M 6.3 in United States on 23 Aug 2018 03:35 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: 6.3M
Depth: 43.91 Km
Lat/Lon: 51.5106 , -177.881
Event Date: 23 Aug 2018 03:35 UTC
22 Aug 2018 18:35 Local
Exposed Population: About 200 people within 100km
Source: NEIC us1000gfvg
Inserted at: 23 Aug 2018 03:48 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)		 Tsunami GDACS score
NEIC 0 0 0
us1000gfvg Scaled population (vector) 0 Max wave alert 0m  
  C1 shakemap -0.59 Max wave realtime 0m  
  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
1225470 0 23 Aug 2018 03:35 6.1M, 56km N/A No people affected (in 100km) 00:07 NTWC    
1225473 0 23 Aug 2018 03:35 6.3M, 43.91km 5.84 N/A (in MMI>=VII) 0m (at 00:00) 00:13 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. 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 1225473 51.511/-177.881 6.3 43.91 5.15 23 Aug 2018 03:49 00:14 (new episode)
2 0 1225473 51.511/-177.881 6.3 43.91 5.84 23 Aug 2018 05:37 02:02 (upd of #1)

Affected Provinces

Intensity Region Province Country Population
Alaska United States no people
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
Adak Station Alaska United States Village 9300 people 93 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
Adak Naf ADK 5 Mil. Paved Yes 7700 95 km
Amchitka Island AHT 69 0 199 km
Atka AKB 10 0 265 km

Ports

Intensity Name LOCODE Country Distance
Tanaga Island Wake Island 47 km
Adak Wake Island 94 km
Semisopochroi Wake Island 177 km
Constantine Harbour Wake Island 197 km
Amchitka Island Wake Island 216 km
Palisades Point Wake Island 268 km

More information

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