QuakeIndex

Earthquake · reviewed by a seismologist

M 1.8ml

3 km NE of Blanchard, Oklahoma

· 7.0 km deep · released about 14 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N McClain County 23 kmCleveland County 28 kmGrady County 28 kmOklahoma County 48 kmCanadian County 53 kmGarvin County 58 kmPottawatomie County 61 kmCaddo County 69 kmStephens County 78 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 1.8 (ml)
Depth
7.0 km below the surface
Felt
6 reports · strongest reported intensity III
Nearest
McClain County, 23 km SE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2053 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 6 people have reported feeling it to USGS.

How big was it?

This earthquake released about 14 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,100,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 760,000× the energy of this one
  3. Around the size people start to feel M 3.0 68× the energy of this one
  4. This earthquake M 1.8 about 14 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 35.1607, -97.6262. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
McClain County, OK 23 km (14 mi) NW of here earthquakes near McClain County
Cleveland County, OK 28 km (17 mi) W of here earthquakes near Cleveland County
Grady County, OK 28 km (18 mi) ENE of here earthquakes near Grady County
Oklahoma County, OK 48 km (30 mi) SSW of here earthquakes near Oklahoma County
Canadian County, OK 53 km (33 mi) SE of here earthquakes near Canadian County
Garvin County, OK 58 km (36 mi) NNW of here earthquakes near Garvin County

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

Aftershocks so far

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

  1. 2.7 3 km SSE of Union City, Oklahoma
  2. 2.2 3 km N of Minco, Oklahoma
  3. 1.6 3 km N of Minco, Oklahoma
  4. 1.9 4 km NNE of Minco, Oklahoma
  5. 2.5 4 km N of Minco, Oklahoma
  6. 1.6 4 km NNE of Minco, Oklahoma
  7. 1.6 4 km SSE of Union City, Oklahoma
  8. 1.8 4 km SSE of Union City, Oklahoma
  9. 1.5 4 km SSE of Union City, Oklahoma
  10. 2.5 4 km NNE of Minco, Oklahoma
  11. 2.4 3 km NNE of Minco, Oklahoma
  12. 1.5 4 km SSE of Union City, Oklahoma
  13. 1.8 8 km NE of Alex, Oklahoma
  14. 2.2 4 km SSE of Union City, Oklahoma
  15. 1.8 4 km SSE of Union City, 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.

On USGS

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