M 6.6 in Northern Mariana Islands from 28 Aug 2018 22:35 UTC to 22:35

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: 6.6M
Depth: 53 Km
Event Date: 28 Aug 2018 22:35 UTC
29 Aug 2018 08:35 Local
Exposed Population: No people within 100km
Source: NTWC     at00pe702n
Inserted at: 28 Aug 2018 22:47 UTC
INFORM Coping capacity of the alert score:
1.1 (Northern Mariana Is.)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake Tsunami GDACS score
NTWC     0 0 0
at00pe702n Scaled population (vector) 0 Max wave alert 0m  
  C1 earthquake 1 Max wave realtime 0m  
  C2 earthquake 0      
  Country Vulnerability 0      
  INFORM_normalised 1      
Maximum expected impact using different data sources.
Click on image to zoom it.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1226168 0 28 Aug 2018 22:35 6.5M, 10km N/A No people affected (in 100km) 0m (at 00:00) 00:06 GEOFON
1226170 0 28 Aug 2018 22:35 6.6M, 51.3km 4.1 N/A (in MMI>=VII) 0m (at 00:00) 00:10 PTWC
1226172 0 28 Aug 2018 22:35 6.6M, 53km N/A No people affected (in 100km) 0m (at 00:00) 00:11 NTWC    
1226176 0 28 Aug 2018 22:35 6.4M, 59.9km 4.04 N/A (in MMI>=VII) 0m (at 00:00) 00:20 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.

Tsunami affected locations

Alert Date (UTC) Name Country Wave height (m)

See full locations list (RSS)


Initial conditions

Title: "161km ENE of Anatahan"

Fault parameters

  • Latitude: 16.784
  • Longitude: 147.109
  • Length: 31 km
  • Width: 8 km
  • Magnitude: 6.6 M

Okada parameters:

  • Slip: .9 m
  • Strike: 180 (geogr angle: north=0, south=180)
  • Dip: 26 degree
  • Rake: 90 degree
  • Depth: 51 km

Calculation parameters

  • Calculation space (lon/lat): 145.609, 15.284, 148.609, 18.284
  • Instead of Step -> use Cell size:.25 minutes

Sea Level

More information

  • Timeline:
    Tsunami calculations performed to this case, click here

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