QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

10km W of Huron, CA

· 3.9 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Kings County 39 kmFresno County 78 kmSan Benito County 90 kmSan Luis Obispo County 95 kmMonterey County 99 kmMadera County 118 kmMerced 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 1.8 (md)
Depth
3.9 km below the surface
Felt
no reports yet
Nearest
Kings County, 39 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2039 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 17 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 870,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 620,000× the energy of this one
  3. Around the size people start to feel M 3.0 55× the energy of this one
  4. This earthquake M 1.8 about 17 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 36.2177, -120.2090. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Kings County, CA 39 km (24 mi) WNW of here earthquakes near Kings County
Fresno County, CA 78 km (49 mi) SW of here earthquakes near Fresno County
San Benito County, CA 90 km (56 mi) ESE of here earthquakes near San Benito County
San Luis Obispo County, CA 95 km (59 mi) NNE of here earthquakes near San Luis Obispo County
Monterey County, CA 99 km (62 mi) E of here earthquakes near Monterey County
Madera County, CA 118 km (73 mi) SSW of here earthquakes near Madera County

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

Aftershocks so far

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

  1. 1.6 21km NW of Parkfield, CA
  2. 1.6 16km NW of Parkfield, CA
  3. 1.6 20km S of Kettleman City, CA
  4. 1.9 22km NE of San Ardo, CA
  5. 1.9 22km NE of San Ardo, CA
  6. 1.5 18km NW of Parkfield, CA
  7. 1.7 11km WSW of Huron, CA
  8. 1.7 18km NW of Parkfield, CA
  9. 2.2 6km SSE of Riverdale, CA
  10. 2.0 12km NW of Parkfield, CA
  11. 1.6 18km SSE of Kettleman City, CA
  12. 3.6 11km WSW of Huron, CA
  13. 1.5 3km ENE of Coalinga, CA
  14. 2.5 22km ENE of San Ardo, CA
  15. 2.0 22km ENE of San Ardo, 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 4,700 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.