5km ENE of Kenwood, CA

2019-01-24 16:50 UTC · 7.6 km deep · released about 72 lb of TNT

Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.

When: 2019-01-24 16:50 UTC
Magnitude: M 2.3 (md)
Depth: 7.6 km below the surface
Felt: no reports yet
Nearest: Napa County, 17 km ENE
Status: Reviewed by a seismologist

USGS · last changed by USGS 2752 days ago · we first saw it 2752 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 72 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 210,000× the energy of this one
Magna, Utah 2020 M 5.7 150,000× the energy of this one
Around the size people start to feel M 3.0 13× the energy of this one
This earthquake M 2.3 about 72 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

Map loads when it scrolls into view

Epicentre 38.4280, -122.4865. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction
Napa County, CA	17 km (10 mi)	WSW of here	earthquakes near Napa County
Sonoma County, CA	40 km (25 mi)	ESE of here	earthquakes near Sonoma County
Marin County, CA	48 km (30 mi)	NNE of here	earthquakes near Marin County
Solano County, CA	51 km (32 mi)	WNW of here	earthquakes near Solano County
Yolo County, CA	58 km (36 mi)	WSW of here	earthquakes near Yolo County
Contra Costa County, CA	73 km (46 mi)	NW 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

25 earthquakes have been recorded within 50 km since this one.

2.1 3km W of Anderson Springs, CA 13:23 UTC
1.6 3km SSW of Anderson Springs, CA 13:56 UTC
1.6 1km NNW of The Geysers, CA 05:46 UTC
2.7 1km NE of The Geysers, CA 05:43 UTC
1.6 4km NNW of The Geysers, CA 08:57 UTC
1.6 3km ESE of The Geysers, CA 09:49 UTC
1.8 13km E of Yountville, CA 01:06 UTC
1.5 3km WSW of Anderson Springs, CA 17:41 UTC
2.0 2km W of Green Valley, CA 23:41 UTC
1.7 2km ESE of The Geysers, CA 21:03 UTC
2.3 4km SE of The Geysers, CA 17:42 UTC
2.4 2km SSW of The Geysers, CA 09:37 UTC
2.0 8km ENE of Angwin, CA 21:59 UTC
1.9 5km ENE of Angwin, CA 21:05 UTC
2.1 4km SSE of The Geysers, CA 20:52 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 12:09 UTC. 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 4.2 on 2018-01-18 — it released about 900 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.