M 6.2 in Northern Mariana Islands from 11 Feb 2018 23:14 UTC to 23:14

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: 6.2M
Depth: 41.9 Km
Lat/Lon: 13.835 , 146.521
Event Date: 11 Feb 2018 23:14 UTC
Exposed Population: No people within 100km
Source: PTWC pt18042001
Inserted at: 11 Feb 2018 23:24 UTC
INFORM Coping capacity of the alert score: 1.1 (Northern Mariana Is.)


For more info on GDACS alert score click here.
  Earthquake Tsunami GDACS score
PTWC 0 0 0
pt18042001 Scaled population (vector) 0 Max wave scenario 0.01m  
  C1 earthquake 1 Max wave realtime 0m  
  C2 earthquake 0      
  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
1198498 0 11 Feb 2018 23:14 6.2M, 41.9km N/A No people affected 0m (at 00:00) 00:09 PTWC
1198501 0 11 Feb 2018 23:14 6M, 10km 3.64 No people affected 00:17 NEIC
The episode that generated the alert; the next major evaluations beyond 12 hours will not trigger additional alerts.
* 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.

Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1198501 13.806/146.411 6 10 3.34 11 Feb 2018 23:34 00:20 (new episode)
2 0 1198501 13.806/146.411 6 10 3.64 12 Feb 2018 01:18 02:04 (upd of #1)

Affected Provinces

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Affected populated places. Areas of interest

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see full list

Critical infrastructure

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


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Nuclear plants

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More information

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