M 6.9 in United States on 27 Jul 2015 04:49 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: 6.9M
Depth: 27.09 Km
Event Date: 27 Jul 2015 04:49 UTC
26 Jul 2015 17:49 Local
Exposed Population: Few people within 100km
Source: NEIC
Inserted at: 27 Jul 2015 05:57 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake Tsunami GDACS score
NEIC 0 0.1 0.5
Scaled population (vector) n.a Max wave scenario 0m  
  C1 earthquake n.a Max wave realtime 0.07m  
  C2 earthquake n.a      
  Country Vulnerability n.a      
  INFORM_normalised n.a      
Maximum expected impact using different data sources.
Click on image to zoom it.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1089825 0.5 27 Jul 2015 04:49 6.9M, 10km N/A Few people (in 100km) 0.1m (at 01:19) 00:07 NTWC    
1089827 0.5 27 Jul 2015 04:49 6.7M, 10km N/A Few people (in 100km) 0.1m (at 00:53) 00:09 GEOFON
1089829 0.5 27 Jul 2015 04:50 6.9M, 9.6km N/A No people affected (in 100km) 0.1m (at 01:19) 00:10 PTWC
1089838 0.5 27 Jul 2015 04:49 6.9M, 11.93km N/A Few people (in 100km) 0.1m (at 01:19) 00:16 NEIC
1089860 0.5 27 Jul 2015 04:49 6.9M, 27.09km 6.79 Few people (in 100km) 0.1m (at 00:53) 01:07 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

The maximum Wave height is  0.1m in Nikolski, United States. This height is estimated for 27-Jul-2015 05:42:01.

Alert Date (UTC) Name Country Wave height (m)
27-Jul-2015 05:42:01 Nikolski United States  0.1

See full locations list (RSS)


Initial conditions

Title: "M6.9 73km SW of Nikolski. Alaska"

Fault parameters

  • Latitude: 52.443
  • Longitude: -169.597
  • Length: 44 km
  • Width: 12 km
  • Magnitude: 6.9 M

Okada parameters:

  • Slip: 1.2 m
  • Strike: 251 (geogr angle: north=0, south=180)
  • Dip: 15 degree
  • Rake: 90 degree
  • Depth: 27 km

Calculation parameters

  • Calculation space (lon/lat): -172.597, 49.443, -166.597, 55.443
  • Instead of Step -> use Cell size:.38 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.