M 5.5 in Solomon Is. on 20 Sep 2018 05:47 UTC
EQ parameters

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: 10 Km
Lat/Lon: -9.0038 , 158.3121
Event Date: 20 Sep 2018 05:47 UTC
Exposed Population: About 25000 people within 100km
Source: NEIC us2000hhfi
Inserted at: 20 Sep 2018 06:07 UTC
INFORM Coping capacity of the alert score: 6.6 (Solomon Is.)


For more info on GDACS alert score click here.
GDACS score
NEIC 0 0
us2000hhfi Scaled population (vector) 0  
  C1 shakemap -0.59  
  C2 shakemap 0.53  
  Country Vulnerability 0  
  INFORM_normalised 1.18  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1228973 0 20 Sep 2018 05:47 5.5M, 10km 4.23 30 thousand 00:19 NEIC
The episode that generated the alert; the next major evaluations beyond 12 hours will not trigger additional alerts.
* 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 Solomon Islands , of Solomon Is. (population 366,000) . The nearest places are Saira, Batuna, Nineveh, Halisi, and Seghe.

Radius Population
100 km 25000 people
75 km 14000 people
50 km 6200 people
20 km no people
10 km no people
5 km no people
2 km no people

Affected Provinces

Region Province Country Population
Solomon Is. Solomon Islands 360000 people
Northern Solomons Papua New Guinea 130000 people

Affected populated places

Name Region Province Country City class Population Distance
Saira Solomon Islands Village5 - 47 km
Batuna Solomon Islands Village6 - 55 km
Nineveh Solomon Islands Village5 - 56 km
Halisi Solomon Islands Village5 - 58 km
Seghe Solomon Islands Village5 - 67 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
Sege EGM 3 0 68 km
Viru QVU unknown 0 89 km


Name LOCODE Country Distance
Viru Harbour SBVIU Soloman Islands 85 km
Pipisala Bay Soloman Islands 90 km
Yandina SBXYA Soloman Islands 99 km

More information

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