M 5.5 in Solomon Is. on 27 Feb 2023 09:50 UTC

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: 5.5M
Depth: 83.403 Km
Lat/Lon: -11.2688 , 166.2826
Event Date: 27 Feb 2023 09:50 UTC
27 Feb 2023 20:50 Local
Exposed Population: 20 thousand in MMI IV
Source: NEIC us6000jrwn
Inserted at: 27 Feb 2023 10:11 UTC
INFORM Coping capacity of the alert score
1.1 (Solomon Is.)


For more info on GDACS alert score click here.
GDACS score
NEIC 0 0
us6000jrwn Scaled population (raster) 0  
  C1 shakemap 0  
  C2 shakemap 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
1492469 0 27 Feb 2023 09:50 5.5M, 83.403km 4.14 N/A (in MMI>=VII) 00:21 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 off shore.

Radius Population
100 km 14000 people
75 km 6500 people
50 km 1200 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
Nimbau Solomon Islands Village - 18 km
Avita Solomon Islands Village - 20 km
Asimboa Solomon Islands Village - 20 km
Apakhö Solomon Islands Village - 21 km
Tanabili Solomon Islands Village - 27 km
Malombo Solomon Islands Village - 27 km
Nama Solomon Islands Village - 67 km
Vana Solomon Islands Village - 68 km
Nonea Solomon Islands Village - 68 km
Masoko Solomon Islands Village - 68 km
Neembuna Solomon Islands Village - 69 km
Lale Solomon Islands Village - 69 km
Noli Solomon Islands Village - 69 km

see full list

Critical infrastructure

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


Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Santa Cruz SCZ unknown 0 73 km


Name LOCODE Country Distance
Peu Soloman Islands 76 km
Graciosa Bay Soloman Islands 76 km

More information

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