M 6.2 in Tonga on 27 Jan 2022 06:40 UTC

Hazard models

EQ parameters
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: 6.2M
Depth: 4.17 Km
Event Date: 27 Jan 2022 06:40 UTC
26 Jan 2022 18:40 Local
Exposed Population: No people affected in 100km
Source: NEIC us7000gfhb
Inserted at: 27 Jan 2022 07:27 UTC
INFORM Coping capacity of the alert score:
1.1 (Tonga)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 Tsunami GDACS score
NEIC 0 0 0
us7000gfhb Scaled population (raster) 0 Max wave alert 0m  
  C1 shakemap -0.59 Max wave realtime 0m  
  C2 shakemap 0.53      
  Country Vulnerability 0      
  INFORM_normalised 1      
Maximum expected impact using different data sources.
Click on image to zoom it.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1423415 0 27 Jan 2022 06:40 6.2M, 14.5km 3.64 N/A (in MMI>=VII) 0m (at 00:00) 00:21 NEIC
1423417 0 27 Jan 2022 06:40 6.2M, 4.17km 3.62 N/A (in MMI>=VII) 0m (at 00:00) 00:47 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 6.2, 225 km WNW of Pangai, Tonga""

Fault parameters

  • Latitude: -19.068
  • Longitude: -176.349
  • Length: 19 km
  • Width: 5 km
  • Magnitude: 6.2 M

Okada parameters:

  • Slip: .6 m
  • Strike: 206 (geogr angle: north=0, south=180)
  • Dip: 32 degree
  • Rake: 90 degree
  • Depth: 4 km

Calculation parameters

  • Calculation space (lon/lat): -177.849, -20.568, -174.849, -17.568
  • 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.