M 6.8 in Philippines from 23 Jul 2021 20:48 UTC to 20:48

Hazard models

EQ parameters
Shakemap
Tsunami

Event summary

This earthquake is expected to have a medium humanitarian impact based on the magnitude and the affected population and their vulnerability.

Earthquake Magnitude: 6.8M
Depth: 104 Km
Event Date: 23 Jul 2021 20:48 UTC
24 Jul 2021 04:48 Local
Exposed Population: 12980000 people within 100km
Source: NTWC at00qwpttl
Inserted at: 23 Jul 2021 21:14 UTC
INFORM Coping capacity of the alert score:
4.2 (Philippines)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake Tsunami GDACS score
NTWC 1.2 0 1.2
at00qwpttl Scaled population (vector) 6.68 Max wave alert 0m  
  C1 earthquake 1 Max wave realtime 0m  
  C2 earthquake 0      
  Country Vulnerability -0.18      
  INFORM_normalised 0.89      
Maximum expected impact using different data sources.
Click on image to zoom it.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1387166 1.2 23 Jul 2021 20:49 6.8M, 104.3km N/A 13 million (in 100km) 0m (at 00:00) 00:19 PTWC
1387168 1.2 23 Jul 2021 20:48 6.8M, 104km N/A 13 million (in 100km) 0m (at 00:00) 00:26 NTWC
1387170 0.3 23 Jul 2021 20:48 6.7M, 112km 5.03 N/A (in MMI>=VII) 0m (at 00:00) 00:35 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.

Tsunami affected locations

Alert Date (UTC) Name Country Wave height (m)

See full locations list (RSS)


Initial conditions

Title: ""14 km WSW of Calatagan""

Fault parameters

  • Latitude: 13.8
  • Longitude: 120.5
  • Length: 39 km
  • Width: 11 km
  • Magnitude: 6.8 M

Okada parameters:

  • Slip: 1 m
  • Strike: 306 (geogr angle: north=0, south=180)
  • Dip: 36 degree
  • Rake: 90 degree
  • Depth: 104 km

Calculation parameters

  • Calculation space (lon/lat): 117.5, 10.8, 123.5, 16.8
  • Instead of Step -> use Cell size:.5 minutes

Sea Level

More information

  • Timeline:
    Tsunami calculations performed to this case, click here

  • Montecarlo:
    Tsunami Montecarlo simulation performed to this case, click here

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