Earthquake · reviewed by a seismologist
M 1.9md
6km NNE of Lake Pillsbury, CA
- When
- Magnitude
- M 1.9 (md)
- Depth
- 10 km below the surface
- Felt
- no reports yet
- Nearest
- Lake County, 43 km SSE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2071 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 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 39.4638, -122.9407. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Lake County, CA | 43 km (27 mi) | NNW of here | earthquakes near Lake County |
| Mendocino County, CA | 43 km (27 mi) | E of here | earthquakes near Mendocino County |
| Glenn County, CA | 49 km (30 mi) | WSW of here | earthquakes near Glenn County |
| Colusa County, CA | 68 km (42 mi) | WNW of here | earthquakes near Colusa County |
| Tehama County, CA | 95 km (59 mi) | SW of here | earthquakes near Tehama County |
| Sonoma County, CA | 104 km (65 mi) | N of here | earthquakes near Sonoma County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
53 earthquakes have been recorded within 50 km since this one.
- 3.9 15km NNW of Lake Pillsbury, CA
- 1.6 9km W of North Lakeport, CA
- 2.0 12km NNE of Brooktrails, CA
- 1.8 16km SE of Lake Pillsbury, CA
- 1.7 8km ESE of Willits, CA
- 1.5 6km E of Redwood Valley, CA
- 1.5 4km ESE of Laytonville, CA
- 1.5 8km NNW of Redwood Valley, CA
- 1.5 12km N of Brooktrails, CA
- 1.7 4km S of Redwood Valley, CA
- 1.8 2km N of Lake Pillsbury, CA
- 1.5 12km WNW of Upper Lake, CA
- 1.7 13km W of Lakeport, CA
- 1.5 10km ESE of Willits, CA
- 1.7 7km E of Willits, 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 5.1 on 2016-08-10 — it released about 70,000 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.