Earthquake · reviewed by a seismologist
M 2.5md
16km SSW of Bonny Doon, CA
- When
- Magnitude
- M 2.5 (md)
- Depth
- 5.1 km below the surface
- Felt
- 10 reports · strongest reported intensity II
- Nearest
- Santa Cruz County, 22 km ENE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1744 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 10 people have reported feeling it to USGS.
How big was it?
This earthquake released about 190 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 80,000× the energy of this one
- Magna, Utah 2020 M 5.7 57,000× the energy of this one
- Around the size people start to feel M 3.0 5.1× the energy of this one
- This earthquake M 2.5 about 190 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 36.9082, -122.2165. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Santa Cruz County, CA | 22 km (14 mi) | WSW of here | earthquakes near Santa Cruz County |
| San Mateo County, CA | 58 km (36 mi) | SSE of here | earthquakes near San Mateo County |
| Santa Clara County, CA | 58 km (36 mi) | SW of here | earthquakes near Santa Clara County |
| Alameda County, CA | 86 km (54 mi) | SSW of here | earthquakes near Alameda County |
| San Benito County, CA | 106 km (66 mi) | WNW of here | earthquakes near San Benito County |
| Monterey County, CA | 110 km (68 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
38 earthquakes have been recorded within 50 km since this one.
- 1.8 6km SSE of Portola Valley, CA
- 2.0 6km SSE of Portola Valley, CA
- 2.1 6km SSE of Portola Valley, CA
- 1.9 6km SSE of Portola Valley, CA
- 1.7 6km SSE of Portola Valley, CA
- 1.5 14km WSW of Portola Valley, CA
- 2.4 13km WSW of Santa Cruz, CA
- 1.6 3km SSW of Monte Sereno, CA
- 1.8 6km SSE of Portola Valley, CA
- 1.9 6km SSE of Portola Valley, CA
- 1.9 6km SSE of Portola Valley, CA
- 1.7 7km SSE of Portola Valley, CA
- 1.8 6km SSE of Portola Valley, CA
- 1.6 5km NNW of Aromas, CA
- 2.0 6km SSE of Portola Valley, 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.