M 4.9 in Taiwan Region on 01 Aug 2022 08:09 UTC
Rapid Impact

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: 4.9M
Depth: 10 Km
Lat/Lon: 21.4757 , 121.1941
Event Date: 01 Aug 2022 08:09 UTC
01 Aug 2022 16:09 Local
Exposed Population:
110 thousand in MMI III
Source: NEIC us6000i74a
Inserted at: 01 Aug 2022 08:48 UTC
INFORM Coping capacity of the alert score: 1.1 ()


For more info on GDACS alert score click here.
(Rapid Impact)
GDACS score
NEIC 0.3 0.3
us6000i74a Scaled population (raster) 0  
  C1 rapid impact -0.08  
  C2 rapid impact 0.4  
  Country Vulnerability 0  
  INFORM_normalised 1.71  
Maximum expected impact using different data sources.

The green area correspond to areas affected by strong shaking (MMI VI or higher) according to the simulation.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1456165 0.3 01 Aug 2022 08:09 4.9M, 10km 3.24 less than 100 (in MMI>=VII) N/A 00:38 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.

Rapid Impact

The results presented below are calculated with the ShakeMap open source software (USGS) using only earthquake hypocenter information to provide a rapid estimation of the ground motion and shaking intensity without taking into account any instrumental observations or earthquake source scaling laws.

Exposed population

The earthquake happened in unknowed a zone. The alertlevel for this event is GREEN

Intensity Population
no people

Affected Provinces

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.