QuakeIndex

Earthquake · reviewed by a seismologist

M 2.6ml

3km E of Anaheim, CA

· 5.4 km deep · released about 270 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Orange County 19 kmLos Angeles County 55 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 2.6 (ml)
Depth
5.4 km below the surface
Felt
419 reports · strongest reported intensity III
Nearest
Orange County, 19 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1835 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 419 people have reported feeling it to USGS.

How big was it?

This earthquake released about 270 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 57,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 40,000× the energy of this one
  3. Around the size people start to feel M 3.0 3.6× the energy of this one
  4. This earthquake M 2.6 about 270 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 33.8305, -117.8543. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Orange County, CA 19 km (12 mi) NNW of here earthquakes near Orange County
Los Angeles County, CA 55 km (34 mi) SE of here earthquakes near Los Angeles County
Ventura County, CA 132 km (82 mi) ESE of here earthquakes near Ventura County
San Diego County, CA 134 km (84 mi) NW of here earthquakes near San Diego County

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

Aftershocks so far

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

  1. 1.5 2km WSW of Costa Mesa, CA
  2. 1.8 4km SE of Home Gardens, CA
  3. 2.1 0km W of Brea, CA
  4. 1.6 1km NNW of South Gate, CA
  5. 1.6 22km SSW of Seal Beach, CA
  6. 2.5 4km SE of Ontario, CA
  7. 1.7 6km NW of Corona, CA
  8. 1.9 3km WSW of Compton, CA
  9. 1.7 5km ENE of Villa Park, CA
  10. 1.8 11km NNE of Trabuco Canyon, CA
  11. 1.7 8km E of Yorba Linda, CA
  12. 1.6 4km SE of Home Gardens, CA
  13. 1.5 7km NW of Rancho Cucamonga, CA
  14. 1.5 5km NW of Fontana, CA
  15. 1.8 5km NNW of Fontana, 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 2020-09-19 — it released about 730 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.