Earthquake · reviewed by a seismologist
M 1.8md
32km NE of North Fork, CA
- When
- Magnitude
- M 1.8 (md)
- Depth
- 17 km below the surface
- Felt
- no reports yet
- Nearest
- Madera County, 50 km WSW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1387 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 13 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,200,000× the energy of this one
- Magna, Utah 2020 M 5.7 840,000× the energy of this one
- Around the size people start to feel M 3.0 75× the energy of this one
- This earthquake M 1.8 about 13 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 37.4512, -119.2748. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Madera County, CA | 50 km (31 mi) | ENE of here | earthquakes near Madera County |
| Mariposa County, CA | 58 km (36 mi) | ESE of here | earthquakes near Mariposa County |
| Mono County, CA | 63 km (39 mi) | SW of here | earthquakes near Mono County |
| Fresno County, CA | 84 km (52 mi) | NNE of here | earthquakes near Fresno County |
| Tuolumne County, CA | 88 km (55 mi) | SE of here | earthquakes near Tuolumne County |
| Calaveras County, CA | 139 km (87 mi) | SE of here | earthquakes near Calaveras County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
58 earthquakes have been recorded within 50 km since this one.
- 1.6 13km NW of Toms Place, CA
- 1.6 9km SSE of Mammoth Lakes, CA
- 1.5 13km ESE of Mammoth Lakes, CA
- 2.1 16km E of Yosemite Valley, CA
- 2.5 6km WNW of Toms Place, CA
- 1.6 5km W of Toms Place, CA
- 2.1 9km WSW of Toms Place, CA
- 1.5 9km SSE of Mammoth Lakes, CA
- 1.8 12km W of Toms Place, CA
- 1.5 9km SSE of Mammoth Lakes, CA
- 1.8 4km WNW of Mammoth Lakes, CA
- 1.6 29km NE of Oakhurst, CA
- 1.6 11km ENE of Mammoth Lakes, CA
- 1.8 9km SSE of Mammoth Lakes, CA
- 2.8 9km SSE of Mammoth Lakes, 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 4.4 on 2020-02-01 — it released about 9,800 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.