Earthquake · reviewed by a seismologist
M 2.1ml
21km SSW of Lompoc, CA
- When
- Magnitude
- M 2.1 (ml)
- Depth
- 0.8 km below the surface
- Felt
- 1 report · strongest reported intensity II
- Nearest
- Santa Barbara County, 47 km E
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2304 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.
How big was it?
This earthquake released about 38 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 390,000× the energy of this one
- Magna, Utah 2020 M 5.7 280,000× the energy of this one
- Around the size people start to feel M 3.0 25× the energy of this one
- This earthquake M 2.1 about 38 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 34.4625, -120.5387. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Santa Barbara County, CA | 47 km (29 mi) | W of here | earthquakes near Santa Barbara County |
| San Luis Obispo County, CA | 103 km (64 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
48 earthquakes have been recorded within 50 km since this one.
- 1.6 8 km SE of Los Alamos, CA
- 1.5 7 km NW of Los Olivos, CA
- 1.7 13 km W of Isla Vista, CA
- 2.1 36 km SW of Lompoc, CA
- 1.8 10km W of Orcutt, CA
- 1.5 17km SSE of Lompoc, CA
- 2.0 9km NW of Los Alamos, CA
- 1.8 8km NNW of Los Olivos, CA
- 1.6 9km E of Los Alamos, CA
- 1.9 6km ENE of Vandenberg Village, CA
- 1.6 8km N of Los Alamos, CA
- 2.0 28km SSW of Lompoc, CA
- 1.8 8km WNW of Orcutt, CA
- 1.8 5km SSE of Los Alamos, CA
- 1.9 6km ENE 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.
For this area
The largest earthquake within 50 km in our catalogue was M 4.3 on 2017-10-26 — it released about 2,500 times the energy of this one.
From the QuakeIndex catalogue, built from the USGS FDSN event service.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.