QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

5km SE of Lytle Creek, CA

· 9.1 km deep · released about 860 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 68 kmLos Angeles County 74 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 3.0 (ml)
Depth
9.1 km below the surface
Felt
125 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
Orange County, 68 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3390 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 125 people have reported feeling it to USGS.

How big was it?

This earthquake released about 860 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 390,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 18,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 12,000× the energy of this one
  4. This earthquake M 3.0 about 860 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 34.2282, -117.4598. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 68 km (42 mi) NNE of here earthquakes near Orange County
Los Angeles County, CA 74 km (46 mi) E of here earthquakes near Los Angeles County
San Bernardino County, CA 136 km (85 mi) WSW 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

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

  1. 1.5 0km SSW of Loma Linda, CA
  2. 1.5 6km E of Running Springs, CA
  3. 2.2 8km N of Rancho Cucamonga, CA
  4. 1.5 6km E of Running Springs, CA
  5. 1.5 5km SE of Home Gardens, CA
  6. 2.8 2km SE of Loma Linda, CA
  7. 1.6 2km ESE of Loma Linda, CA
  8. 1.8 5km SSE of Lytle Creek, CA
  9. 2.1 12km SE of Running Springs, CA
  10. 1.6 14km NNE of Running Springs, CA
  11. 1.6 1 km ESE of Loma Linda, California
  12. 1.5 6 km SSE of Lytle Creek, California
  13. 2.0 8 km ENE of San Antonio Heights, California
  14. 1.6 3 km ENE of El Cerrito Corona, California
  15. 1.6 9 km E of Running Springs, California

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.