Earthquake · reviewed by a seismologist
M 3.0ml
22km W of Bonny Doon, CA
- When
- Magnitude
- M 3.0 (ml)
- Depth
- 8.8 km below the surface
- Felt
- 59 reports · strongest reported intensity III
- Nearest
- Santa Cruz County, 35 km ESE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2131 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 59 people have reported feeling it to USGS.
How big was it?
This earthquake released about 990 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 340,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 15,000× the energy of this one
- Magna, Utah 2020 M 5.7 11,000× the energy of this one
- This earthquake M 3.0 about 990 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 37.0745, -122.3892. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Santa Cruz County, CA | 35 km (21 mi) | WNW of here | earthquakes near Santa Cruz County |
| San Mateo County, CA | 38 km (24 mi) | S of here | earthquakes near San Mateo County |
| Santa Clara County, CA | 64 km (40 mi) | WSW of here | earthquakes near Santa Clara County |
| Alameda County, CA | 76 km (47 mi) | SSW of here | earthquakes near Alameda County |
| San Francisco County, CA | 92 km (57 mi) | SE of here | earthquakes near San Francisco County |
| Contra Costa County, CA | 102 km (63 mi) | SSW of here | earthquakes near Contra Costa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
50 earthquakes have been recorded within 50 km since this one.
- 1.6 6km SSE of Portola Valley, CA
- 2.5 6km SSE of Portola Valley, CA
- 2.2 34km W of Bonny Doon, CA
- 2.0 4km SSE of Highlands-Baywood Park, CA
- 1.9 11km SW of Bonny Doon, CA
- 1.7 22km W of Bonny Doon, CA
- 2.7 5km SSW of Lexington Hills, CA
- 1.6 3km SSW of Half Moon Bay, CA
- 2.2 3km SSW of Half Moon Bay, CA
- 1.6 3km SSW of Half Moon Bay, CA
- 1.7 4km S of Portola Valley, CA
- 1.7 4km S of Portola Valley, CA
- 1.7 23km WNW of Bonny Doon, CA
- 1.6 3km W of Fruitdale, CA
- 1.5 11km WSW of Saratoga, 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.