M 6.8 in Japan on 05 Sep 2018 18:07 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: 6.8M
Depth: 10 Km
Event Date: 05 Sep 2018 18:07 UTC
06 Sep 2018 03:07 Local
Exposed Population: 3360000 people within 100km
Source: GEOFON gfz2018rkrd
Inserted at: 05 Sep 2018 18:20 UTC
INFORM Coping capacity of the alert score:
1.5 (Japan)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake Tsunami GDACS score
GEOFON 0.8 0 0.8
gfz2018rkrd Scaled population (vector) 6.88 Max wave alert 0m  
  C1 earthquake 0.73 Max wave realtime 0m  
  C2 earthquake -0.22      
  Country Vulnerability -0.71      
  INFORM_normalised 0.57      
Maximum expected impact using different data sources.
Click on image to zoom it.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1227149 0.8 05 Sep 2018 18:07 6.8M, 10km N/A 3.4 million (in 100km) 0m (at 00:00) 00:12 GEOFON
1227151 0.4 05 Sep 2018 18:07 6.7M, 39km N/A 3.4 million (in 100km) 0m (at 00:00) 00:18 PTWC
1227153 0.4 05 Sep 2018 18:07 6.7M, 39km N/A 3.4 million (in 100km) 0m (at 00:00) 00:21 NTWC    
1227156 0 05 Sep 2018 18:07 6.6M, 31km 6.86 20 thousand (in MMI>=VII) 0m (at 00:00) 00:26 NEIC
1227170 0.6 05 Sep 2018 18:07 6.6M, 33.36km 8.64 1.4 million (in MMI>=VII) 0m (at 00:00) 01:38 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: "M6.8 Hokkaido. Japan Region"

Fault parameters

  • Latitude: 42.86
  • Longitude: 141.66
  • Length: 39 km
  • Width: 11 km
  • Magnitude: 6.8 M

Okada parameters:

  • Slip: 1 m
  • Strike: 202 (geogr angle: north=0, south=180)
  • Dip: 21 degree
  • Rake: 90 degree
  • Depth: 10 km

Calculation parameters

  • Calculation space (lon/lat): 138.66, 39.86, 144.66, 45.86
  • Instead of Step -> use Cell size:.45 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.