M 5.1 in United States on 08 Apr 2023 20:25 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: 5.1M
Depth: 56.2 Km
Lat/Lon: 53.8134 , -165.3562
Event Date: 08 Apr 2023 20:25 UTC
08 Apr 2023 09:25 Local
Exposed Population: 3 thousand in MMI IV
Source: ALASKA EC ak0234ieq2c8
Inserted at: 14 Apr 2023 02:07 UTC
INFORM Coping capacity of the alert score
1.1 (United States)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Rapid Impact)		 GDACS score
ALASKA EC 0 0
ak0234ieq2c8 Scaled population (vector) 0  
  C1 rapid impact 0  
  C2 rapid impact 0  
  Country Vulnerability 0  
  INFORM_normalised 0  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1499618 0 08 Apr 2023 20:25 5M, 60km 3.63 N/A (in MMI>=VII) 00:08 NTWC
1499621 0 08 Apr 2023 20:25 4.9M, 36.1km 3.03 6 thousand (in 100km) 00:13 ALASKA EC
1499623 0 08 Apr 2023 20:25 5.1M, 66.396km 3.6 N/A (in MMI>=VII) 00:16 NEIC
1500442 0 08 Apr 2023 20:25 5.1M, 56.2km 3.75 3 thousand (in 100km) 5d 05:42 ALASKA EC
1500562 0 08 Apr 2023 20:25 5.1M, 65.5km 3.66 N/A (in MMI>=VII) 6d 01:39 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 off shore.

Radius Population
100 km 5500 people
75 km 1200 people
50 km 1100 people
20 km no people
10 km no people
5 km no people
2 km no people

Affected Provinces

Affected populated places

Name Region Province Country City class Population Distance
Akutan Alaska United States Village <1000 people 45 km
Biorka Alaska United States Village - 56 km

see full list

Critical infrastructure

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

Airports

Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Akutan KQA unknown 0 45 km
Lost Harbor Sea Port LHB unknown 0 50 km
Beaver Inlet Sea Port BVD unknown 0 65 km
Unalaska - Emergency Field DUT 7 Civ. Paved Yes 3900 79 km
Cape Sarichef CSH 89 Civ. Unpaved No 3500 90 km
Driftwood Bay DFB unknown 0 100 km

Ports

Name LOCODE Country Distance
Akutan USAKU Wake Island 46 km
Unalaska USUAA Wake Island 77 km
Dutch Harbor USDUT Wake Island 79 km
Cannery Bay Wake Island 92 km
Unimak Wake Island 93 km

More information

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