Earthquake · reviewed by a seismologist
M 1.8md
3km SSE of San Ardo, CA
- When
- Magnitude
- M 1.8 (md)
- Depth
- 7.9 km below the surface
- Felt
- no reports yet
- Nearest
- Monterey County, 47 km NW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2579 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 17 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 870,000× the energy of this one
- Magna, Utah 2020 M 5.7 620,000× the energy of this one
- Around the size people start to feel M 3.0 55× the energy of this one
- This earthquake M 1.8 about 17 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 35.9950, -120.8892. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Monterey County, CA | 47 km (29 mi) | SE of here | earthquakes near Monterey County |
| San Benito County, CA | 71 km (44 mi) | SSE of here | earthquakes near San Benito County |
| San Luis Obispo County, CA | 78 km (49 mi) | NNW of here | earthquakes near San Luis Obispo County |
| Kings County, CA | 97 km (60 mi) | W of here | earthquakes near Kings County |
| Fresno County, CA | 140 km (87 mi) | SW of here | earthquakes near Fresno County |
| Santa Cruz County, CA | 151 km (94 mi) | SE of here | earthquakes near Santa Cruz County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
44 earthquakes have been recorded within 50 km since this one.
- 1.8 9km NW of Parkfield, CA
- 2.7 12km NW of Parkfield, CA
- 1.7 12km NW of Parkfield, CA
- 2.1 11km N of Cambria, CA
- 1.6 8km W of San Ardo, CA
- 1.7 22km ENE of San Lucas, CA
- 1.7 21km NE of San Lucas, CA
- 1.6 22km WSW of New Idria, CA
- 1.6 19km SE of Pinnacles, CA
- 2.3 15km NW of Parkfield, CA
- 1.8 21km NW of Parkfield, CA
- 1.9 19km NW of Parkfield, CA
- 1.8 16km NW of Parkfield, CA
- 1.7 16km NW of Parkfield, CA
- 2.3 14km NE 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.