M 6.2 in Japan from 28 Mar 2023 09:18 UTC to 09:18

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: 6.2M
Depth: 30.947 Km
Event Date: 28 Mar 2023 09:18 UTC
28 Mar 2023 19:18 Local
Exposed Population: 30 thousand in MMI IV
Source: NEIC us6000k09q
Inserted at: 28 Mar 2023 09:40 UTC
INFORM Coping capacity of the alert score:
1.1 (Japan)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 Tsunami GDACS score
NEIC 0 0 0
us6000k09q Scaled population (raster) 0 Max wave alert 0m  
  C1 shakemap 0 Max wave realtime 0m  
  C2 shakemap 0      
  Country Vulnerability 0      
  INFORM_normalised 0      
Maximum expected impact using different data sources.
Click on image to zoom it.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1497767 0 28 Mar 2023 09:18 6.2M, 30.947km 3.91 N/A (in MMI>=VII) 0m (at 00:00) 00:22 NEIC
1497771 0 28 Mar 2023 09:18 6M, 34km 3.77 N/A (in MMI>=VII) 01:17 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: ""Hokkaido""

Fault parameters

  • Latitude: 41.147
  • Longitude: 142.799
  • Length: 19 km
  • Width: 5 km
  • Magnitude: 6.2 M

Okada parameters:

  • Slip: .6 m
  • Strike: 202 (geogr angle: north=0, south=180)
  • Dip: 21 degree
  • Rake: 90 degree
  • Depth: 31 km

Calculation parameters

  • Calculation space (lon/lat): 141.299, 39.647, 144.299, 42.647
  • Instead of Step -> use Cell size:.25 minutes

Sea Level

More information

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

  • Montecarlo:
    Tsunami Montecarlo simulation performed to this case, click here

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