Earthquake · reviewed by a seismologist
M 2.8md
2km ENE of Aromas, CA
- When
- Magnitude
- M 2.8 (md)
- Depth
- 5.2 km below the surface
- Felt
- 61 reports · strongest reported intensity III
- Nearest
- Santa Cruz County, 37 km WNW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2289 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 61 people have reported feeling it to USGS.
How big was it?
This earthquake released about 530 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 29,000× the energy of this one
- Magna, Utah 2020 M 5.7 20,000× the energy of this one
- Around the size people start to feel M 3.0 1.8× the energy of this one
- This earthquake M 2.8 about 530 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 36.8925, -121.6202. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Santa Cruz County, CA | 37 km (23 mi) | ESE of here | earthquakes near Santa Cruz County |
| Santa Clara County, CA | 37 km (23 mi) | S of here | earthquakes near Santa Clara County |
| San Benito County, CA | 57 km (35 mi) | WNW of here | earthquakes near San Benito County |
| Monterey County, CA | 77 km (48 mi) | NNW of here | earthquakes near Monterey County |
| Merced County, CA | 86 km (54 mi) | WSW of here | earthquakes near Merced County |
| Alameda County, CA | 88 km (55 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
36 earthquakes have been recorded within 50 km since this one.
- 3.2 2km E of Aromas, CA
- 1.9 8km SSE of Gilroy, CA
- 1.7 4km SSW of San Juan Bautista, CA
- 3.1 5km NE of Tres Pinos, CA
- 2.2 13km ESE of Seven Trees, CA
- 1.6 10km NW of Pinnacles, CA
- 1.5 12km SSW of Tres Pinos, CA
- 1.6 14km SSE of Tres Pinos, CA
- 1.7 2km ENE of Aromas, CA
- 1.5 13km S of Tres Pinos, CA
- 1.7 28km SW of Gustine, CA
- 1.9 12km S of Tres Pinos, CA
- 3.2 12km S of Tres Pinos, CA
- 2.0 5km SE of Tres Pinos, CA
- 1.8 9km ENE of Morgan Hill, 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 660 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.