CA
  15. 1.9 2km SW of Lake Elsinore, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.