M 5.8 Off-shore on 31 Aug 2020 20:28 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: 5.8M
Depth: 10 Km
Lat/Lon: -54.9757 , -130.0867
Event Date: 31 Aug 2020 20:28 UTC
31 Aug 2020 11:28 Local
Exposed Population: No people within 100km
Source: NEIC us7000bffs
Inserted at: 01 Sep 2020 20:32 UTC
INFORM Coping capacity of the alert score: 1.1 ()

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 GDACS score
NEIC 0 0
us7000bffs Scaled population (raster) 0  
  C1 shakemap -0.59  
  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
1329484 0 31 Aug 2020 20:28 5.8M, 10km N/A No people affected (in 100km) 02:03 NEIC
1329692 0 31 Aug 2020 20:28 5.8M, 10km N/A No people affected (in 100km) 02:03 NEIC
1329873 0 31 Aug 2020 20:28 5.8M, 10km N/A No people affected (in 100km) 1d 00:04 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


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1329484 -55.54/-129.763 5.8 10.0 None 31 Aug 2020 20:57 00:29 (new episode)
2 0 1329484 -55.54/-129.763 5.8 10.0 None 31 Aug 2020 22:32 02:03 (upd of #1)
3 0 1329692 -55.495/-129.709 5.8 10.0 None 01 Sep 2020 18:23 21:55 (new episode)
4 0 1329692 -55.495/-129.709 5.8 10.0 None 01 Sep 2020 20:32 1d 00:04 (upd of #3)
5 0 1329873 -54.976/-130.087 5.8 10.0 None 02 Sep 2020 15:57 1d 19:29 (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.