Earthquake · reviewed by a seismologist
M 2.9mb_lg
5 km SW of Kirwin, Kansas
- When
- Magnitude
- M 2.9 (mb_lg)
- Depth
- 5.0 km below the surface
- Felt
- 5 reports · strongest reported intensity III
- Nearest
- Phillips County, 22 km NW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 214 days ago
This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 5 people have reported feeling it to USGS.
How big was it?
This earthquake released about 680 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 22,000× the energy of this one
- Magna, Utah 2020 M 5.7 16,000× the energy of this one
- Around the size people start to feel M 3.0 1.4× the energy of this one
- This earthquake M 2.9 about 680 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 39.6372, -99.1741. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction | |
|---|---|---|---|
| Phillips County, KS | 22 km (14 mi) | SE of here | earthquakes near Phillips County |
| Rooks County, KS | 35 km (22 mi) | NNE of here | earthquakes near Rooks County |
| Smith County, KS | 37 km (23 mi) | WSW of here | earthquakes near Smith County |
| Osborne County, KS | 47 km (29 mi) | NW of here | earthquakes near Osborne County |
| Harlan County, NE | 63 km (39 mi) | SSE of here | earthquakes near Harlan County |
| Franklin County, NE | 63 km (39 mi) | SSW of here | earthquakes near Franklin 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.