QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

7km N of Moreno Valley, CA

· 12 km deep · released about 51 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 61 kmLos Angeles County 97 kmSan Diego County 115 kmRiverside County 117 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
Magnitude
M 2.1 (ml)
Depth
12 km below the surface
Felt
no reports yet
Nearest
Orange County, 61 km SW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1539 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 51 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 210,000× the energy of this one
  3. Around the size people start to feel M 3.0 19× the energy of this one
  4. This earthquake M 2.1 about 51 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.

Where

Epicentre 33.9863, -117.2347. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 61 km (38 mi) NE of here earthquakes near Orange County
Los Angeles County, CA 97 km (61 mi) ESE of here earthquakes near Los Angeles County
San Diego County, CA 115 km (72 mi) NNW of here earthquakes near San Diego County
Riverside County, CA 117 km (73 mi) WNW of here earthquakes near Riverside County
San Bernardino County, CA 137 km (85 mi) SW of here earthquakes near San Bernardino County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 1.5 5km WSW of Fontana, CA
  2. 2.2 1km SE of Loma Linda, CA
  3. 1.9 3km ESE of Valle Vista, CA
  4. 2.0 5km NW of Mira Loma, CA
  5. 3.6 5km NW of Mira Loma, CA
  6. 2.0 9km ENE of Villa Park, CA
  7. 1.7 5km SSE of Home Gardens, CA
  8. 1.6 5km E of Cabazon, CA
  9. 2.0 2km SSE of Big Bear City, CA
  10. 1.7 1km NNW of Loma Linda, CA
  11. 1.7 1km WSW of Loma Linda, CA
  12. 1.9 4km SE of Home Gardens, CA
  13. 2.6 3km WSW of San Jacinto, CA
  14. 1.6 3km WSW of San Jacinto, CA
  15. 2.0 10km SW of Corona, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 4.5 on 2018-05-08 — it released about 3,200 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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