M 4.6 in United States on 12 Feb 2011 02:36 UTC

Hazard models

EQ parameters
Shakemap
Tsunami

Event summary

This earthquake is expected to have a low humanitarian impact based on the magnitude and the affected population and their vulnerability.

Earthquake Magnitude: 4.6M
Depth: Km
Lat/Lon: 44.2703 , -110.973
Event Date: 12 Feb 2011 02:36 UTC
11 Feb 2011 19:36 Local
Exposed Population:
about 88000 people within 100km
Source: NEIC uu00005729
Inserted at: 12 Feb 2011 02:43 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0.5 0.5
uu00005729 Scaled population (vector) n.a  
  C1 earthquake n.a  
  C2 earthquake n.a  
  Country Vulnerability n.a  
  INFORM_normalised n.a  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
103961 0.5 12 Feb 2011 02:36 4.6M, 15.5km N/A 90 thousand (in 100km) 00:06 NEIC
The episode that generated the alert; the next major evaluations beyond 12 hours will not trigger additional alerts.
The episode that has the last updated information.
* The max MMI detected for sources having shakemaps;
** The population detected in MMI>=7 for episode with shakemap or in a 100km radius;
*** The tsunami max height.

Exposed population

The earthquake happened in United States , State of Wyoming (population 472,049) . The nearest places are Three River Junction, Old Faithful, Gerrit, Eccles, Pineview, Warm River, Big Springs, West Thumb, Trude, Box Canyon, and Moose.

Radius Population
100 km 110000 people
75 km 27000 people
50 km 7100 people
20 km <1000 people
10 km no people
5 km no people
2 km no people

Affected Provinces

Region Province Country Population
Wyoming United States 470000 people
Idaho United States 1 million people

Affected populated places

Name Region Province Country City class Population Distance
Three River Junction Wyoming United States Village - 7 km
Old Faithful Wyoming United States Village - 24 km
Gerrit Idaho United States Village - 25 km
Eccles Idaho United States Village - 27 km
Pineview Idaho United States Village - 27 km
Warm River Idaho United States Village <1000 people 33 km
Big Springs Idaho United States Village - 35 km
West Thumb Wyoming United States Village - 36 km
Trude Idaho United States Village - 36 km
Box Canyon Idaho United States Village - 36 km
Squirrel Idaho United States Village - 38 km
Lamont Idaho United States Village - 39 km
Macks Inn Idaho United States Village - 39 km
Judkins Idaho United States Village - 41 km
Drummond Idaho United States Village <1000 people 41 km
France Idaho United States Village - 41 km
Marysville Idaho United States Village - 42 km
Island Park Idaho United States Village <1000 people 43 km
Ashton Idaho United States Village 1100 people 44 km
Riverside Montana United States Village - 44 km
Corette Montana United States Village - 44 km
West Yellowstone Montana United States Village 1200 people 45 km
Farnum Idaho United States Village - 46 km
Felt Idaho United States Village - 47 km
Colter Bay Village Wyoming United States Village - 49 km
Ora Idaho United States Village - 49 km
Sarilda Idaho United States Village - 51 km
Tetonia Idaho United States Village <1000 people 53 km
Clawson Idaho United States Village - 54 km
Clementsville Idaho United States Village - 54 km
Lake Idaho United States Village - 55 km
Lake Wyoming United States Village - 56 km
Lonesome Hurst Summer Home Area Montana United States Village - 56 km
Dwight Idaho United States Village - 56 km
Chester Idaho United States Village - 56 km
Horse Butte Acres Trailer Court Montana United States Village - 57 km
Staley Springs Idaho United States Village - 57 km
Jenny Lake Lodge Wyoming United States Village - 58 km
Alta Wyoming United States Village <1000 people 58 km
Driggs Idaho United States Village 1100 people 60 km
Moran Wyoming United States Village - 61 km
Twin Groves Idaho United States Village - 62 km
Jenny Lake Wyoming United States Village - 62 km
Grayling Montana United States Village - 62 km
Twin Forks Idaho United States Village - 62 km
Canyon Wyoming United States Village - 62 km
Elk Wyoming United States Village - 64 km
Two Forks Idaho United States Village - 64 km
Darby Idaho United States Village - 64 km
Bedstead Corner Idaho United States Village - 65 km
Newdale Idaho United States Village <1000 people 66 km
Saint Anthony Idaho United States Village 3300 people 66 km
Bates Idaho United States Village - 67 km
Beaver Creek Wyoming United States Village - 68 km
Wilford Idaho United States Village - 69 km
Pyke Idaho United States Village - 69 km
Moose Wyoming United States Village - 70 km

see full list

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

Airports

Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Yellowstone WYS 2025 Civ. Paved Yes 8300 48 km
Henry's Lake 2010 0 50 km
Bowman Field 1554 0 56 km
Teton Peaks Driggs Municipal 1890 0 60 km
Stanford Field 1514 0 67 km
Jackson Hole JAC 1964 Civ. Paved Yes 6200 76 km
Lakeview 2021 0 76 km
Rexburg Madison County 1481 Civ. Paved Yes 4200 82 km
Metzel Creek 2039 0 87 km
Gardiner 1611 0 88 km
Jackson 1895 0 89 km
Nine Quarter Circle Ranch 2126 0 92 km
Melody Ranch 1852 0 97 km
Huskey 1585 0 98 km

Dams

Reservoir Dam Name River Year Distance
Grassy Lake Grassy Lake Grassy Creek 1938 20 km
Island Park Island Park Henrys Fork 1937 38 km
Ashton Henrys Fork 1913 47 km
Jackson Lake Jackson Lake Snake River 1911 55 km
Hebgen Dam Madison River 1915 72 km
Earthquake Lake Madison River 1959 72 km
Ririe Ririe Willow Creek 1976 98 km

More information

For a full list of available products related to this event, please refer to the GDACS Resources page.