Earthquake · reviewed by a seismologist
M 1.6md
Earthquake near Agua Caliente, CA
No earthquake was likely felt in Agua Caliente in the 24 hours to 5:45 am PST (13:45 UTC). The last one was M 1.7, 11 km (7 mi) NNW, at 12:33 am PDT on 25 October 2026, estimated intensity II (weak) in town. Every earthquake near Agua Caliente
This page: a magnitude 1.6 earthquake was recorded 6 km (4 mi) west of Agua Caliente, CA, at 12:07 pm PDT on 12 April 2019 (19:07 UTC), 11 km deep.
USGS: 5km SSW of Glen Ellen, CA
11 km (7 mi) NNE of Petaluma, CA · 62 km (39 mi) N of San Francisco, CA
- When
- 12:07 pm PDT on 12 April 2019 ()
- Where
- 6 km (4 mi) west of Agua Caliente, CA · earthquakes near Agua Caliente
- Magnitude
- M 1.6 (md)
- Depth
- 11 km below the surface
- Felt
- no reports yet
- Nearest
- Napa County, 28 km NE
- Nearest mapped fault
- Bennett Valley fault, under 1 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2770 days ago
Earthquake alerts for Agua Caliente, CA
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth it was probably too small to be felt, even directly above it. In Agua Caliente, 6 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Earthquakes near other towns within 30 km: Eldridge, Fetters Hot Springs-Agua Caliente, El Verano, Boyes Hot Springs, Temelec, Kenwood.
How big was it?
This earthquake released about 6.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,400,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
- Around the size people start to feel M 3.0 150× the energy of this one
- This earthquake M 1.6 about 6.4 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
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:
- 6.0 The 2014 South Napa, California Earthquake · 25 km ESE of this epicentre
- 5.3 3 km E of Bloomfield, California · 22 km W of this epicentre
- 5.3 Northern California · 23 km W of this epicentre
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 38.3285, -122.5568. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Napa County, CA | 28 km (18 mi) | NE | earthquakes near Napa County |
| Marin County, CA | 35 km (22 mi) | SSW | earthquakes near Marin County |
| Sonoma County, CA | 39 km (24 mi) | NW | earthquakes near Sonoma County |
| Solano County, CA | 54 km (34 mi) | E | earthquakes near Solano County |
| Yolo County, CA | 69 km (43 mi) | NE | earthquakes near Yolo County |
| Contra Costa County, CA | 70 km (43 mi) | SE | earthquakes near Contra Costa County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
45 earthquakes have been recorded within 50 km since this one.
- 2.2 6km WSW of Yountville, CA
- 2.4 3km SW of Anderson Springs, CA
- 1.7 18km E of Angwin, CA
- 1.6 3km SE of The Geysers, CA
- 1.5 13km E of Angwin, CA
- 1.9 12km NNE of Angwin, CA
- 1.5 13km ESE of Angwin, CA
- 1.7 4km SW of Anderson Springs, CA
- 1.5 2km NW of Roseland, CA
- 2.3 8km SW of Calistoga, CA
- 1.9 4km NNW of Larkfield-Wikiup, CA
- 1.9 2km SSE of Crockett, CA
- 2.2 3km WSW of American Canyon, CA
- 1.9 2km NNW of Crockett, CA
- 1.7 7km N of Kenwood, 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.
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.