QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

Earthquake near Redlands, CA

No earthquake was likely felt in Redlands in the 24 hours to 6:22 am PST (14:22 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 1.6 earthquake was recorded 6 km (4 mi) south of Redlands, CA, at 10:59 pm PDT on 16 March 2020 (05:59 UTC), 15 km deep.

USGS: 6km S of Redlands, CA

6 km (3 mi) S of Redlands, CA · 114 km (71 mi) E of Los Angeles, CA

10:59 pm PDT, Mar 16, 2020 · · 15 km deep · released about 8.7 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 102 kmRiverside County 113 kmSan Diego County 115 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
10:59 pm PDT on 16 March 2020 ()
Where
6 km (4 mi) south of Redlands, CA · earthquakes near Redlands
Magnitude
M 1.6 (ml)
Depth
15 km below the surface
Felt
no reports yet
Nearest
Orange County, 66 km WSW
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 1380 days ago

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. In Redlands, 6 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.

Earthquakes near other towns within 30 km: Mentone, Moreno Valley, Loma Linda, Calimesa, Grand Terrace, Yucaipa.

How big was it?

This earthquake released about 8.7 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 8.7 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 4.5 on 2018-05-08 — about 19,000 times the energy of this one.

Before 2016, the USGS record lists 23 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.7 The 1918 San Jacinto, California Earthquake · 33 km SE of this epicentre
  2. 6.3 The 1992 Big Bear, California Earthquake · 39 km NE of this epicentre
  3. 6.2 3 km SE of San Bernardino, California · 12 km NW of this epicentre
  4. 6.0 The 1910 Lake Elsinore, California Earthquake · 39 km SSW of this epicentre
  5. 5.6 7km ENE of Running Springs, CA · 29 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 34.0043, -117.1795. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Orange County, CA 66 km (41 mi) WSW earthquakes near Orange County
Los Angeles County, CA 102 km (63 mi) WNW earthquakes near Los Angeles County
Riverside County, CA 113 km (70 mi) ESE earthquakes near Riverside County
San Diego County, CA 115 km (72 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

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

  1. 2.0 3km NNW of Fontana, CA
  2. 1.5 3km SE of Home Gardens, CA
  3. 1.5 5km S of Lytle Creek, CA
  4. 1.8 5km S of Lytle Creek, CA
  5. 2.5 2km NNE of Lake Arrowhead, CA
  6. 1.5 9km NE of Trabuco Canyon, CA
  7. 2.0 4km SE of Home Gardens, CA
  8. 1.7 3km ESE of Home Gardens, CA
  9. 2.5 8km SW of Calimesa, CA
  10. 1.5 6km NW of Calimesa, CA
  11. 1.9 10km N of Big Bear City, CA
  12. 1.6 3km SE of Home Gardens, CA
  13. 1.6 4km N of Norco, CA
  14. 1.6 8km SSE of Home Gardens, CA
  15. 1.6 1km SW of Devore, 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.