QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

11km SSW of Fairmead, CA

· 18 km deep · released about 44 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Merced County 48 kmMadera County 51 kmFresno County 59 kmMariposa County 72 kmSan Benito County 85 kmStanislaus County 92 kmKings County 109 kmTuolumne County 118 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 2.1 (md)
Depth
18 km below the surface
Felt
no reports yet
Nearest
Merced County, 48 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1853 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 44 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 340,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 240,000× the energy of this one
  3. Around the size people start to feel M 3.0 22× the energy of this one
  4. This earthquake M 2.1 about 44 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 36.9862, -120.2535. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Merced County, CA 48 km (30 mi) ESE of here earthquakes near Merced County
Madera County, CA 51 km (32 mi) WSW of here earthquakes near Madera County
Fresno County, CA 59 km (37 mi) WNW of here earthquakes near Fresno County
Mariposa County, CA 72 km (45 mi) SSW of here earthquakes near Mariposa County
San Benito County, CA 85 km (53 mi) ENE of here earthquakes near San Benito County
Stanislaus County, CA 92 km (57 mi) SE of here earthquakes near Stanislaus County

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

Aftershocks so far

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

  1. 1.7 22km ENE of Le Grand, CA
  2. 3.0 19km SSW of Mariposa, CA
  3. 1.7 5km ENE of Bonadelle Ranchos-Madera Ranchos, CA
  4. 1.8 5km ENE of Bonadelle Ranchos-Madera Ranchos, CA
  5. 2.3 21km S of Mariposa, CA
  6. 2.0 5km ENE of Bonadelle Ranchos-Madera Ranchos, CA
  7. 2.1 17km SSW of Mariposa, CA
  8. 2.2 7km ENE of Bonadelle Ranchos-Madera Ranchos, CA
  9. 2.0 5km ENE of Bonadelle Ranchos-Madera Ranchos, CA
  10. 1.8 5km E of Bonadelle Ranchos-Madera Ranchos, CA
  11. 2.1 6km ENE of Bonadelle Ranchos-Madera Ranchos, CA
  12. 2.0 7km S of South Dos Palos, CA
  13. 2.1 20km ENE of Le Grand, CA
  14. 2.0 6km NW of Friant, CA
  15. 2.5 21km S of Mariposa, 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.