M 4.5 in China on 16 Apr 2021 16:21 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: 4.5M
Depth: 19.25 Km
Lat/Lon: 23.9297 , 122.0837
Event Date: 16 Apr 2021 16:21 UTC
17 Apr 2021 00:21 Local
Exposed Population:
700000 people within 100km
Source: NEIC us6000e24g
Inserted at: 16 Apr 2021 17:01 UTC
INFORM Coping capacity of the alert score
3.6 (China)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0 0
us6000e24g Scaled population (vector) 5.53  
  C1 earthquake 1.39  
  C2 earthquake -0.24  
  Country Vulnerability 0.26  
  INFORM_normalised 0.82  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1370441 0 16 Apr 2021 16:21 4.5M, 19.25km N/A 710 thousand (in 100km) 00:39 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 Hua-lien, Hsin-ch'eng, Ta-shan, T'ieh-chia-lung-she, Ch'u-yin, Shui-lien, Ao-hua, Jung-shu, Chia-lu-lan, Feng-shan, and I-lan.

Radius Population
100 km 710000 people
75 km 270000 people
50 km 110000 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
Guangdong China 69.6 million people

Affected populated places

Name Region Province Country City class Population Distance
Hua-lien Hua-lien Taiwan Major city - 50 km
Hsin-ch'eng Hua-lien Taiwan City - 51 km
Ta-shan Hua-lien Taiwan Village - 52 km
T'ieh-chia-lung-she Hua-lien Taiwan City - 52 km
Ch'u-yin Hua-lien Taiwan Village - 56 km
Shui-lien Hua-lien Taiwan Village - 56 km
Ao-hua I-lan Taiwan Village - 58 km
Jung-shu Hua-lien Taiwan Village - 60 km
Chia-lu-lan Hua-lien Taiwan Village - 61 km
Feng-shan Hua-lien Taiwan Village - 62 km
Feng-lin Hua-lien Taiwan Village - 67 km
Nan-ao I-lan Taiwan City - 67 km
Feng-pin Hua-lien Taiwan Village - 69 km
Feng-kuang Hua-lien Taiwan Village - 69 km
I-lan I-lan Taiwan Major city - 99 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
Hualien HUN 16 Civ. Paved Yes 9000 49 km
Lishan LHN unknown 0 95 km
9 0 96 km

Ports

Name LOCODE Country Distance
Hualien TWHUN Taiwan 47 km
Suao TWSUO Taiwan 78 km

Nuclear plants

Name Country Reactors Distance
LUNG-MEI TAIWAN 2 66 km

More information

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