QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

22 km NW of Parkfield, California

· 3.9 km deep · released about 16 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Monterey County 67 kmKings County 71 kmSan Luis Obispo County 75 kmSan Benito County 76 kmFresno County 116 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
1 report · strongest reported intensity I
Nearest
Monterey County, 67 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3260 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.

How big was it?

This earthquake released about 16 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 5.8 970,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 680,000× the energy of this one
  3. Around the size people start to feel M 3.0 61× the energy of this one
  4. This earthquake M 1.8 about 16 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 36.0468, -120.6052. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Monterey County, CA 67 km (42 mi) ESE of here earthquakes near Monterey County
Kings County, CA 71 km (44 mi) W of here earthquakes near Kings County
San Luis Obispo County, CA 75 km (46 mi) N of here earthquakes near San Luis Obispo County
San Benito County, CA 76 km (47 mi) SE of here earthquakes near San Benito County
Fresno County, CA 116 km (72 mi) SW of here earthquakes near Fresno County

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

Aftershocks so far

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

  1. 1.8 22km ENE of San Ardo, CA
  2. 1.8 4km SSE of San Ardo, CA
  3. 1.5 12km NNW of Coalinga, CA
  4. 2.1 12km NNW of Coalinga, CA
  5. 1.7 12km NNW of Coalinga, CA
  6. 2.1 14km N of Coalinga, CA
  7. 2.6 13km N of Coalinga, CA
  8. 2.1 18km SSW of Cantua Creek, CA
  9. 1.6 24km SE of Pinnacles, CA
  10. 2.4 2 km NW of Parkfield, California
  11. 2.7 2 km WNW of Parkfield, California
  12. 1.6 26 km NE of San Lucas, California
  13. 1.6 23 km NNE of San Lucas, California
  14. 2.0 23 km NW of Parkfield, California
  15. 1.5 23 km ENE of San Lucas, California

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.