Earthquake near Yountville, CA

A magnitude 2.2 earthquake was recorded 5 km (3 mi) SW of Yountville, CA, at 3:10 pm PDT on 27 September 2026 (22:10 UTC). 3 people have reported feeling it to USGS. This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Agua Caliente, Fetters Hot Springs-Agua Caliente, Boyes Hot Springs, Eldridge, Sonoma, El Verano.

How big was it?

This earthquake released about 64 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 230,000× the energy of this one
2. Magna, Utah 2020 M 5.7 170,000× the energy of this one
3. Around the size people start to feel M 3.0 15× the energy of this one
4. This earthquake M 2.2 about 64 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.

For this area

The largest earthquake within 50 km since 2016 was M 4.4 on 2022-09-14 — about 1,800 times the energy of this one.

Before 2016, the USGS record lists 4 earthquakes of M5 or more within 50 km:

1. 6.0 The 2014 South Napa, California Earthquake · 19 km SSE of this epicentre Aug 24, 2014
2. 5.4 South of Elmira, California · 45 km E of this epicentre May 19, 1902
3. 5.3 3 km E of Bloomfield, California · 35 km W of this epicentre Oct 2, 1969
4. 5.3 Northern California · 37 km W of this epicentre Oct 2, 1969

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 38.3683, -122.4070. Map © OpenStreetMap contributors.

Nearby places

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

1. 1.8 4 km NW of Santa Rosa, CA 06:13 UTC
2. 1.7 3 km SSW of Anderson Springs, CA 04:30 UTC
3. 2.2 8 km W of Cotati, CA 21:47 UTC
4. 2.0 7 km WSW of Calistoga, CA 18:47 UTC
5. 2.6 6 km W of Yountville, CA 16:06 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 01:05 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

Revisions

USGS refines a solution as more stations report. Every change we have seen is listed here.

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.