QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5ml

2 km ESE of Johnson, Oklahoma

· 17 km deep · released about 2.7 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Pottawatomie County 24 kmSeminole County 33 kmLincoln County 35 kmOkfuskee County 45 kmCleveland County 51 kmOklahoma County 57 kmHughes County 64 kmCreek County 69 kmMcClain County 71 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 3.5 (ml)
Depth
17 km below the surface
Felt
141 reports · strongest reported intensity IV
Nearest
Pottawatomie County, 24 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 64 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 141 people have reported feeling it to USGS.

How big was it?

This earthquake released about 2.7 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 63,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,800× the energy of this one
  3. Magna, Utah 2020 M 5.7 2,000× the energy of this one
  4. This earthquake M 3.5 about 2.7 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 5.6× 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 35.3972, -96.8158. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Pottawatomie County, OK 24 km (15 mi) NNE of here earthquakes near Pottawatomie County
Seminole County, OK 33 km (20 mi) NW of here earthquakes near Seminole County
Lincoln County, OK 35 km (21 mi) S of here earthquakes near Lincoln County
Okfuskee County, OK 45 km (28 mi) W of here earthquakes near Okfuskee County
Cleveland County, OK 51 km (31 mi) ENE of here earthquakes near Cleveland County
Oklahoma County, OK 57 km (35 mi) ESE of here earthquakes near Oklahoma County

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

Aftershocks so far

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

  1. 0.8 2 km SE of Carney, Oklahoma
  2. 2.2 9 km NW of Prague, Oklahoma
  3. 2.9 5 km N of Stroud, Oklahoma
  4. 2.0 8 km NW of Prague, Oklahoma
  5. 1.6 9 km SSE of Sparks, Oklahoma
  6. 2.5 8 km NW of Prague, Oklahoma
  7. 1.5 8 km SE of Sparks, Oklahoma
  8. 2.7 5 km N of Stroud, Oklahoma
  9. 1.6 11 km SE of Bowlegs, Oklahoma

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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.1 on 2024-02-03 — it released about 220 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

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