QuakeIndex

Earthquake · reviewed by a seismologist

M 3.8mwr

8 km WSW of Superior, Nebraska

· 3.0 km deep · released about 7.6 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Nuckolls County 23 kmJewell County 24 kmWebster County 36 kmRepublic County 47 kmThayer County 52 kmSmith County 58 kmClay County 60 kmAdams County 66 kmMitchell County 66 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 3.8 (mwr)
Depth
3.0 km below the surface
Felt
149 reports · strongest reported intensity V
Measured shaking
intensity V (ShakeMap)
Nearest
Nuckolls County, 23 km NNE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1461 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 149 people have reported feeling it to USGS.

How big was it?

This earthquake released about 7.6 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.8 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 22,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 1,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 710× the energy of this one
  4. This earthquake M 3.8 about 7.6 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 16× 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 39.9889, -98.1625. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Nuckolls County, NE 23 km (14 mi) SSW of here earthquakes near Nuckolls County
Jewell County, KS 24 km (15 mi) NNE of here earthquakes near Jewell County
Webster County, NE 36 km (22 mi) SE of here earthquakes near Webster County
Republic County, KS 47 km (29 mi) WNW of here earthquakes near Republic County
Thayer County, NE 52 km (33 mi) WSW of here earthquakes near Thayer County
Smith County, KS 58 km (36 mi) ENE of here earthquakes near Smith County

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

Aftershocks so far

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

  1. 2.9 7 km E of Cowles, Nebraska
  2. 2.8 4 km ESE of Cowles, Nebraska
  3. 2.5 6 km ESE of Cowles, Nebraska
  4. 2.4 4 km ENE of Cowles, Nebraska
  5. 2.6 8 km N of Guide Rock, Nebraska
  6. 2.6 9 km E of Cowles, Nebraska
  7. 2.3 3 km S of Cowles, Nebraska
  8. 4.1 4 km E of Cowles, Nebraska
  9. 2.5 4 km NNE of Jewell, Kansas
  10. 2.6 5 km WSW of Formoso, Kansas
  11. 2.8 7 km ENE of Cowles, Nebraska
  12. 2.6 7 km N of Jewell, Kansas
  13. 2.5 7 km WSW of Formoso, Kansas
  14. 2.5 7 km WSW of Formoso, Kansas
  15. 2.5 11 km E of Cowles, 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.