M 6.6 in Tonga from 26 May 2024 20:47 UTC to 20:47

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: 6.6M
Depth: 163 Km
Event Date: 26 May 2024 20:47 UTC
27 May 2024 09:47 Local
Exposed Population: 6 thousand in MMI V
Source: NTWC at00se41qg
Inserted at: 26 May 2024 21:01 UTC
INFORM Coping capacity of the alert score:
1.1 (Tonga)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Rapid Impact)		 Tsunami GDACS score
NTWC 0 0 0
at00se41qg Scaled population (vector) 0 Max wave alert 0m  
  C1 rapid impact 0 Max wave realtime 0m  
  C2 rapid impact 0      
  Country Vulnerability 0      
  INFORM_normalised 0      
Maximum expected impact using different data sources.
Click on image to zoom it.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1573253 0 26 May 2024 20:47 6.6M, 157.1km N/A 10 thousand (in 100km) 0m (at 00:00) 00:08 PTWC
1573256 0 26 May 2024 20:47 6.6M, 163km N/A 6 thousand (in 100km) 0m (at 00:00) 00:13 NTWC
1573258 0 26 May 2024 20:47 6.6M, 112.2km 6.31 N/A (in MMI>=VII) 0m (at 00:00) 00:17 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

Alert Date (UTC) Name Country Wave height (m)

See full locations list (RSS)


Initial conditions

Title: ""M 6.6, 33 km NNW of Fangale’ounga, Tonga""

Fault parameters

  • Latitude: -19.5
  • Longitude: -174.5
  • Length: 31 km
  • Width: 8 km
  • Magnitude: 6.6 M

Okada parameters:

  • Slip: .9 m
  • Strike: 200 (geogr angle: north=0, south=180)
  • Dip: 33 degree
  • Rake: 90 degree
  • Depth: 163 km

Calculation parameters

  • Calculation space (lon/lat): -176, -21, -173, -18
  • 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.