Earthquake · reviewed by a seismologist
M 2.5md
4km NW of Aromas, CA
- When
- Magnitude
- M 2.5 (md)
- Depth
- 11 km below the surface
- Felt
- 10 reports · strongest reported intensity IV
- Nearest
- Santa Cruz County, 32 km WNW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1611 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 78,000× the energy of this one
- Magna, Utah 2020 M 5.7 55,000× the energy of this one
- Around the size people start to feel M 3.0 4.9× 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 36.9152, -121.6668. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Santa Cruz County, CA | 32 km (20 mi) | ESE of here | earthquakes near Santa Cruz County |
| Santa Clara County, CA | 34 km (21 mi) | S of here | earthquakes near Santa Clara County |
| San Benito County, CA | 62 km (38 mi) | WNW of here | earthquakes near San Benito County |
| Monterey County, CA | 81 km (51 mi) | NNW of here | earthquakes near Monterey County |
| San Mateo County, CA | 84 km (52 mi) | SE of here | earthquakes near San Mateo County |
| Alameda County, CA | 84 km (52 mi) | SSE of here | earthquakes near Alameda County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
40 earthquakes have been recorded within 50 km since this one.
- 2.0 4km S of San Juan Bautista, CA
- 3.3 4km S of San Juan Bautista, CA
- 1.6 9km ENE of Gilroy, CA
- 1.8 6km SW of Gilroy, CA
- 1.6 8km ENE of Gilroy, CA
- 2.1 12km S of Tres Pinos, CA
- 2.2 8km ENE of Gilroy, CA
- 1.7 4km NNW of Hollister, CA
- 2.2 5km ESE of Aromas, CA
- 3.6 4km ENE of Corralitos, CA
- 1.6 1km WNW of San Juan Bautista, CA
- 2.6 6km SW of Gilroy, CA
- 2.1 6km SW of Gilroy, CA
- 2.0 2km WNW of San Juan Bautista, CA
- 1.5 12km ESE of Alum Rock, 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.
For this area
The largest earthquake within 50 km in our catalogue was M 4.7 on 2019-10-15 — it released about 1,800 times the energy of this one.
From the QuakeIndex catalogue, built from the USGS FDSN event service.
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.