QuakeIndex

Earthquake · reviewed by a seismologist

M 3.3mb_lg

Earthquake near Ponca City, OK

No earthquake was likely felt in Ponca City in the 24 hours to 10:47 am CST (16:47 UTC). The last one was M 3.4, 149 km (93 mi) SW, at 5:53 am CST on 7 November 2026, estimated intensity II (weak) in town; 23 felt reports to USGS. Every earthquake near Ponca City

This page: a magnitude 3.3 earthquake was recorded 32 km (20 mi) southwest of Ponca City, OK, at 1:07 am CDT on 27 June 2017 (06:07 UTC), 5.0 km deep. 13 people have reported feeling it to USGS.

USGS: 9 km W of Red Rock, Oklahoma

42 km (26 mi) NNW of Stillwater, OK · 114 km (71 mi) N of Oklahoma City, OK

1:07 am CDT, Jun 27, 2017 · · 5.0 km deep · released about 1.3 tons of TNT

Every earthquake near Ponca City Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Noble County 11 kmKay County 40 kmGarfield County 46 kmPayne County 52 kmPawnee County 56 kmGrant County 57 kmLogan County 64 kmOsage County 80 kmKingfisher County 82 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
1:07 am CDT on 27 June 2017 ()
Where
32 km (20 mi) southwest of Ponca City, OK · earthquakes near Ponca City
Oklahoma today
every earthquake in Oklahoma in the last 24 hours
Magnitude
M 3.3 (mb_lg)
Depth
5.0 km below the surface
Felt
13 reports · strongest reported intensity III
Nearest
Noble County, 11 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3333 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 234 km (145 mi) from the epicentre. In Ponca City, 32 km away, the estimate is intensity III (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

Likely felt in: Perry 20 km, intensity III · Ponca City 32 km, intensity III · Blackwell 37 km, intensity III · Stillwater 45 km, intensity III · Pawnee 46 km, intensity III. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 1.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 130,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 5,600× the energy of this one
  3. Magna, Utah 2020 M 5.7 4,000× the energy of this one
  4. This earthquake M 3.3 about 1.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 2.8× 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.

For this area

The largest earthquake within 50 km since 2016 was M 5.8 on 2016-09-03 — about 5,600 times the energy of this one.

Before 2016, the USGS record since 1900 lists no earthquake of M5 or more within 50 km.

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 36.4723, -97.2848. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Noble County, OK 11 km (7 mi) SSE earthquakes near Noble County
Kay County, OK 40 km (25 mi) NNE earthquakes near Kay County
Garfield County, OK 46 km (29 mi) WSW earthquakes near Garfield County
Payne County, OK 52 km (32 mi) SSE earthquakes near Payne County
Pawnee County, OK 56 km (34 mi) ESE earthquakes near Pawnee County
Grant County, OK 57 km (35 mi) NW earthquakes near Grant County

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

Aftershocks so far

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

  1. 2.5 13 km WSW of Ralston, Oklahoma
  2. 3.8 10 km SSE of Red Rock, Oklahoma
  3. 2.6 2 km NNW of Fairmont, Oklahoma
  4. 2.7 5 km WNW of Lucien, Oklahoma
  5. 2.5 5 km WNW of Lucien, Oklahoma
  6. 3.4 5 km WNW of Lucien, Oklahoma
  7. 3.3 4 km WNW of Lucien, Oklahoma
  8. 2.7 2 km SSE of Marshall, Oklahoma
  9. 2.8 9 km ESE of Jefferson, Oklahoma
  10. 2.8 4 km WNW of Lucien, Oklahoma
  11. 3.0 9 km NNW of Hunter, Oklahoma
  12. 2.7 5 km WNW of Lucien, Oklahoma
  13. 2.5 4 km WNW of Lucien, Oklahoma
  14. 3.0 4 km WNW of Lucien, Oklahoma
  15. 4.3 9 km ESE of Jefferson, 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.