QuakeIndex

Earthquake · reviewed by a seismologist

M 2.4ml

14km SSW of Lompoc, CA

· 4.5 km deep · released about 130 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Santa Barbara County 45 kmSan Luis Obispo County 96 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 2.4 (ml)
Depth
4.5 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
Santa Barbara County, 45 km E
Nearest mapped fault
Santa Ynez fault, 5 km from its surface trace — near is not the same as on
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1513 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 130 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 120,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 83,000× the energy of this one
  3. Around the size people start to feel M 3.0 7.4× the energy of this one
  4. This earthquake M 2.4 about 130 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 34.5268, -120.5347. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Santa Barbara County, CA 45 km (28 mi) W of here earthquakes near Santa Barbara County
San Luis Obispo County, CA 96 km (60 mi) S of here earthquakes near San Luis Obispo County

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

Aftershocks so far

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

  1. 1.8 19km SSW of Lompoc, CA
  2. 2.6 20km SSW of Lompoc, CA
  3. 1.7 19km SSW of Lompoc, CA
  4. 2.6 12km SSW of Lompoc, CA
  5. 2.1 13km SSW of Lompoc, CA
  6. 1.6 13km NNE of Los Alamos, CA
  7. 2.0 13km SSW of Lompoc, CA
  8. 2.0 8km ESE of Santa Ynez, CA
  9. 2.0 31 km SW of Lompoc, CA
  10. 2.6 13km SSW of Lompoc, CA
  11. 2.1 5km SSW of Orcutt, CA
  12. 1.7 9km SSE of Santa Ynez, CA
  13. 2.6 52km WSW of Lompoc, CA
  14. 2.2 7km ENE of Los Olivos, CA
  15. 2.2 7km ENE of Los Olivos, 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 730 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.