QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

Earthquake near Los Olivos, CA

No earthquake was likely felt in Los Olivos in the 24 hours to 1:15 pm PST (21:15 UTC). The last one was M 2.2, 14 km (8 mi) NW, at 8:51 am PDT on 23 July 2026, estimated intensity II (weak) in town. Every earthquake near Los Olivos

This page: a magnitude 1.5 earthquake was recorded 7 km (5 mi) northwest of Los Olivos, CA, at 7:13 am PDT on 11 September 2023 (14:13 UTC), 2.6 km deep.

USGS: 7 km NW of Los Olivos, CA

35 km (22 mi) SE of Santa Maria, CA · 124 km (77 mi) SW of Bakersfield, CA

7:13 am PDT, Sep 11, 2023 · · 2.6 km deep · released about 6.2 lb of TNT

Every earthquake near Los Olivos Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Santa Barbara County 23 kmSan Luis Obispo County 79 kmVentura County 102 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
7:13 am PDT on 11 September 2023 ()
Where
7 km (5 mi) northwest of Los Olivos, CA · earthquakes near Los Olivos
Magnitude
M 1.5 (ml)
Depth
2.6 km below the surface
Felt
no reports yet
Nearest
Santa Barbara County, 23 km SSE
Nearest mapped fault
Los Alamos fault, 2 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 1158 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth, people at rest would likely notice it out to about 10 km (6 mi) from the epicentre. In Los Olivos, 7 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Earthquakes near other towns within 30 km: Los Alamos, Buellton, Santa Ynez, Solvang, Mission Hills, Vandenberg Village.

How big was it?

This earthquake released about 6.2 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.5 about 6.2 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.

For this area

The largest earthquake within 50 km since 2016 was M 4.1 on 2017-05-17 — about 6,000 times the energy of this one.

Before 2016, the USGS record lists 5 earthquakes of M5 or more within 50 km:

  1. 6.9 The 1927 Lompoc, California Earthquake · 50 km W of this epicentre
  2. 5.8 Near Los Alamos, California · 23 km WNW of this epicentre
  3. 5.8 Near Los Alamos, California · 13 km W of this epicentre
  4. 5.7 Near Los Alamos, California · 14 km SSW of this epicentre
  5. 5.0 5 km SSW of Nipomo, California · 44 km NW of this epicentre

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 34.7202, -120.1620. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Santa Barbara County, CA 23 km (14 mi) SSE earthquakes near Santa Barbara County
San Luis Obispo County, CA 79 km (49 mi) NNW earthquakes near San Luis Obispo County
Ventura County, CA 102 km (64 mi) ESE earthquakes near Ventura County

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

Aftershocks so far

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

  1. 2.5 5 km NE of Lompoc, CA
  2. 2.1 10 km NE of Santa Ynez, CA
  3. 2.2 11 km NE of Santa Ynez, CA
  4. 1.8 7 km SSE of Los Alamos, CA
  5. 2.0 10 km NW of Los Alamos, CA
  6. 2.2 18 km W of Isla Vista, CA
  7. 2.8 18 km W of Isla Vista, CA
  8. 2.5 6 km SE of Orcutt, CA
  9. 2.2 5 km WNW of Santa Barbara, CA
  10. 1.8 26 km ENE of Nipomo, CA
  11. 2.4 26 km S of Solvang, CA
  12. 2.1 9 km NW of Los Alamos, CA
  13. 1.7 11 km N of Santa Barbara, CA
  14. 2.0 11 km N of Santa Barbara, CA
  15. 2.3 7 km SSW of Lompoc, 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.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.