Earthquake · reviewed by a seismologist
M 2.1md
14 km WSW of Santa Cruz, CA
- When
- Magnitude
- M 2.1 (md)
- Depth
- 10 km below the surface
- Felt
- 1 report · strongest reported intensity II
- Nearest
- Santa Cruz County, 18 km NE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 769 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 44 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 5.8 340,000× the energy of this one
- Magna, Utah 2020 M 5.7 240,000× the energy of this one
- Around the size people start to feel M 3.0 22× the energy of this one
- This earthquake M 2.1 about 44 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 36.9160, -122.1688. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Santa Cruz County, CA | 18 km (11 mi) | SW of here | earthquakes near Santa Cruz County |
| Santa Clara County, CA | 54 km (34 mi) | SW of here | earthquakes near Santa Clara County |
| San Mateo County, CA | 58 km (36 mi) | SSE of here | earthquakes near San Mateo County |
| Alameda County, CA | 84 km (52 mi) | SSW of here | earthquakes near Alameda County |
| San Benito County, CA | 102 km (64 mi) | WNW of here | earthquakes near San Benito County |
| Monterey County, CA | 107 km (66 mi) | NW of here | earthquakes near Monterey 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.
- 1.7 9 km SW of La Selva Beach, CA
- 1.6 10 km SSW of La Selva Beach, CA
- 1.8 7 km WSW of Gilroy, CA
- 2.1 8 km WSW of Gilroy, CA
- 1.6 5 km S of Portola Valley, CA
- 1.6 5 km S of Portola Valley, CA
- 2.5 5 km S of Portola Valley, CA
- 1.6 7 km W of Gilroy, CA
- 2.1 8 km ENE of Interlaken, CA
- 2.0 2 km ENE of Aromas, CA
- 1.9 3 km S of Los Altos Hills, CA
- 2.9 1 km E of Aromas, CA
- 1.9 1 km NNE of Aromas, CA
- 2.3 2 km ENE of Aromas, CA
- 1.5 10 km of Boulder Creek, 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.