QuakeIndex

Earthquake · reviewed by a seismologist

M 4.1mb

5 km SE of Arnold, Nebraska

· 5.0 km deep · released about 21 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Logan County 30 kmCuster County 36 kmThomas County 61 kmLincoln County 62 kmBlaine County 62 kmDawson County 64 kmLoup County 78 kmMcPherson County 86 kmFrontier County 97 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 4.1 (mb)
Depth
5.0 km below the surface
Felt
47 reports · strongest reported intensity IV
Measured shaking
intensity V (ShakeMap)
USGS impact alert
green
Nearest
Logan County, 30 km NW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2928 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 47 people have reported feeling it to USGS.

How big was it?

This earthquake released about 21 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 7,900× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 350× the energy of this one
  3. Magna, Utah 2020 M 5.7 250× the energy of this one
  4. This earthquake M 4.1 about 21 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 45× more

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 41.3841, -100.1549. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Logan County, NE 30 km (19 mi) SE of here earthquakes near Logan County
Custer County, NE 36 km (22 mi) W of here earthquakes near Custer County
Thomas County, NE 61 km (38 mi) SSE of here earthquakes near Thomas County
Lincoln County, NE 62 km (38 mi) NE of here earthquakes near Lincoln County
Blaine County, NE 62 km (39 mi) SSW of here earthquakes near Blaine County
Dawson County, NE 64 km (40 mi) NNW of here earthquakes near Dawson County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

18 earthquakes have been recorded within 50 km since this one.

  1. 3.0 10 km S of Arnold, Nebraska
  2. 2.1 5 km S of Arnold, Nebraska
  3. 2.6 8 km SE of Arnold, Nebraska
  4. 2.5 13 km WNW of Callaway, Nebraska
  5. 2.6 7 km WSW of Arnold, Nebraska
  6. 2.6 6 km SE of Arnold, Nebraska
  7. 2.7 4 km E of Arnold, Nebraska
  8. 3.6 7 km SE of Arnold, Nebraska
  9. 2.0 4 km SE of Arnold, Nebraska
  10. 2.8 11 km SE of Arnold, Nebraska
  11. 2.4 7 km S of Arnold, Nebraska
  12. 2.4 8 km SSE of Arnold, Nebraska
  13. 3.6 5 km ESE of Arnold, Nebraska
  14. 2.7 8 km SE of Arnold, Nebraska
  15. 3.8 2 km SE of Arnold, Nebraska

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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.