Earthquake · reviewed by a seismologist
M 2.3md
11km WSW of Morro Bay, CA
- When
- Magnitude
- M 2.3 (md)
- Depth
- 9.7 km below the surface
- Felt
- 2 reports · strongest reported intensity I
- Nearest
- San Luis Obispo County, 47 km E
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1843 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.
How big was it?
This earthquake released about 82 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
- Magna, Utah 2020 M 5.7 130,000× the energy of this one
- Around the size people start to feel M 3.0 12× the energy of this one
- This earthquake M 2.3 about 82 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 35.3350, -120.9642. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| San Luis Obispo County, CA | 47 km (29 mi) | W of here | earthquakes near San Luis Obispo County |
| Monterey County, CA | 106 km (66 mi) | SSE of here | earthquakes near Monterey County |
| Santa Barbara County, CA | 122 km (76 mi) | NW of here | earthquakes near Santa Barbara County |
| Kings County, CA | 132 km (82 mi) | SW of here | earthquakes near Kings County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
37 earthquakes have been recorded within 50 km since this one.
- 1.6 5km WSW of Paso Robles, CA
- 1.7 4km WSW of Paso Robles, CA
- 1.6 9km N of Cambria, CA
- 1.9 7km W of Templeton, CA
- 1.7 12km NNE of Cambria, CA
- 1.6 2km SE of Cayucos, CA
- 1.8 15km ENE of San Simeon, CA
- 1.5 7km NNE of San Simeon, CA
- 1.6 8km NE of San Simeon, CA
- 2.2 8km NE of San Simeon, CA
- 2.1 8km NE of San Simeon, CA
- 2.5 8km NE of San Simeon, CA
- 1.6 10km SW of Templeton, CA
- 3.3 8km NE of San Simeon, CA
- 2.0 8km NNE of San Simeon, 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
- 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.