M 6.4 in China on 20 Apr 2015 01:42 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: 6.4M
Depth: 29 Km
Lat/Lon: 24.1935 , 122.3266
Event Date: 20 Apr 2015 01:42 UTC
20 Apr 2015 09:42 Local
Exposed Population: 750000 people within 100km
Source: NEIC
Inserted at: 20 Apr 2015 02:51 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0.8 0.8
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
1076919 0.7 20 Apr 2015 01:42 6.8M, 0.8km N/A 270 thousand (in 100km) 0.2m (at 00:47) 00:10 PTWC
1076922 0.5 20 Apr 2015 01:43 6.6M, 1km N/A 420 thousand (in 100km) 0.2m (at 00:47) 00:12 NTWC    
1076927 0.5 20 Apr 2015 01:42 6.6M, 28.9km N/A 750 thousand (in 100km) 0.1m (at 00:39) 00:22 NEIC
1076933 0.8 20 Apr 2015 01:42 6.4M, 29km 4.73 750 thousand (in 100km) 01:08 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 China , Province of Taiwan (population 22,456,987) . The nearest places are Nan-ao, Ao-hua, Su-ao, Kubura, Hua-lien, and I-lan.

Radius Population
100 km 710000 people
75 km 130000 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
Taiwan China 22.5 million people
Okinawa Japan 1.2 million people
Fujian China 33.3 million people
Zhejiang China 45.9 million people

Affected populated places

Name Region Province Country City class Population Distance
Nan-ao I-lan Taiwan City - 62 km
Ao-hua I-lan Taiwan Village - 63 km
Su-ao I-lan Taiwan City - 66 km
Kubura Okinawa Japan Village - 69 km
Hua-lien Hua-lien Taiwan Major city - 78 km
I-lan I-lan Taiwan Major city - 87 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
Yonaguni OGN 21 Civ. Paved Yes 4900 73 km
Hualien HUN 16 Civ. Paved Yes 9000 74 km
9 0 84 km

Ports

Name LOCODE Country Distance
Suao TWSUO Taiwan 66 km
Hualien TWHUN Taiwan 75 km

Nuclear plants

Name Country Reactors Distance
LUNG-MEI TAIWAN 2 67 km

More information

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