M 5.8 in Rat Islands, Aleutian Islands on 09 May 2026 04:42 UTC

Hazard models

Rapid Impact
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: 5.8M
Depth: 26.5 Km
Lat/Lon: 51.0818 , 179.349
Event Date: 09 May 2026 04:42 UTC
09 May 2026 16:42 Local
Exposed Population:
Source: NEIC us6000swf4
Inserted at: 09 May 2026 04:57 UTC
INFORM Coping capacity of the alert score: 1.1 ()

GDACS Score

For more info on GDACS score click here.
  Earthquake
(Rapid Impact)		 GDACS score
NEIC 0 0
us6000swf4 Scaled population (raster) 0  
  C1 rapid impact 0  
  C2 rapid impact 0  
  Country Vulnerability 0  
  INFORM_normalised 0  
Maximum expected impact using different data sources.

The green area correspond to areas affected by strong shaking (MMI VI or higher) according to the simulation.


Episode Timeline

IDLevelScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1704853 0 09 May 2026 04:42 5.3M, 50km 3.05 N/A (in MMI>=VII) N/A 00:09 NTWC
1704855 0 09 May 2026 04:42 6.1M, 16.3km 3.41 N/A (in MMI>=VII) N/A 00:11 ALASKA EC
1704856 0 09 May 2026 04:42 5.8M, 26.5km 3.2 N/A (in MMI>=VII) N/A 00:14 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.

Rapid Impact

The results presented below are calculated with the ShakeMap open source software (USGS) using only earthquake hypocenter information to provide a rapid estimation of the ground motion and shaking intensity without taking into account any instrumental observations or earthquake source scaling laws.

Exposed population

The earthquake happened in United States ,of Alaska (population 572,432) . The alertlevel for this event is GREEN

Intensity Population
no people

Affected Provinces

Intensity Region Province Country Population
Alaska United States no people
Alaska United States no people

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
Amchitka Island AHT 69 0 34 km

Ports

Intensity Name LOCODE Country Distance
Constantine Harbour Wake Island 35 km

More information

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