QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7ml

8km ESE of Vandenberg Village, CA

· 6.9 km deep · released about 11 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Santa Barbara County 36 kmSan Luis Obispo County 78 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 1.7 (ml)
Depth
6.9 km below the surface
Felt
no reports yet
Nearest
Santa Barbara County, 36 km ESE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2985 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 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 930,000× the energy of this one
  3. Around the size people start to feel M 3.0 83× the energy of this one
  4. This earthquake M 1.7 about 11 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 34.6865, -120.3835. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Santa Barbara County, CA 36 km (22 mi) WNW of here earthquakes near Santa Barbara County
San Luis Obispo County, CA 78 km (49 mi) S of here earthquakes near San Luis Obispo County
Ventura County, CA 120 km (75 mi) WNW of here earthquakes near Ventura 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. 2.1 21km SSW of Lompoc, CA
  2. 2.7 6km NNE of Los Alamos, CA
  3. 1.9 22km S of Solvang, CA
  4. 1.8 9km NE of Los Alamos, CA
  5. 2.4 4km NE of Orcutt, CA
  6. 1.7 7km ENE of Los Olivos, CA
  7. 1.8 19km SSW of Lompoc, CA
  8. 2.6 20km SSW of Lompoc, CA
  9. 1.7 19km SSW of Lompoc, CA
  10. 1.8 12km NNE of Los Olivos, CA
  11. 2.6 12km SSW of Lompoc, CA
  12. 2.1 13km SSW of Lompoc, CA
  13. 1.6 13km NNE of Los Alamos, CA
  14. 2.0 13km SSW of Lompoc, CA
  15. 2.0 8km ESE of Santa Ynez, 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 2017-10-26 — it released about 8,200 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.