M 6.9 in Antarctica on 23 Jan 2021 23:36 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: 6.9M
Depth: 9.58 Km
Lat/Lon: -61.825 , -55.4937
Event Date: 23 Jan 2021 23:36 UTC
23 Jan 2021 19:36 Local
Exposed Population: No people within 100km
Source: NEIC us7000d2rx
Inserted at: 24 Jan 2021 00:48 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 Tsunami GDACS score
NEIC 0 0 0
us7000d2rx 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.

ShakeMap is a product of the USGS Earthquake Hazards Program in conjunction with the regional seismic networks. ShakeMaps provide near-real-time maps of ground motion and shaking intensity following significant earthquakes.


Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1354501 0 23 Jan 2021 23:36 7.3M, 10km N/A No people affected (in 100km) 0m (at 00:00) 00:14 NTWC
1354505 0 23 Jan 2021 23:36 7M, 7.76km 4.86 No people affected (in 100km) 0m (at 00:00) 00:19 NEIC
1354516 0 23 Jan 2021 23:36 6.9M, 9.58km 5.18 No people affected (in 100km) 0m (at 00:00) 01:11 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

The earthquake happened in Antarctica ,of Antarctica. The alertlevel for this event is GREEN

Intensity Population


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1354505 -61.848/-55.559 7.0 7.8 4.855 23 Jan 2021 23:58 00:21 (new episode)
2 0 1354516 -61.825/-55.494 6.9 9.6 4.251 24 Jan 2021 00:51 01:14 (new episode)
3 0 1354516 -61.825/-55.494 6.9 9.6 4.251 24 Jan 2021 01:42 02:05 (upd of #2)
4 0 1354516 -61.825/-55.494 6.9 9.6 5.184 24 Jan 2021 23:42 1d 00:05 (upd of #3)

Affected Provinces

Intensity Region Province Country Population
Antarctica Antarctica no people
Antarctica Antarctica no people


Critical infrastructure

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

Airports

Intensity Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Teniente Rodolfo Marsh Martin TNM 45 0 187 km
Petrel 5 0 188 km

Ports

Intensity Name LOCODE Country Distance
Admiralty Bay Antarctica 156 km

More information

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