QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9md

8km WNW of Del Monte Forest, CA

· 14 km deep · released about 25 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Santa Cruz County 45 kmSanta Clara County 75 kmMonterey County 76 kmSan Benito County 85 kmSan Mateo County 95 kmAlameda 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 1.9 (md)
Depth
14 km below the surface
Felt
no reports yet
Nearest
Santa Cruz County, 45 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1979 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 25 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 620,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 440,000× the energy of this one
  3. Around the size people start to feel M 3.0 39× the energy of this one
  4. This earthquake M 1.9 about 25 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 36.6052, -122.0368. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Santa Cruz County, CA 45 km (28 mi) S of here earthquakes near Santa Cruz County
Santa Clara County, CA 75 km (47 mi) SSW of here earthquakes near Santa Clara County
Monterey County, CA 76 km (47 mi) WNW of here earthquakes near Monterey County
San Benito County, CA 85 km (53 mi) W of here earthquakes near San Benito County
San Mateo County, CA 95 km (59 mi) SSE of here earthquakes near San Mateo County
Alameda County, CA 116 km (72 mi) S of here earthquakes near Alameda County

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

Aftershocks so far

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

  1. 2.0 5km ESE of Aromas, CA
  2. 2.5 3km ENE of Aromas, CA
  3. 1.6 15km SE of Point Sur, CA
  4. 2.1 14km SE of Point Sur, CA
  5. 2.0 15km SE of Point Sur, CA
  6. 2.1 4km W of San Juan Bautista, CA
  7. 2.1 5km S of San Juan Bautista, CA
  8. 1.6 2km E of Aromas, CA
  9. 1.8 3km E of Aromas, CA
  10. 2.9 4km SSW of San Juan Bautista, CA
  11. 2.1 6km S of San Juan Bautista, CA
  12. 2.5 16km SSW of Bonny Doon, CA
  13. 1.7 5km S of San Juan Bautista, CA
  14. 2.8 12km W of Moss Landing, CA
  15. 1.6 12km W of Moss Landing, 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 4.2 on 2021-01-17 — it released about 2,500 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.