QuakeIndex

Earthquake · reviewed by a seismologist

M 2.8md

0.4 km ESE of Maynard, Arkansas

· 11 km deep · released about 490 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Randolph County 15 kmRipley County 28 kmClay County 42 kmGreene County 42 kmLawrence County 45 kmButler County 55 kmOregon County 56 kmSharp County 59 kmCarter County 61 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 2.8 (md)
Depth
11 km below the surface
Felt
6 reports · strongest reported intensity III
Nearest
Randolph County, 15 km WSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1394 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 6 people have reported feeling it to USGS.

How big was it?

This earthquake released about 490 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 31,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 22,000× the energy of this one
  3. Around the size people start to feel M 3.0 1.9× the energy of this one
  4. This earthquake M 2.8 about 490 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 36.4028, -90.8837. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Randolph County, AR 15 km (9 mi) ENE of here earthquakes near Randolph County
Ripley County, MO 28 km (17 mi) S of here earthquakes near Ripley County
Clay County, AR 42 km (26 mi) W of here earthquakes near Clay County
Greene County, AR 42 km (26 mi) NW of here earthquakes near Greene County
Lawrence County, AR 45 km (28 mi) NNE of here earthquakes near Lawrence County
Butler County, MO 55 km (34 mi) SW of here earthquakes near Butler County

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

Aftershocks so far

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

  1. 1.8 9 km W of Maynard, Arkansas
  2. 2.2 4 km SSE of Maynard, Arkansas
  3. 2.1 6 km ENE of Smithville, Arkansas
  4. 2.9 12 km WSW of Grandin, Missouri
  5. 2.2 13 km W of Maynard, Arkansas
  6. 2.5 4 km E of Doniphan, Missouri
  7. 2.7 5 km E of Doniphan, Missouri
  8. 2.3 5 km SE of Imboden, Arkansas
  9. 2.0 6 km N of Black Rock, Arkansas
  10. 2.1 8 km NE of Smithville, Arkansas
  11. 2.0 4 km NNW of Minturn, Arkansas
  12. 1.8 2 km SW of Ravenden, Arkansas
  13. 2.0 5 km N of Black Rock, Arkansas
  14. 1.7 3 km N of Black Rock, Arkansas
  15. 2.4 7 km SW of Ravenden, Arkansas

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.