QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8md

11km SE of Pinnacles, CA

· 8.0 km deep · released about 13 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Benito County 17 kmMonterey County 35 kmMerced County 86 kmSanta Clara County 102 kmSanta Cruz County 105 kmKings County 119 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
8.0 km below the surface
Felt
2 reports · strongest reported intensity II
Nearest
San Benito County, 17 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1427 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.

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 36.4667, -121.0462. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
San Benito County, CA 17 km (10 mi) SSE of here earthquakes near San Benito County
Monterey County, CA 35 km (22 mi) NE of here earthquakes near Monterey County
Merced County, CA 86 km (53 mi) SSW of here earthquakes near Merced County
Santa Clara County, CA 102 km (63 mi) SE of here earthquakes near Santa Clara County
Santa Cruz County, CA 105 km (65 mi) SE of here earthquakes near Santa Cruz County
Kings County, CA 119 km (74 mi) WNW of here earthquakes near Kings County

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

Aftershocks so far

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

  1. 1.8 13km NW of Pinnacles, CA
  2. 2.3 4km SE of Tres Pinos, CA
  3. 2.6 10km S of Tres Pinos, CA
  4. 2.7 16km NW of Pinnacles, CA
  5. 2.1 17km NW of Pinnacles, CA
  6. 2.1 8km NW of Pinnacles, CA
  7. 2.1 23km ESE of Tres Pinos, CA
  8. 2.1 15km NE of San Ardo, CA
  9. 1.8 7km NW of Pinnacles, CA
  10. 1.8 22km NE of San Lucas, CA
  11. 2.3 3km NNE of Pinnacles, CA
  12. 2.1 3km NE of Pinnacles, CA
  13. 2.2 12km NW of Pinnacles, CA
  14. 2.2 23km SE of Pinnacles, CA
  15. 1.6 11km ESE of Tres Pinos, 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 28,000 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.