M 5.4 Off-shore from 23 Apr 2023 23:39 UTC to 23:39

Hazard models

Rapid Impact
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: 5.4M
Depth: 108.91 Km
Lat/Lon: -59.5577 , -26.5052
Event Date: 23 Apr 2023 23:39 UTC
23 Apr 2023 21:39 Local
Exposed Population:
Source: NEIC us6000k6m6
Inserted at: 24 Apr 2023 00:03 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
us6000k6m6 Scaled population (vector) 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
1502040 0 23 Apr 2023 23:39 5.4M, 108.91km 3.8 No people affected (in 100km) 00:23 NEIC
1502235 0 23 Apr 2023 23:39 5.4M, 75.849km 3.86 No people affected (in 100km) 1d 03:03 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 1502040 -26.505/-59.558 5.4 108.9 3.798 24 Apr 2023 00:07 00:28 (new episode)
2 0 1502040 -26.505/-59.558 5.4 108.9 3.798 24 Apr 2023 01:43 02:04 (upd of #1)
3 0 1502040 -26.505/-59.558 5.4 108.9 3.798 24 Apr 2023 23:51 1d 00:11 (upd of #2)
4 0 1502235 -26.446/-59.544 5.4 75.8 3.859 25 Apr 2023 03:40 1d 04:00 (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.