quarry blast · reviewed by a seismologist
M 2.1ml
8 km SSW of Roosevelt, Oklahoma
- When
- Magnitude
- M 2.1 (ml)
- Depth
- 0.0 km below the surface
- Felt
- 1 report · strongest reported intensity I
- Nearest
- Kiowa County, 17 km NNE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1227 days ago
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 1 person has reported feeling it to USGS.
USGS catalogues this as quarry blast, not an earthquake.
How big was it?
This earthquake released about 38 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 5.8 390,000× the energy of this one
- Magna, Utah 2020 M 5.7 280,000× the energy of this one
- Around the size people start to feel M 3.0 25× the energy of this one
- This earthquake M 2.1 about 38 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 34.7838, -99.0647. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Kiowa County, OK | 17 km (11 mi) | SSW of here | earthquakes near Kiowa County |
| Jackson County, OK | 38 km (24 mi) | ENE of here | earthquakes near Jackson County |
| Tillman County, OK | 47 km (30 mi) | NNW of here | earthquakes near Tillman County |
| Greer County, OK | 48 km (30 mi) | ESE of here | earthquakes near Greer County |
| Comanche County, OK | 55 km (34 mi) | WNW of here | earthquakes near Comanche County |
| Washita County, OK | 57 km (35 mi) | S of here | earthquakes near Washita County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
6 earthquakes have been recorded within 50 km since this one.
- 1.8 9 km NNE of Friendship, Oklahoma
- 1.5 3 km NNE of Cooperton, Oklahoma
- 1.5 6 km NW of Medicine Park, Oklahoma
- 1.6 4 km N of Cooperton, Oklahoma
- 1.6 6 km NE of Cooperton, Oklahoma
- 1.6 7 km NNE of Cooperton, Oklahoma
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.