QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

10km WNW of New Idria, CA

· 15 km deep · released about 17 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Benito County 33 kmMonterey County 54 kmMerced County 83 kmKings County 96 kmFresno County 106 kmSanta Clara 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
15 km below the surface
Felt
no reports yet
Nearest
San Benito County, 33 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1760 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 5.8 900,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 640,000× the energy of this one
  3. Around the size people start to feel M 3.0 57× 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 36.4492, -120.7755. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Benito County, CA 33 km (21 mi) ESE of here earthquakes near San Benito County
Monterey County, CA 54 km (33 mi) ENE of here earthquakes near Monterey County
Merced County, CA 83 km (52 mi) S of here earthquakes near Merced County
Kings County, CA 96 km (59 mi) WNW of here earthquakes near Kings County
Fresno County, CA 106 km (66 mi) WSW of here earthquakes near Fresno County
Santa Clara County, CA 118 km (74 mi) SE of here earthquakes near Santa Clara County

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

Aftershocks so far

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

  1. 1.6 7km ESE of Pinnacles, CA
  2. 1.5 5km NE of Pinnacles, CA
  3. 1.6 4km NNW of Pinnacles, CA
  4. 2.2 17km SE of Pinnacles, CA
  5. 1.9 24km E of San Ardo, CA
  6. 1.9 3km NNW of Pinnacles, CA
  7. 2.1 7km NNW of Pinnacles, CA
  8. 1.6 2km NNE of Pinnacles, CA
  9. 2.4 22km NE of San Lucas, CA
  10. 1.7 2km NE of Pinnacles, CA
  11. 2.5 16km N of Coalinga, CA
  12. 2.5 5km NNW of Pinnacles, CA
  13. 2.1 21km SE of Pinnacles, CA
  14. 1.7 10km SE of Pinnacles, CA
  15. 1.7 4km W of Pinnacles, 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 4.7 on 2019-10-15 — it released about 21,000 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.