M 5.7 in United States on 21 Nov 2018 18:21 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: 5.7M
Depth: 145.5 Km
Lat/Lon: 59.9732 , -153.3083
Event Date: 21 Nov 2018 18:21 UTC
21 Nov 2018 09:21 Local
Exposed Population: About 4000 people within 100km
Source: ALASKA EC ak20386247
Inserted at: 21 Nov 2018 18:34 UTC
INFORM Coping capacity of the alert score: 2.2 (United States)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 GDACS score
ALASKA EC 0 0
ak20386247 Scaled population (vector) 0  
  C1 shakemap -0.59  
  C2 shakemap 0.53  
  Country Vulnerability 0  
  INFORM_normalised 0.65  
Maximum expected impact using different data sources.

ShakeMap is a product of the USGS Earthquake Hazards Program in conjunction with the regional seismic networks. ShakeMaps provide near-real-time maps of ground motion and shaking intensity following significant earthquakes.


Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1237865 0 21 Nov 2018 18:21 5.4M, 151.1km N/A 4 thousand (in 100km) 00:04 ALASKA EC
1237866 0 21 Nov 2018 18:21 5.7M, 131.7km N/A 4 thousand (in 100km) 00:06 ALASKA EC
1237869 0 21 Nov 2018 18:21 5.8M, 117.9km N/A 4 thousand (in 100km) 00:11 ALASKA EC
1237870 0 21 Nov 2018 18:21 5.7M, 145.5km 3.88 N/A (in MMI>=VII) 00:13 ALASKA EC
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 ,of Alaska (population 6,968) . The alertlevel for this event is GREEN

Intensity Population
no people
no people


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1237870 60.036/-153.292 5.7 131.7 3.89 21 Nov 2018 18:37 00:15 (new episode)
2 0 1237870 60.036/-153.292 5.7 131.7 3.89 21 Nov 2018 18:40 00:18 (upd of #1)

Affected Provinces

Intensity Region Province Country Population
Alaska United States 7000 people
Alaska United States <1000 people

Affected populated places. Areas of interest

Intensity Name Region Province Country City class Population Distance
Anchor Point Alaska United States Village 1800 people 85 km
Kustatan Alaska United States Village - 119 km
Nikiski Alaska United States Village 4300 people 135 km
Nkishka No 2 Alaska United States Village - 137 km

see full list


Critical infrastructure

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

Airports

Intensity Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Camp Point 2 0 21 km
Anchor River Airpark 37 0 84 km
Drift River DRF 9 0 93 km
Homer HOM 24 Civ. Paved Yes 7400 109 km
Carty's Airstrip 46 0 138 km
Offshore Ststems-Kenai 46 0 140 km
Big Mountain BMX 202 0 129 km
Sparrevohn AFS SVW 483 Mil. Unpaved Yes 4100 177 km

Ports

Intensity Name LOCODE Country Distance
Snug Harbor Wake Island 43 km
Ninilchik Wake Island 91 km
Homer USHOI Wake Island 114 km
West Foreland USWFO Wake Island 120 km
Ola Wake Island 122 km

More information

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