M 6.3 in Pacific-Antarctic Ridge on 12 Dec 2018 13:13 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
Lat/Lon: -55.799 , -128.4776
Event Date: 12 Dec 2018 13:13 UTC
12 Dec 2018 04:13 Local
Exposed Population: No people within 100km
Source: NEIC us2000isw3
Inserted at: 13 Dec 2018 07:09 UTC
INFORM Coping capacity of the alert score: 1.1 ()

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)
Tsunami GDACS score
NEIC 0 0 0
us2000isw3 Scaled population (vector) 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
1240885 0 12 Dec 2018 13:14 5.5M, 10km N/A No people affected 00:24 NEIC
1240922 0 12 Dec 2018 13:13 6.3M, 10km N/A No people affected 0m (at 00:00) 04:00 NEIC
1240991 0 12 Dec 2018 13:13 6.3M, 10km N/A No people affected 0m (at 00:00) 17:55 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 unknowed a zone. The alertlevel for this event is GREEN

Intensity Population
no people


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1240885 -56.007/-127.814 5.5 10 0 12 Dec 2018 13:38 00:24 (new episode)
2 0 1240885 -56.007/-127.814 5.5 10 0 12 Dec 2018 15:16 02:02 (upd of #1)
3 0 1240922 -56.007/-127.814 5.5 10 0 12 Dec 2018 17:14 04:00 (new episode)
4 0 1240922 -55.922/-128.215 6.3 10 0 12 Dec 2018 17:16 04:02 (upd of #3)
5 0 1240991 -55.799/-128.478 6.3 10 0 13 Dec 2018 07:09 17:55 (new episode)

Affected Provinces



Critical infrastructure

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

More information

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