Earthquake · reviewed by a seismologist
M 3.0ml
27km WSW of Sea Ranch, CA
- When
- Magnitude
- M 3.0 (ml)
- Depth
- 9.2 km below the surface
- Felt
- 11 reports · strongest reported intensity III
- Nearest
- Sonoma County, 72 km E
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2157 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 11 people have reported feeling it to USGS.
How big was it?
This earthquake released about 1,100 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.
- Northridge, California 1994 M 6.7 300,000× the energy of this one
- Mineral, Virginia 2011 M 5.8 13,000× the energy of this one
- Magna, Utah 2020 M 5.7 9,400× the energy of this one
- This earthquake M 3.0 about 1,100 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 38.6292, -123.7472. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Sonoma County, CA | 72 km (45 mi) | W of here | earthquakes near Sonoma County |
| Mendocino County, CA | 93 km (58 mi) | SSW of here | earthquakes near Mendocino County |
| Lake County, CA | 102 km (63 mi) | WSW of here | earthquakes near Lake County |
| Marin County, CA | 108 km (67 mi) | NW of here | earthquakes near Marin County |
| San Francisco County, CA | 118 km (73 mi) | NNW of here | earthquakes near San Francisco County |
| Glenn County, CA | 159 km (99 mi) | SW of here | earthquakes near Glenn County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
38 earthquakes have been recorded within 50 km since this one.
- 1.8 6km E of Point Arena, CA
- 1.7 7km ESE of Point Arena, CA
- 1.9 4km ESE of Point Arena, CA
- 3.6 4km SE of Point Arena, CA
- 2.2 21km SW of Point Arena, CA
- 2.3 10km ESE of Point Arena, CA
- 1.8 6km W of Sea Ranch, CA
- 1.7 7km W of Sea Ranch, CA
- 1.6 6km W of Sea Ranch, CA
- 1.9 6km W of Sea Ranch, CA
- 1.9 8km E of Point Arena, CA
- 1.6 9km SE of Point Arena, CA
- 1.6 20km SW of Point Arena, CA
- 1.6 12km NNE of Point Arena, CA
- 1.8 32km WNW of Point Arena, 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.