QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

17km N of New Idria, CA

· 10 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Benito County 38 kmMonterey County 68 kmMerced County 70 kmFresno County 93 kmKings County 94 kmMadera County 108 kmStanislaus County 115 kmSanta Clara 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
10 km below the surface
Felt
no reports yet
Nearest
San Benito County, 38 km W
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1860 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 13 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 1,200,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 840,000× the energy of this one
  3. Around the size people start to feel M 3.0 75× the energy of this one
  4. This earthquake M 1.8 about 13 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 36.5658, -120.6663. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Benito County, CA 38 km (23 mi) E of here earthquakes near San Benito County
Monterey County, CA 68 km (43 mi) ENE of here earthquakes near Monterey County
Merced County, CA 70 km (44 mi) S of here earthquakes near Merced County
Fresno County, CA 93 km (58 mi) WSW of here earthquakes near Fresno County
Kings County, CA 94 km (58 mi) NW of here earthquakes near Kings County
Madera County, CA 108 km (67 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

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

  1. 2.3 11km SE of Pinnacles, CA
  2. 1.9 6km ENE of Pinnacles, CA
  3. 2.3 2km N of Pinnacles, CA
  4. 2.3 8km ESE of Pinnacles, CA
  5. 2.0 7km NW of Pinnacles, CA
  6. 2.1 7km NNW of Pinnacles, CA
  7. 2.2 7km NNW of Pinnacles, CA
  8. 1.6 7km WNW of Pinnacles, CA
  9. 2.1 6km NNW of Pinnacles, CA
  10. 2.1 5km NE of New Idria, CA
  11. 2.0 11km SE of Pinnacles, CA
  12. 2.2 7km N of Pinnacles, CA
  13. 2.2 6km NNW of Pinnacles, CA
  14. 2.1 24km NE of King City, CA
  15. 1.8 22km NNE 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 2021-01-02 — it released about 7,200 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.