QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

15km E of New Idria, CA

· 12 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Benito County 56 kmKings County 74 kmMonterey County 76 kmFresno County 84 kmMerced County 87 kmMadera County 109 kmSan Luis Obispo County 117 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
12 km below the surface
Felt
no reports yet
Nearest
San Benito County, 56 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1520 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 14 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 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 790,000× the energy of this one
  3. Around the size people start to feel M 3.0 70× the energy of this one
  4. This earthquake M 1.8 about 14 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 36.4363, -120.5025. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Benito County, CA 56 km (35 mi) ESE of here earthquakes near San Benito County
Kings County, CA 74 km (46 mi) WNW of here earthquakes near Kings County
Monterey County, CA 76 km (47 mi) ENE of here earthquakes near Monterey County
Fresno County, CA 84 km (52 mi) WSW of here earthquakes near Fresno County
Merced County, CA 87 km (54 mi) SSE of here earthquakes near Merced County
Madera County, CA 109 km (68 mi) SW of here earthquakes near Madera County

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

Aftershocks so far

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

  1. 1.8 11km SE of Pinnacles, CA
  2. 2.1 11km SE of Pinnacles, CA
  3. 1.8 12km SE of Pinnacles, CA
  4. 1.9 9km NW of Lemoore Station, CA
  5. 1.7 8km NE of Coalinga, CA
  6. 1.5 9km NE of Coalinga, CA
  7. 1.7 6km SSW of Huron, CA
  8. 1.7 10km NNW of Avenal, CA
  9. 2.5 22km NE of San Ardo, CA
  10. 1.9 22km ENE of San Ardo, CA
  11. 1.6 12km SE of Pinnacles, CA
  12. 1.7 13km SE of Pinnacles, CA
  13. 2.0 7km NNE of Coalinga, CA
  14. 1.6 12km SE of Pinnacles, CA
  15. 2.1 14km W of New Idria, 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 4.0 on 2018-11-27 — it released about 2,200 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.