QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

28km NE of North Fork, CA

· 30 km deep · released about 19 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Madera County 46 kmMariposa County 58 kmMono County 68 kmFresno County 79 kmTuolumne County 90 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
30 km below the surface
Felt
no reports yet
Nearest
Madera County, 46 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1620 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 19 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 5.8 810,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 580,000× the energy of this one
  3. Around the size people start to feel M 3.0 51× the energy of this one
  4. This earthquake M 1.9 about 19 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 37.4057, -119.2935. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Madera County, CA 46 km (28 mi) ENE of here earthquakes near Madera County
Mariposa County, CA 58 km (36 mi) ESE of here earthquakes near Mariposa County
Mono County, CA 68 km (42 mi) SSW of here earthquakes near Mono County
Fresno County, CA 79 km (49 mi) NNE of here earthquakes near Fresno County
Tuolumne County, CA 90 km (56 mi) SE of here earthquakes near Tuolumne County
Calaveras County, CA 141 km (88 mi) SE of here earthquakes near Calaveras County

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

Aftershocks so far

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

  1. 1.8 9km E of Mammoth Lakes, CA
  2. 1.6 10km E of Mammoth Lakes, CA
  3. 1.5 8km E of Mammoth Lakes, CA
  4. 1.8 9km E of Mammoth Lakes, CA
  5. 1.8 8km E of Mammoth Lakes, CA
  6. 1.8 8km E of Mammoth Lakes, CA
  7. 2.6 9km E of Mammoth Lakes, CA
  8. 1.7 8km E of Mammoth Lakes, CA
  9. 2.3 8km E of Mammoth Lakes, CA
  10. 2.7 8km E of Mammoth Lakes, CA
  11. 2.6 9km E of Mammoth Lakes, CA
  12. 2.2 8km E of Mammoth Lakes, CA
  13. 2.0 8km E of Mammoth Lakes, CA
  14. 1.9 9km E of Mammoth Lakes, CA
  15. 1.9 8km E of Mammoth Lakes, 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 4.4 on 2020-02-01 — it released about 6,700 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.