M 6.6 in United States on 15 Aug 2018 21:56 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: 6.6M
Depth: 20 Km
Event Date: 15 Aug 2018 21:56 UTC
15 Aug 2018 12:56 Local
Exposed Population: No people within 100km
Source: NEIC us1000ga0z
Inserted at: 15 Aug 2018 23:54 UTC
INFORM Coping capacity of the alert score:
2.2 (United States)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 Tsunami GDACS score
NEIC 0 0 0
us1000ga0z Scaled population (vector) 0 Max wave alert 0m  
  C1 shakemap -0.59 Max wave realtime 0m  
  C2 shakemap 0.53      
  Country Vulnerability 0      
  INFORM_normalised 0.65      
Maximum expected impact using different data sources.
Click on image to zoom it.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1224211 0 15 Aug 2018 21:56 6.5M, 35km N/A No people affected (in 100km) 0m (at 00:00) 00:05 NTWC    
1224213 0 15 Aug 2018 21:56 6.5M, 10km N/A No people affected (in 100km) 0m (at 00:00) 00:08 GEOFON
1224214 0 15 Aug 2018 21:56 6.5M, 35km N/A No people affected (in 100km) 0m (at 00:00) 00:10 PTWC
1224217 0 15 Aug 2018 21:56 6.6M, 31.59km 5.97 N/A (in MMI>=VII) 0m (at 00:00) 00:18 NEIC
1224231 0 15 Aug 2018 21:56 6.6M, 20km 6.24 N/A (in MMI>=VII) 0m (at 00:00) 01:57 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: "50km S of Tanaga Volcano"

Fault parameters

  • Latitude: 51.435
  • Longitude: -178.054
  • Length: 31 km
  • Width: 8 km
  • Magnitude: 6.6 M

Okada parameters:

  • Slip: .9 m
  • Strike: 265 (geogr angle: north=0, south=180)
  • Dip: 15 degree
  • Rake: 90 degree
  • Depth: 20 km

Calculation parameters

  • Calculation space (lon/lat): -179.554, 49.935, -176.554, 52.935
  • Instead of Step -> use Cell size:.19 minutes

Sea Level

More information

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

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