Earthquake · reviewed by a seismologist
M 1.9md
4km NE of Vallejo, CA
- When
- Magnitude
- M 1.9 (md)
- Depth
- 6.8 km below the surface
- Felt
- 5 reports · strongest reported intensity II
- Nearest
- Solano County, 27 km ENE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2719 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 5 people have reported feeling it to USGS.
How big was it?
This earthquake released about 19 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 810,000× the energy of this one
- Magna, Utah 2020 M 5.7 580,000× the energy of this one
- Around the size people start to feel M 3.0 51× the energy of this one
- This earthquake M 1.9 about 19 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 38.1423, -122.2102. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Solano County, CA | 27 km (17 mi) | WSW of here | earthquakes near Solano County |
| Contra Costa County, CA | 34 km (21 mi) | NW of here | earthquakes near Contra Costa County |
| Napa County, CA | 42 km (26 mi) | SSE of here | earthquakes near Napa County |
| Marin County, CA | 48 km (30 mi) | ENE of here | earthquakes near Marin County |
| Alameda County, CA | 61 km (38 mi) | NNW of here | earthquakes near Alameda County |
| Yolo County, CA | 65 km (41 mi) | SSW of here | earthquakes near Yolo County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
51 earthquakes have been recorded within 50 km since this one.
- 1.6 4km ESE of Kenwood, CA
- 2.4 4km NNW of Green Valley, CA
- 1.6 2km E of Berkeley, CA
- 1.6 3km ENE of Pittsburg, CA
- 2.0 3km SSW of Alameda, CA
- 2.1 5km ENE of Kenwood, CA
- 2.5 3km N of San Leandro, CA
- 2.0 5km SSE of Pittsburg, CA
- 1.6 4km ESE of Moraga, CA
- 1.5 3km NE of Alamo, CA
- 1.8 2km NE of San Ramon, CA
- 1.8 2km NE of San Ramon, CA
- 2.0 9km N of Pittsburg, CA
- 1.8 11km N of Bay Point, CA
- 1.5 2km SW of Clayton, 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 4.4 on 2018-01-04 — it released about 6,000 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.