QuakeIndex

quarry blast · reviewed by a seismologist

M 1.9ml

5km NNW of Lake Elsinore, CA

· -0.5 km deep · released about 18 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 41 kmSan Diego County 93 kmLos Angeles County 101 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 1.9 (ml)
Depth
-0.5 km below the surface
Felt
no reports yet
Nearest
Orange County, 41 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3232 days ago

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

USGS catalogues this as quarry blast, not an earthquake.

How big was it?

This earthquake released about 18 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.

  1. Mineral, Virginia 2011 M 5.8 840,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 600,000× the energy of this one
  3. Around the size people start to feel M 3.0 53× the energy of this one
  4. This earthquake M 1.9 about 18 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 33.7138, -117.3387. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 41 km (25 mi) E of here earthquakes near Orange County
San Diego County, CA 93 km (58 mi) NW of here earthquakes near San Diego County
Los Angeles County, CA 101 km (63 mi) ESE of here earthquakes near Los Angeles County

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

Aftershocks so far

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

  1. 1.7 4km S of Redlands, CA
  2. 1.6 9km SE of Valle Vista, CA
  3. 2.4 3km SW of San Bernardino, CA
  4. 1.6 3km E of Mission Viejo, CA
  5. 2.2 3km NNW of Glen Avon, CA
  6. 2.0 7km SSE of Redlands, CA
  7. 1.6 4km SE of Home Gardens, CA
  8. 2.5 2km E of San Jacinto, CA
  9. 1.7 2km ESE of Loma Linda, CA
  10. 2.0 8km SE of Valle Vista, CA
  11. 2.8 6km NNW of San Jacinto, CA
  12. 1.7 4km NW of Corona, CA
  13. 2.1 2km SE of Mentone, CA
  14. 1.6 4km SSE of Banning, CA
  15. 1.7 7km NE of Beaumont, 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 4.4 on 2016-01-06 — it released about 6,500 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.