QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

4km ESE of Cholame, CA

· 13 km deep · released about 60 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Luis Obispo County 40 kmKings County 57 kmMonterey County 112 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 2.2 (md)
Depth
13 km below the surface
Felt
1 report · strongest reported intensity I
Nearest
San Luis Obispo County, 40 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1783 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 60 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 250,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 180,000× the energy of this one
  3. Around the size people start to feel M 3.0 16× the energy of this one
  4. This earthquake M 2.2 about 60 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 35.7098, -120.2583. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Luis Obispo County, CA 40 km (25 mi) NNE of here earthquakes near San Luis Obispo County
Kings County, CA 57 km (35 mi) SW of here earthquakes near Kings County
Monterey County, CA 112 km (70 mi) ESE of here earthquakes near Monterey County
San Benito County, CA 125 km (78 mi) SE of here earthquakes near San Benito County
Fresno County, CA 129 km (80 mi) SSW of here earthquakes near Fresno County

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

Aftershocks so far

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

  1. 2.4 7km WSW of Avenal, CA
  2. 2.3 7km WSW of Avenal, CA
  3. 1.5 9km NNW of Avenal, CA
  4. 1.5 9km NNW of Avenal, CA
  5. 2.2 9km NNW of Avenal, CA
  6. 1.7 8km N of Kettleman City, CA
  7. 1.6 9km NW of Avenal, CA
  8. 1.8 21km SSE of Kettleman City, CA
  9. 1.6 22km SSE of Kettleman City, CA
  10. 1.8 21km SSE of Kettleman City, CA
  11. 1.6 22km NW of Parkfield, CA
  12. 1.6 14km SSE of Avenal, CA
  13. 1.9 16km NW of Parkfield, CA
  14. 1.7 6km E of Atascadero, CA
  15. 2.0 17km NW of Parkfield, 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 4.3 on 2019-12-17 — it released about 1,400 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.