M 5.5 in Japan on 21 Oct 2021 08:36 UTC
EQ parameters

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: 5.5M
Depth: 336.77 Km
Lat/Lon: 32.1029 , 138.2283
Event Date: 21 Oct 2021 08:36 UTC
21 Oct 2021 17:36 Local
Exposed Population:
No people affected in 100km
Source: NEIC us6000fwdc
Inserted at: 21 Oct 2021 08:57 UTC
INFORM Coping capacity of the alert score: 1.1 (Japan)


For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0 0
us6000fwdc Scaled population (vector) 0  
  C1 earthquake 1  
  C2 earthquake 0  
  Country Vulnerability 0  
  INFORM_normalised 1  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1403631 0 21 Oct 2021 08:36 5.5M, 336.77km N/A No people affected (in 100km) 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.

Exposed population

The earthquake happened in Japan , Region of Kinki (population 22,207,000) .

Radius Population
100 km no people
75 km no people
50 km no people
20 km no people
10 km no people
5 km no people
2 km no people

Affected Provinces

Region Province Country Population
Kinki Japan 22.2 million people
Chubu Japan 5.1 million people
Kanto Japan 38.5 million people
Shikoku Japan 4.3 million people
Chugoku Japan 7.9 million people

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

More information

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