Earthquake · reviewed by a seismologist
M 2.9md
Earthquake near Clearlake Oaks, CA
USGS: 15 km ENE of Clearlake Oaks, California
- When
- 12:19 pm PDT on 26 September 2016 ()
- Where
- 16 km (10 mi) ENE of Clearlake Oaks, CA · earthquakes near Clearlake Oaks
- Magnitude
- M 2.9 (md)
- Depth
- -0.8 km below the surface
- Felt
- 1 report · strongest reported intensity III
- Nearest
- Lake County, 21 km W
- Nearest mapped fault
- Bartlett Springs fault system, 5 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 3521 days ago
A magnitude 2.9 earthquake was recorded 16 km (10 mi) ENE of Clearlake Oaks, CA, at 12:19 pm PDT on 26 September 2016 (19:19 UTC). 1 person has reported feeling it to USGS. This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
Earthquakes near other towns within 30 km: Clearlake, Lower Lake, Clear Lake Riviera, Soda Bay.
How big was it?
This earthquake released about 720 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 21,000× the energy of this one
- Magna, Utah 2020 M 5.7 15,000× the energy of this one
- Around the size people start to feel M 3.0 1.3× the energy of this one
- This earthquake M 2.9 about 720 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 5.1 on 2016-08-10 — about 1,800 times the energy of this one.
Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.
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 39.0823, -122.5028. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Lake County, CA | 21 km (13 mi) | W | earthquakes near Lake County |
| Colusa County, CA | 25 km (16 mi) | ENE | earthquakes near Colusa County |
| Glenn County, CA | 58 km (36 mi) | N | earthquakes near Glenn County |
| Napa County, CA | 66 km (41 mi) | SSE | earthquakes near Napa County |
| Yolo County, CA | 69 km (43 mi) | SE | earthquakes near Yolo County |
| Sutter County, CA | 69 km (43 mi) | E | earthquakes near Sutter County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
60 earthquakes have been recorded within 50 km since this one.
- 2.4 7 km S of Cobb, California
- 1.9 4 km W of Cobb, California
- 1.6 7 km WSW of Cobb, California
- 2.4 7 km WSW of Cobb, California
- 1.9 5 km WNW of Cobb, California
- 1.6 9 km W of Cobb, California
- 1.5 7 km W of Cobb, California
- 1.8 9 km WNW of Cobb, California
- 2.1 8 km W of Cobb, California
- 2.0 Northern California
- 1.7 7 km W of Cobb, California
- 1.7 2 km SSW of Cobb, California
- 1.5 5 km WNW of Cobb, California
- 1.6 8 km W of Cobb, California
- 1.8 9 km WNW of Cobb, California
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.