M 6.3 in South Georgia and the South Sandwich Islands on 26 Jul 2020 00:53 UTC

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: 6.3M
Depth: 10 Km
Event Date: 26 Jul 2020 00:53 UTC
25 Jul 2020 22:53 Local
Exposed Population: No people affected in MMI V
No people within 100km
Source: NEIC us6000b46r
Inserted at: 26 Jul 2020 01:14 UTC
INFORM Coping capacity of the alert score: 1.1 (South Georgia & the South Sandwich Is.)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)
Tsunami GDACS score
NEIC 0 0 0
us6000b46r 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
1323305 0 26 Jul 2020 00:54 6.5M, 33km N/A No people affected 0m (at 00:00) 00:12 PTWC
1323310 0 26 Jul 2020 00:53 6.3M, 10km 3.23 No people affected 0m (at 00:00) 00:20 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

No content available

Alert Date (UTC) Name Country Tsunami wave height (m)

See full locations list (RSS)


Initial conditions

Title: ""M 6.3, South Sandwich Islands region""

Fault parameters

  • Length: 22 km
  • Width: 6 km
  • Magnitude: 6.3 M

Okada parameters:

  • Slip: .6 m
  • Strike: 32 (geogr angle: north=0, south=180)
  • Dip: 15 degree
  • Rake: 90 degree
  • Depth: 10 km

Calculation parameters

  • Calculation space (lon/lat): -26.815, -62.283, -23.815, -59.283
  • 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.