Earthquake · reviewed by a seismologist
M 1.8ml
8 km N of Knowles, Oklahoma
- When
- Magnitude
- M 1.8 (ml)
- Depth
- 18 km below the surface
- Felt
- no reports yet
- Nearest
- Beaver County, 35 km SW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1896 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 14 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 1,100,000× the energy of this one
- Magna, Utah 2020 M 5.7 760,000× the energy of this one
- Around the size people start to feel M 3.0 68× the energy of this one
- This earthquake M 1.8 about 14 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 36.9520, -100.1773. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Beaver County, OK | 35 km (22 mi) | NE of here | earthquakes near Beaver County |
| Meade County, KS | 36 km (23 mi) | SSE of here | earthquakes near Meade County |
| Clark County, KS | 45 km (28 mi) | SW of here | earthquakes near Clark County |
| Harper County, OK | 49 km (30 mi) | WNW of here | earthquakes near Harper County |
| Seward County, KS | 65 km (41 mi) | ESE of here | earthquakes near Seward County |
| Lipscomb County, TX | 75 km (47 mi) | N of here | earthquakes near Lipscomb County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
7 earthquakes have been recorded within 50 km since this one.
- 2.0 12 km WNW of Knowles, Oklahoma
- 2.4 12 km NW of Knowles, Oklahoma
- 2.7 13 km WNW of Knowles, Oklahoma
- 1.5 11 km WNW of Knowles, Oklahoma
- 2.3 13 km WNW of Knowles, Oklahoma
- 1.9 9 km SW of Englewood, Kansas
- 1.8 9 km W of Buffalo, 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.