Earthquake · reviewed by a seismologist
M 1.5md
9km SSW of San Ardo, CA
- When
- Magnitude
- M 1.5 (md)
- Depth
- 11 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 2423 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 5.4 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.
- Mineral, Virginia 2011 M 5.8 2,800,000× the energy of this one
- Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
- Around the size people start to feel M 3.0 180× the energy of this one
- This earthquake M 1.5 about 5.4 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 35.9425, -120.9440. 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 | 75 km (47 mi) | S of here | earthquakes near San Benito County |
| San Luis Obispo County, CA | 76 km (47 mi) | NW of here | earthquakes near San Luis Obispo County |
| Kings County, CA | 103 km (64 mi) | W of here | earthquakes near Kings County |
| Fresno County, CA | 147 km (91 mi) | SW of here | earthquakes near Fresno County |
| Santa Cruz County, CA | 152 km (95 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
54 earthquakes have been recorded within 50 km since this one.
- 3.2 16km NW of Parkfield, CA
- 1.9 22km NE of San Ardo, CA
- 2.0 16km NW of Parkfield, CA
- 2.3 23km NNE of San Ardo, CA
- 2.3 16km NW of Parkfield, CA
- 2.8 16km NW of Parkfield, CA
- 2.4 14km SW of New Idria, CA
- 2.8 19km NW of Parkfield, CA
- 1.5 7km W of Templeton, CA
- 1.6 12km NE of San Simeon, CA
- 1.5 13km NNE of Cambria, CA
- 2.2 10km NW of Parkfield, CA
- 1.6 18km NW of Parkfield, CA
- 1.6 11km WSW of Templeton, CA
- 1.8 11km WSW of Templeton, 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.