QuakeIndex

quarry blast · reviewed by a seismologist

M 1.9ml

5km NNW of Lake Elsinore, CA

· -0.5 km deep · released about 21 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 40 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, 40 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1754 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 21 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 5.8 710,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 500,000× the energy of this one
  3. Around the size people start to feel M 3.0 45× the energy of this one
  4. This earthquake M 1.9 about 21 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 33.7080, -117.3432. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 40 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

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

  1. 1.7 3km ENE of Moreno Valley, CA
  2. 1.5 2km S of Valle Vista, CA
  3. 3.0 2km SSW of Valle Vista, CA
  4. 1.7 2km NNW of Loma Linda, CA
  5. 1.6 2km ESE of Loma Linda, CA
  6. 2.0 4km SE of Home Gardens, CA
  7. 2.0 4km ENE of Colton, CA
  8. 1.9 1km SE of Loma Linda, CA
  9. 1.6 8km SSE of Home Gardens, CA
  10. 1.8 1km WSW of Valle Vista, CA
  11. 1.6 14km SSE of Valle Vista, CA
  12. 1.6 3km W of Redlands, CA
  13. 3.4 3km SW of Redlands, CA
  14. 2.6 4km NW of Fontana, CA
  15. 1.7 7km SE of Valle Vista, 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.