QuakeIndex

Earthquake · reviewed by a seismologist

M 2.2md

10 km WSW of Chowchilla, CA

· 22 km deep · released about 62 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Merced County 36 kmMadera County 56 kmMariposa County 68 kmFresno County 71 kmStanislaus County 79 kmSan Benito County 83 kmTuolumne County 111 kmSanta Clara County 120 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
22 km below the surface
Felt
no reports yet
Nearest
Merced County, 36 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 426 days ago

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

How big was it?

This earthquake released about 62 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 5.8 240,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 170,000× the energy of this one
  3. Around the size people start to feel M 3.0 15× the energy of this one
  4. This earthquake M 2.2 about 62 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 37.0720, -120.3525. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Merced County, CA 36 km (22 mi) ESE of here earthquakes near Merced County
Madera County, CA 56 km (35 mi) WSW of here earthquakes near Madera County
Mariposa County, CA 68 km (42 mi) SW of here earthquakes near Mariposa County
Fresno County, CA 71 km (44 mi) WNW of here earthquakes near Fresno County
Stanislaus County, CA 79 km (49 mi) SE of here earthquakes near Stanislaus County
San Benito County, CA 83 km (52 mi) NE of here earthquakes near San Benito County

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

Aftershocks so far

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

  1. 1.5 15 km WSW of Firebaugh, CA
  2. 1.8 14 km SSW of Bootjack, CA
  3. 2.0 7 km ENE of Bonadelle Ranchos-Madera Ranchos, CA
  4. 1.5 12 km SW of Mendota, CA
  5. 1.8 6 km ENE of Bonadelle Ranchos-Madera Ranchos, CA
  6. 2.7 8 km NW of Yosemite Lakes, CA
  7. 1.9 6 km ENE of Bonadelle Ranchos-Madera Ranchos, CA
  8. 2.2 15 km SSW of Fairmead, CA
  9. 1.7 6 km ENE of Bonadelle Ranchos-Madera Ranchos, CA
  10. 2.2 17 km NW of Yosemite Lakes, CA
  11. 2.1 17 km NW of Yosemite Lakes, CA
  12. 2.3 10 km WSW of Mariposa, CA
  13. 2.0 17 km SSW of South Dos Palos, CA
  14. 2.8 22 km SW of South Dos Palos, CA
  15. 2.1 7 km ENE of Bonadelle Ranchos-Madera Ranchos, 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.