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
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.
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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.

Tsunami affected locations

No content available

Alert Date (UTC) Name Country Tsunami wave height (m)

See full locations list (RSS)

Initial conditions

Title: "146km ESE of Rota"

Fault parameters

  • Length: 19 km
  • Width: 5 km
  • Magnitude: 6.2 M

Okada parameters:

  • Slip: .6 m
  • Strike: 217 (geogr angle: north=0, south=180)
  • Dip: 26 degree
  • Rake: 90 degree
  • Depth: 42 km

Calculation parameters

  • Calculation space (lon/lat): 145.021, 12.335, 148.021, 15.335
  • Instead of Step -> use Cell size:.24 minutes

Sea Level

More information

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