M 6.8 in Japan on 01 May 2021 01:27 UTC

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: 47.3 Km
Event Date: 01 May 2021 01:27 UTC
01 May 2021 10:27 Local
Exposed Population: 1350000 people in MMI VI
2450000 people within 100km
Source: NEIC us7000dz5t
Inserted at: 01 May 2021 01:49 UTC
INFORM Coping capacity of the alert score:
1.5 (Japan)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)
Tsunami GDACS score
NEIC 0 0 0
us7000dz5t Scaled population (vector) 0 Max wave alert 0.08m  
  C1 shakemap -0.59 Max wave realtime 0.08m  
  C2 shakemap 0.53      
  Country Vulnerability 0      
  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
1372992 0.1 01 May 2021 01:27 6.6M, 56km N/A 2.2 million (in 100km) 0m (at 00:00) 00:08 PTWC
1372994 0.1 01 May 2021 01:27 6.6M, 56km N/A 2.2 million (in 100km) 0m (at 00:00) 00:14 NTWC
1372999 0 01 May 2021 01:27 6.8M, 47.3km 6.42 less than 100 (in MMI>=VII) 0.1m (at 00:52) 00:21 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

The maximum Tsunami wave height is  0.1m in Samenoura, Japan. This height is estimated for 1-May-2021 02:19:27.

Alert Date (UTC) Name Country Tsunami wave height (m)
1-May-2021 02:19:27 Samenoura Japan  0.1
1-May-2021 02:19:27 Onagawahama Japan  0.1
1-May-2021 02:19:27 Ommaehama Japan  0.1
1-May-2021 02:19:27 Izushima Japan  0.1
1-May-2021 02:19:27 Yoriiso Japan  0.1
1-May-2021 02:19:27 Terama Japan  0.1
1-May-2021 02:48:36 Imaizumi Japan  0.1
1-May-2021 02:48:36 Koharagi Japan  0.1
1-May-2021 02:48:36 Rikuzen-Takata Japan  0.1
1-May-2021 02:48:36 Wakinosawa Japan  0.1
1-May-2021 02:48:36 Kogakuchi Japan  0.1
1-May-2021 02:48:36 Kurosaki Japan  0.1
1-May-2021 02:39:05 Shizugawa Japan  0.1
1-May-2021 02:39:05 Aratohama Japan  0.1
1-May-2021 02:39:05 Terahama Japan  0.1
1-May-2021 02:39:05 Kodaki Japan  0.1
1-May-2021 02:48:73 Tomari Japan  0.1
1-May-2021 02:37:16 Tomarihama Japan  0.1
1-May-2021 02:17:89 Nitoda Japan  0.1
1-May-2021 02:17:89 Odomari Japan  0.1
1-May-2021 02:17:89 Kitsunezaki Japan  0.1
1-May-2021 02:17:89 Takenohama Japan  0.1
1-May-2021 02:17:89 Fukkiura Japan  0.1
1-May-2021 02:17:89 Koamikura Japan  0.1
1-May-2021 02:17:89 Yagawa Japan  0.1

See full locations list (RSS)


Initial conditions

Title: ""M 6.8, 38 km ESE of Ishinomaki, Japan""

Fault parameters

  • Length: 39 km
  • Width: 11 km
  • Magnitude: 6.8 M

Okada parameters:

  • Slip: 1 m
  • Strike: 198 (geogr angle: north=0, south=180)
  • Dip: 21 degree
  • Rake: 90 degree
  • Depth: 47 km

Calculation parameters

  • Calculation space (lon/lat): 138.665, 35.23, 144.665, 41.23
  • Instead of Step -> use Cell size:.5 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.