M 5.5 in Indonesia on 31 Aug 2026 08:03 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: 5.5M
Depth: 10 Km
Lat/Lon: -8.241 , 120.6119
Event Date: 31 Aug 2026 08:03 UTC
31 Aug 2026 16:03 Local
Exposed Population: 9 thousand in MMI VI
Source: NEIC us7000td2z
Inserted at: 31 Aug 2026 08:18 UTC
INFORM Coping capacity of the alert score
4.8 (Indonesia)

GDACS Score

For more info on GDACS score click here.
  Earthquake
(Shakemap)		 GDACS score
NEIC 0 0
us7000td2z Scaled population (raster) 0  
  C1 shakemap -1.73  
  C2 shakemap 0.79  
  Country Vulnerability 0  
  INFORM_normalised 0.96  
Maximum expected impact using different data sources.

Episode Timeline

IDLevelScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1730254 0 31 Aug 2026 08:03 5.5M, 10km 6.27 N/A (in MMI>=VII) 00:15 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

Radius Population
100 km 1.3 million people
75 km 940000 people
50 km 500000 people
20 km 48000 people
10 km 7100 people
5 km <1000 people
2 km no people

Affected Provinces

Critical infrastructure

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

More information

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