M 4.8 in Japan from 20 Jul 2008 02:22 UTC to 02:23

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.

Updated: this report is based on episode 1.

Earthquake Magnitude: 4.8M
Depth: 38 Km
Lat/Lon: 37.89 , 142.33
Event Date: 20 Jul 2008 02:23 UTC
20 Jul 2008 11:23 Local
Exposed Population:
about 10000 people within 100km
Source: GEOFON
Inserted at: 20 Jul 2008 02:41 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
GEOFON 0.5 0.5
Scaled population (vector) n.a  
  C1 earthquake n.a  
  C2 earthquake n.a  
  Country Vulnerability n.a  
  INFORM_normalised n.a  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
42899 0.5 20 Jul 2008 02:23 5M, 25km N/A 30 thousand (in 100km) 00:13 GEOFON
42900 0.5 20 Jul 2008 02:23 4.8M, 38km N/A 10 thousand (in 100km) 00:18 GEOFON
42901 0.5 20 Jul 2008 02:22 4.9M, 10km N/A No people affected (in 100km) 00:23 NEIC
42905 0.5 20 Jul 2008 02:22 4.7M, 10km N/A No people affected (in 100km) 02:08 NEIC
42934 0.5 20 Jul 2008 02:22 4.7M, 40km N/A No people affected (in 100km) 12:53 EMSC
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 Tohoku (population 9,984,608) .

Radius Population
100 km 140000 people
75 km 2100 people
50 km no people
20 km no people
10 km no people
5 km no people
2 km no people

Affected Provinces

Country Region Province Population
Japan Tohoku 10 million people

Critical infrastructure

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

Ports

Name LOCODE Country Distance
Onagawa JPONG Japan 87 km
Ishinomaki JPISM Japan 95 km

Nuclear plants

Name Country Reactors Distance
ONAGAWA JAPAN 3 81 km

More information

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