Earthquake · reviewed by a seismologist
M 1.5md
11km NNW of Point Arena, CA
- When
- Magnitude
- M 1.5 (md)
- Depth
- 8.6 km below the surface
- Felt
- no reports yet
- Nearest
- Mendocino County, 53 km NNE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2574 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 5.7 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 2,600,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
- Around the size people start to feel M 3.0 170× the energy of this one
- This earthquake M 1.5 about 5.7 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 39.0070, -123.7237. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Mendocino County, CA | 53 km (33 mi) | SSW of here | earthquakes near Mendocino County |
| Lake County, CA | 85 km (53 mi) | W of here | earthquakes near Lake County |
| Sonoma County, CA | 87 km (54 mi) | NW of here | earthquakes near Sonoma County |
| Glenn County, CA | 132 km (82 mi) | WSW of here | earthquakes near Glenn County |
| Marin County, CA | 136 km (85 mi) | NW of here | earthquakes near Marin County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
32 earthquakes have been recorded within 50 km since this one.
- 2.0 12km WNW of Redwood Valley, CA
- 1.5 14km ESE of Boonville, CA
- 2.6 5km SW of Redwood Valley, CA
- 2.1 12km S of Boonville, CA
- 2.4 12km SE of Point Arena, CA
- 1.5 17km ESE of Boonville, CA
- 1.6 12km WNW of Redwood Valley, CA
- 2.2 16km ESE of Boonville, CA
- 1.8 16km ESE of Navarro Head, CA
- 2.6 12km N of Point Arena, CA
- 2.2 12km N of Point Arena, CA
- 2.3 13km N of Point Arena, CA
- 1.6 4km SE of Boonville, CA
- 1.6 23km SSW of Willits, CA
- 1.6 15km ESE of Navarro Head, 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.