M 6.6 in Indonesia from 26 Jul 2021 12:09 UTC to 12:09

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: 6.6M
Depth: 30 Km
Event Date: 26 Jul 2021 12:09 UTC
26 Jul 2021 20:09 Local
Exposed Population: 380000 people within 100km
Source: NTWC at00qwuprc
Inserted at: 26 Jul 2021 12:29 UTC
INFORM Coping capacity of the alert score:
4.8 (Indonesia)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake Tsunami GDACS score
NTWC 0.6 0 0.6
at00qwuprc Scaled population (vector) 5.56 Max wave alert 0.07m  
  C1 earthquake 1.54 Max wave realtime 0.07m  
  C2 earthquake -0.64      
  Country Vulnerability 0.09      
  INFORM_normalised 0.96      
Maximum expected impact using different data sources.
Click on image to zoom it.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1387533 0.6 26 Jul 2021 12:09 6.6M, 30km N/A 370 thousand (in 100km) 0.1m (at 00:42) 00:15 PTWC
1387535 0.6 26 Jul 2021 12:09 6.6M, 30km N/A 380 thousand (in 100km) 0.1m (at 00:42) 00:19 NTWC
1387536 0 26 Jul 2021 12:09 6.2M, 10.67km 6.32 less than 100 (in MMI>=VII) 0.1m (at 00:07) 00:29 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.

Tsunami affected locations

The maximum Wave height is  0.1m in Bolaang, Indonesia. This height is estimated for 26-Jul-2021 12:51:51.

Alert Date (UTC) Name Country Wave height (m)
26-Jul-2021 12:51:51 Bolaang Indonesia  0.1
26-Jul-2021 12:26:24 Lebiti Indonesia  0.1
26-Jul-2021 12:09:00 Bunta Indonesia  0.1

See full locations list (RSS)


Initial conditions

Title: ""M 6.6, 78 km WNW of Luwuk, Indonesia""

Fault parameters

  • Length: 31 km
  • Width: 8 km
  • Magnitude: 6.6 M

Okada parameters:

  • Slip: .9 m
  • Strike: 90 (geogr angle: north=0, south=180)
  • Dip: 45 degree
  • Rake: 90 degree
  • Depth: 30 km

Calculation parameters

  • Calculation space (lon/lat): 120.6, -2.3, 123.6, .7
  • Instead of Step -> use Cell size:.25 minutes

Sea Level

More information

  • Timeline:
    Tsunami calculations performed to this case, click here

  • Montecarlo:
    Tsunami Montecarlo simulation performed to this case, click here

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