QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

10 km N of Squaw Valley, California

· 8.9 km deep · released about 20 lb of TNT

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10 km30 km60 km120 km N Fresno County 36 kmMadera County 61 kmTulare County 79 kmKings County 98 kmMariposa County 101 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 1.9 (md)
Depth
8.9 km below the surface
Felt
no reports yet
Nearest
Fresno County, 36 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3315 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 20 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 760,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 540,000× the energy of this one
  3. Around the size people start to feel M 3.0 48× the energy of this one
  4. This earthquake M 1.9 about 20 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 36.8312, -119.2578. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Fresno County, CA 36 km (23 mi) ENE of here earthquakes near Fresno County
Madera County, CA 61 km (38 mi) SE of here earthquakes near Madera County
Tulare County, CA 79 km (49 mi) NNW of here earthquakes near Tulare County
Kings County, CA 98 km (61 mi) NNE of here earthquakes near Kings County
Mariposa County, CA 101 km (63 mi) SE of here earthquakes near Mariposa 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. 2.8 14km NNE of Shaver Lake, CA
  2. 2.1 20km S of Auberry, CA
  3. 2.3 6km SE of Shaver Lake, CA
  4. 1.5 Central California
  5. 2.2 5km SW of North Fork, CA
  6. 2.0 6km SW of North Fork, CA
  7. 1.9 4km N of Shaver Lake, CA
  8. 2.4 8km ENE of North Fork, CA
  9. 1.9 8km E of Sanger, CA
  10. 1.6 7km E of North Fork, CA
  11. 2.4 7km SE of North Fork, CA
  12. 1.9 18km SSE of Shaver Lake, CA
  13. 2.8 18km SSE of Shaver Lake, CA
  14. 2.3 24km NNE of Squaw Valley, CA
  15. 1.8 12km W of Auberry, 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.