Home » Special Events » Magnitudes 4.7 & 5.6 earthquakes in Oklahoma
last updated: 11/07/11 08:36.23 (PST)
On Saturday November 5 2011 at 12:12 AM (PDT) and Saturday November 5 2011 at 8:53 PM (PDT) the USArray seismic network recorded two earthquakes (preliminary magnitudes Mw 4.7 foreshock & Mw 5.6 mainshock) located in Oklahoma.
Initial source parameters for these tremors are indicated below. The epicentral distance (i.e. distance separating the epicenter and the closest station in the recording network, V35A) for the Mw 5.6 main shock and USArray is 26 km (0.24 degrees).
If you felt the quake, the USGS would like to know. Please add your comments to the USGS page "Did you feel it?".
Summary
| Foreshock Solution Parameters | |
|---|---|
| Local Date: | Saturday November 5, 2011 |
| Local Time: | 12:12 AM PDT |
| Universal Time: | 11/05/11 (309) 07:12.45 UTC |
| Magnitude: | 4.7 Mw |
| Latitude: | 35.5530 |
| Longitude: | -96.7480 |
| Depth: | 4 km |
| Author: | QED_weekly |
| Authoritative: | yes |
| Mainshock Solution Parameters | |
|---|---|
| Local Date: | Saturday November 5, 2011 |
| Local Time: | 8:53 PM PDT |
| Universal Time: | 11/06/11 (310) 03:53.10 UTC |
| Magnitude: | 5.6 Mw |
| Latitude: | 35.5370 |
| Longitude: | -96.7470 |
| Depth: | 5 km |
| Author: | QED_weekly |
| Authoritative: | yes |
Proximity to Population Centers (Mw 5.6 Event)
- 34 km (21 miles) NNE of Shawnee, Oklahoma
- 63 km (39 miles) SSE of Stillwater, Oklahoma
- 68 km (42 miles) ESE of Guthrie, Oklahoma
- 71 km (44 miles) ENE of Oklahoma City, Oklahoma
Maps
Mercator projection regional view
The red star denotes the earthquake epicenter. Triangle symbols are active stations at the time of the earthquake in the USArray (excluding ANSS backbone stations and GSN stations, which are represented by a diamond symbol) and colored by network. Blue lines are major rivers. Thin black lines are state boundaries and thick black lines are national boundaries.
| Transportable Array (TA) | |
| UC San Diego (AZ) | |
| CalTech (CI) | |
| Uni. Utah (UU) | |
| ANSS backbone stations (US) | |
| Global Seismograph Network (IU) |
Regional satellite view
The red markers denote the earthquake epicenters.
Detailed terrain view
The red markers denote the earthquake epicenters.
Waveforms
You may view plots showing the Mw 5.6 event as recorded by USArray instruments:
- 3 components recorded by V35A, the closest USArray station to the main Mw 5.6 event
- Large 3 components recorded by V35A, the closest USArray station to the main Mw 5.6 event
- Vertical components from every eighth USArray station that recorded the Mw 5.6 event across the whole network
3 components recorded by V35A, the closest USArray station to the main Mw 5.6 event:
Every arrival station waveforms
View waveforms from any station* that recorded arrivals for the Mw 5.6 event by entering the station code below (e.g. 109C) and clicking the 'View waveforms' button:
News links
- USGS page for the Mw 4.7 event
- USGS page for the Mw 5.6 event
- New York Times: "For a Weekend, Oklahoma is Earthquake Country"
- CNN: "Oklahoma's largest quake in decades buckles highway; rattles residents"
Search the internet
To search the internet for more information about this event, click on the button below:
Current seismic activity measured by USArray
Click the link below to observe an interactive map of earthquakes recorded by the USArray deployment:
Further information
Learn more about the Array Network Facility (ANF) component of USArray, the USArray experiment, the EarthScope project, and the Incorporated Research Institutions for Seismology (IRIS).
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