M 7.9 in United States on 23 Jan 2018 09:31 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: 7.9M
Depth: 25 Km
Lat/Lon: 56.0464 , -149.0728
Event Date: 23 Jan 2018 09:31 UTC
22 Jan 2018 23:31 Local
Exposed Population: No people within 100km
Source: NEIC us2000cmy3
Inserted at: 23 Jan 2018 10:20 UTC
INFORM Coping capacity of the alert score: 1.1 (United States)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 Tsunami GDACS score
NEIC 0 0.5 0.5
us2000cmy3 Scaled population (vector) 0 Max wave scenario 1.01m  
  C1 shakemap 0 Max wave realtime 0.53m  
  C2 shakemap 0      
  Country Vulnerability 0      
  INFORM_normalised 0      
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
1195180 0.8 23 Jan 2018 09:31 8M, 20km N/A No people affected (in 100km) 0.8m (at 01:32) 00:05 NTWC    
1195183 0.4 23 Jan 2018 09:31 7.6M, 10km N/A No people affected (in 100km) 0.5m (at 01:40) 00:08 GEOFON
1195185 0.8 23 Jan 2018 09:31 8M, 19km N/A No people affected (in 100km) 0.8m (at 01:32) 00:12 PTWC
1195191 1.2 23 Jan 2018 09:31 8.2M, 10km N/A No people affected (in 100km) 1.4m (at 01:16) 00:16 NEIC
1195196 0.9 23 Jan 2018 09:31 7.9M, 10km N/A No people affected (in 100km) 0.9m (at 01:16) 00:43 NEIC
1195199 0.5 23 Jan 2018 09:31 7.9M, 25km 4.92 N/A (in MMI>=VII) 0.5m (at 02:10) 00:48 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 ,of Alaska (population 10) . The alertlevel for this event is GREEN

Intensity Population
no people
no people
no people
no people


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1195199 56.046/-149.073 7.9 25 5.01 23 Jan 2018 10:25 00:53 (new episode)
2 0 1195199 56.046/-149.073 7.9 25 5.01 23 Jan 2018 10:30 00:58 (upd of #1)
3 0 1195199 56.046/-149.073 7.9 25 4.83 23 Jan 2018 18:18 08:46 (upd of #2)
4 0 1195199 56.046/-149.073 7.9 25 4.83 23 Jan 2018 18:45 09:14 (upd of #3)
5 0 1195199 56.046/-149.073 7.9 25 4.92 24 Jan 2018 22:54 1d 13:22 (upd of #4)
6 0 1195199 56.004/-149.166 7.9 14.06 4.84 02 May 2018 14:24 99d 04:52 (upd of #5)

Affected Provinces

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

Affected populated places. Areas of interest

Intensity Name Region Province Country City class Population Distance
Port O'Brien Alaska United States Village - 330 km
Port Wakefield Alaska United States Village - 341 km
Port William Alaska United States Village - 358 km
Ekwok Alaska United States Village - 412 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
Kizhuyak KZH unknown 0 312 km
Seal Bay SYB unknown 0 327 km
Danger Bay DGB unknown 0 330 km
San Juan / Uganik WSJ unknown 0 331 km
Pleasant Harbor PTR unknown 0 331 km
Moser Bay KMY unknown 0 337 km
Amook Bay unknown 0 340 km
Zachar Bay KZB unknown 0 341 km
Karluk Lake KKL 112 0 345 km
Onion Bay ONN unknown 0 346 km
Olga Bay KOY unknown 0 348 km
Larsen Bay 23 0 352 km
Port Williams KPR unknown 0 358 km
Karluk KYK 42 0 378 km

Ports

Intensity Name LOCODE Country Distance
Port Obrien Wake Island 331 km
Port Vita Wake Island 342 km
Larsen Bay Wake Island 353 km
Port William Wake Island 357 km
Uyak Wake Island 358 km
Bear Island Wake Island 358 km
Karluk Wake Island 379 km

Dams

Intensity Reservoir Dam Name River Year Distance
Terror Lake Terror River 1984 311 km

More information

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