M 4.7 in Japan on 20 Aug 2017 17:00 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: 4.7M
Depth: 95.07 Km
Lat/Lon: 27.0278 , 127.3294
Event Date: 20 Aug 2017 17:00 UTC
21 Aug 2017 01:00 Local
Exposed Population:
900000 people within 100km
Source: NEIC us2000a9yh
Inserted at: 20 Aug 2017 18:03 UTC
INFORM Coping capacity of the alert score
1.5 (Japan)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC -1 -1
us2000a9yh 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
1178050 -1 20 Aug 2017 17:00 4.7M, 95.07km N/A 900 thousand (in 100km) 01:03 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 Okinawa (population 1,242,315) . The nearest places are Aguni, Hama, Higashieue, Izena, Shimajiri, Gakiya, Maetomari, and Tana.

Radius Population
100 km 900000 people
75 km 18000 people
50 km <1000 people
20 km no people
10 km no people
5 km no people
2 km no people

Affected Provinces

Region Province Country Population
Okinawa Japan 1.2 million people
Kyushu Japan 13.3 million people

Affected populated places

Name Region Province Country City class Population Distance
Aguni Okinawa Japan Village - 50 km
Hama Okinawa Japan Village - 51 km
Higashieue Okinawa Japan Village - 60 km
Izena Okinawa Japan Village - 61 km
Shimajiri Okinawa Japan Village - 61 km
Gakiya Okinawa Japan Village - 63 km
Maetomari Okinawa Japan Village - 64 km
Tana Okinawa Japan Village - 65 km

see full list

Critical infrastructure

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

Airports

Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Ie Jima IEJ 75 Civ. Paved No 4900 57 km
Kadena AB DNA 45 Mil. Paved Yes 12100 86 km
Futenma Mcas 75 Mil. Paved Yes 9000 94 km
Naha OKA 5 Civ. Paved Yes 9800 97 km

Ports

Name LOCODE Country Distance
Oku Japan 83 km
Kume Island Japan 93 km
Naha JPNAH Japan 97 km

Dams

Reservoir Dam Name River Year Distance
Zukeyama Kurashiki Yonabarugawa 1995 85 km
Okukubi Okukubigawa 2001 86 km
Kannako Kanna Kannafukujigawa 1993 86 km

More information

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