M 6.6 in United States on 15 Aug 2018 21:56 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: 6.6M
Depth: 20 Km
Lat/Lon: 51.435 , -178.0543
Event Date: 15 Aug 2018 21:56 UTC
15 Aug 2018 12:56 Local
Exposed Population: No people within 100km
Source: NEIC us1000ga0z
Inserted at: 15 Aug 2018 23:54 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
us1000ga0z 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
1224211 0 15 Aug 2018 21:56 6.5M, 35km N/A No people affected (in 100km) 0m (at 00:00) 00:05 NTWC    
1224213 0 15 Aug 2018 21:56 6.5M, 10km N/A No people affected (in 100km) 0m (at 00:00) 00:08 GEOFON
1224214 0 15 Aug 2018 21:56 6.5M, 35km N/A No people affected (in 100km) 0m (at 00:00) 00:10 PTWC
1224217 0 15 Aug 2018 21:56 6.6M, 31.59km 5.97 N/A (in MMI>=VII) 0m (at 00:00) 00:18 NEIC
1224231 0 15 Aug 2018 21:56 6.6M, 20km 6.24 N/A (in MMI>=VII) 0m (at 00:00) 01:57 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 1224217 51.509/-178.077 6.6 31.59 5.97 15 Aug 2018 22:16 00:19 (new episode)
2 0 1224231 51.509/-178.077 6.6 31.59 5.97 15 Aug 2018 23:54 01:57 (new episode)
3 0 1224231 51.435/-178.054 6.6 20 6.24 15 Aug 2018 23:56 01:59 (upd of #2)
4 0 1224231 51.435/-178.054 6.6 20 6.24 16 Aug 2018 00:00 02:03 (upd of #3)

Affected Provinces

Intensity Region Province Country Population
Alaska United States no people
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 108 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 109 km
Amchitka Island AHT 69 0 187 km
Atka AKB 10 0 279 km

Ports

Intensity Name LOCODE Country Distance
Tanaga Island Wake Island 54 km
Adak Wake Island 109 km
Constantine Harbour Wake Island 185 km
Semisopochroi Wake Island 169 km
Amchitka Island Wake Island 205 km
Palisades Point Wake Island 283 km

More information

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