Earthquake · reviewed by a seismologist
M 2.5mb_lg
Earthquake near Salina, KS
USGS: 3 km NNE of Assaria, Kansas
- When
- 4:32 am CST on 4 December 2021 ()
- Where
- 14 km (9 mi) S of Salina, KS · earthquakes near Salina
- Magnitude
- M 2.5 (mb_lg)
- Depth
- 5.0 km below the surface
- Felt
- no reports yet
- Nearest
- Saline County, 10 km NNW
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1693 days ago
A magnitude 2.5 earthquake was recorded 14 km (9 mi) S of Salina, KS, at 4:32 am CST on 4 December 2021 (10:32 UTC). This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
Earthquakes near other towns within 30 km: Lindsborg, Solomon.
How big was it?
This earthquake released about 170 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 89,000× the energy of this one
- Magna, Utah 2020 M 5.7 63,000× the energy of this one
- Around the size people start to feel M 3.0 5.6× the energy of this one
- This earthquake M 2.5 about 170 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.
For this area
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 38.7141, -97.5891. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Saline County, KS | 10 km (6 mi) | NNW | earthquakes near Saline County |
| McPherson County, KS | 36 km (22 mi) | S | earthquakes near McPherson County |
| Dickinson County, KS | 41 km (26 mi) | ENE | earthquakes near Dickinson County |
| Ottawa County, KS | 47 km (29 mi) | N | earthquakes near Ottawa County |
| Ellsworth County, KS | 53 km (33 mi) | W | earthquakes near Ellsworth County |
| Marion County, KS | 58 km (36 mi) | SE | earthquakes near Marion County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
60 earthquakes have been recorded within 50 km since this one.
- 2.7 2 km SW of Assaria, Kansas
- 2.4 3 km ENE of Assaria, Kansas
- 2.7 4 km WSW of Assaria, Kansas
- 2.6 0 km SSW of Assaria, Kansas
- 2.5 3 km NNW of Assaria, Kansas
- 2.4 0 km N of Assaria, Kansas
- 2.5 4 km SSE of Smolan, Kansas
- 2.2 5 km N of Assaria, Kansas
- 2.5 4 km E of Assaria, Kansas
- 2.7 3 km SSE of Solomon, Kansas
- 2.5 4 km W of Bennington, Kansas
- 3.4 6 km NNE of Bennington, Kansas
- 3.1 7 km E of Assaria, Kansas
- 2.6 7 km NNE of Bennington, Kansas
- 3.4 3 km NNW of Bennington, Kansas
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.