Earthquake · reviewed by a seismologist
M 2.1md
6 km ESE of Pontiac, Missouri
- When
- Magnitude
- M 2.1 (md)
- Depth
- 12 km below the surface
- Felt
- 2 reports · strongest reported intensity III
- Nearest
- Ozark County, 20 km NNE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 403 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 2 people have reported feeling it to USGS.
How big was it?
This earthquake released about 47 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 320,000× the energy of this one
- Magna, Utah 2020 M 5.7 230,000× the energy of this one
- Around the size people start to feel M 3.0 20× the energy of this one
- This earthquake M 2.1 about 47 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 36.4847, -92.5400. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Ozark County, MO | 20 km (12 mi) | SSW of here | earthquakes near Ozark County |
| Marion County, AR | 27 km (17 mi) | NNE of here | earthquakes near Marion County |
| Baxter County, AR | 29 km (18 mi) | NW of here | earthquakes near Baxter County |
| Taney County, MO | 49 km (30 mi) | ESE of here | earthquakes near Taney County |
| Douglas County, MO | 51 km (32 mi) | S of here | earthquakes near Douglas County |
| Boone County, AR | 52 km (32 mi) | ENE of here | earthquakes near Boone County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
1 earthquake has been recorded within 50 km since this one.
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.