Oklahoma earthquakes

M4.8 earthquake 8 km SE of Sparks, Oklahoma

A magnitude 4.8 earthquake struck 8 km SE of Sparks, Oklahoma on Sat, Nov 5, 2011, 2:12 AM CDT (07:12 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M5.7 8 km NW of Prague, Oklahoma. This one was a foreshock.

Prague forecast More in Oklahoma

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 4.8 (mwr), light
Local time: Sat, Nov 5, 2011, 2:12 AM CDT
UTC: 2011-11-05 07:12:45 UTC
Depth: 3.1 km (1.9 mi), shallow
Epicenter: 35.550° N, 96.764° W
Region: Oklahoma
Felt reports: 10,180
Strongest shaking: VI, strong shaking
PAGER alert: Green
Tsunami flag: No
Status: Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated: VI, strong shaking
Peak ground acceleration: 45.5% of gravity
Peak ground velocity: 2.7 cm/s
Map: Automatic

USGS ShakeMap: estimated shaking intensity around the epicenter — Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

10,180 people reported to the USGS what they felt; the strongest reported shaking was VII, very strong shaking.

Estimated impact

The USGS PAGER system estimates deaths and economic losses from the shaking and the population and buildings exposed to it.

Alert level: Green: little or no damage or loss of life expected

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting: Strike-slip
Moment magnitude: 4.9 Mww
Nodal plane 1: Strike 212°, dip 82°, rake 173°
Nodal plane 2: Strike 303°, dip 83°, rake 8°

How well it is located

Reviewed by a seismologist.

Station coverage gap: 17°
Stations used: 322

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.8 and up: 86 in the 60 days after this one and 7 in the 30 days before it.

After

The first 60 of 86.

Before

Earthquakes today Oklahoma earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp000jac0 (also filed as iscgem17505618, atlas20111105071245). Read Tue, Sep 22, 2026, 4:18 AM UTC.