M 7.9 in United States on 23 Jan 2018 09:31 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: 7.9M
Depth: 25 Km
Event Date: 23 Jan 2018 09:31 UTC
22 Jan 2018 23:31 Local
Exposed Population: No people within 100km
Source: NEIC us2000cmy3
Inserted at: 23 Jan 2018 10:20 UTC
INFORM Coping capacity of the alert score:
1.1 (United States)
Maximun Wave Height observed: 0.21336 m

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 Tsunami GDACS score
NEIC 0 0.5 0.5
us2000cmy3 Scaled population (vector) 0 Max wave scenario 1.01m  
  C1 shakemap -0.59 Max wave realtime 0.53m  
  C2 shakemap 0.53      
  Country Vulnerability 0      
  INFORM_normalised 1      
Maximum expected impact using different data sources.
Click on image to zoom it.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1195180 0.8 23 Jan 2018 09:31 8M, 20km N/A No people affected (in 100km) 0.8m (at 01:32) 00:05 NTWC    
1195183 0.4 23 Jan 2018 09:31 7.6M, 10km N/A No people affected (in 100km) 0.5m (at 01:40) 00:08 GEOFON
1195185 0.8 23 Jan 2018 09:31 8M, 19km N/A No people affected (in 100km) 0.8m (at 01:32) 00:12 PTWC
1195191 1.2 23 Jan 2018 09:31 8.2M, 10km N/A No people affected (in 100km) 1.4m (at 01:16) 00:16 NEIC
1195196 0.9 23 Jan 2018 09:31 7.9M, 10km N/A No people affected (in 100km) 0.9m (at 01:16) 00:43 NEIC
1195199 0.5 23 Jan 2018 09:31 7.9M, 25km 4.92 N/A (in MMI>=VII) 0.5m (at 02:10) 00:48 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.

Estimated Tsunami affected locations

The maximum observed wave height is 0.21336m in Old Harbor (Alaska);
The maximum Wave height is  0.5m in Nunamiut, United States. This height is estimated for 23-Jan-2018 11:41:00.

Alert Date (UTC) Name Country Wave height (m)
23-Jan-2018 11:41:00 Nunamiut United States  0.5
23-Jan-2018 10:55:00 Kaguyak United States  0.4
23-Jan-2018 11:39:00 Cobol United States  0.4
23-Jan-2018 11:25:00 Yakutat United States  0.4
23-Jan-2018 12:07:00 Port_Lions United States  0.4
23-Jan-2018 10:53:00 Kimshan_Cove United States  0.4
23-Jan-2018 12:11:00 Ouzinkie United States  0.3
23-Jan-2018 12:33:00 Mitrofania United States  0.3
23-Jan-2018 12:05:00 Kodiak United States  0.3
23-Jan-2018 11:01:00 Situk United States  0.3
23-Jan-2018 12:37:00 Elfin_Cove United States  0.3
23-Jan-2018 14:15:00 Ayakulik United States  0.2
23-Jan-2018 13:07:00 Chignik United States  0.2
23-Jan-2018 11:53:00 Portlock United States  0.2
23-Jan-2018 11:13:00 Afognak United States  0.1
23-Jan-2018 13:37:00 Perryville United States  0.1
23-Jan-2018 13:19:00 Chilkat United States  0.1
23-Jan-2018 14:31:00 Gustavus United States  0.1
23-Jan-2018 14:21:00 Bartlett_Cove United States  0.1
23-Jan-2018 10:59:00 Cape_Yakataga United States  0.1
23-Jan-2018 10:49:00 Port_Hobron United States  0.1
23-Jan-2018 14:29:00 San_Juan_Cannery United States  0.1
23-Jan-2018 14:29:00 Port_Ashton United States  0.1
23-Jan-2018 13:51:00 Crystal United States  0.1
23-Jan-2018 10:51:00 Old_Harbor United States  0.1
23-Jan-2018 13:55:00 Lowell_Point United States  0.1
23-Jan-2018 13:55:00 Seward United States  0.1
23-Jan-2018 13:55:00 Bear_Creek United States  0.1
23-Jan-2018 10:37:00 Chiniak United States  0.1
23-Jan-2018 14:01:00 Cordova United States  0.1
23-Jan-2018 10:47:00 Aleksashkina United States  0.1
23-Jan-2018 12:57:00 Katalla United States  0.1
23-Jan-2018 13:45:00 Latouche United States  0.1
23-Jan-2018 13:39:00 Crab_Bay United States  0.1
23-Jan-2018 13:45:00 Chenega United States  0.1
23-Jan-2018 14:05:00 Village United States  0.1
23-Jan-2018 14:23:00 English_Bay United States  0.1
23-Jan-2018 14:23:00 Port_Graham United States  0.1
23-Jan-2018 14:17:00 Port_William United States  0.1
23-Jan-2018 14:07:00 Anchor_Point United States  0.1
23-Jan-2018 13:57:00 Port_Wakefield United States  0.1
23-Jan-2018 13:57:00 Port_Bailey United States  0.1
23-Jan-2018 13:15:00 Karluk United States  0.1
23-Jan-2018 14:27:00 Diamond_Ridge United States  0.1
23-Jan-2018 14:27:00 Homer United States  0.1
23-Jan-2018 14:27:00 Millers_Landing United States  0.1
23-Jan-2018 14:15:00 Seldovia United States  0.1
23-Jan-2018 14:27:00 Kachemak United States  0.1
23-Jan-2018 14:21:00 Jakolof_Bay United States  0.1
23-Jan-2018 11:55:00 Belkofski United States  0.1
23-Jan-2018 13:19:00 Akhiok United States  0.1
23-Jan-2018 14:17:00 Kachemak_Silo United States  0.1
23-Jan-2018 14:25:00 Kamishak United States  0.1
23-Jan-2018 14:25:00 Chenik United States  0.1
23-Jan-2018 13:41:00 Uyak United States  0.1
23-Jan-2018 13:41:00 Larsen_Bay United States  0.1
23-Jan-2018 14:11:00 Orca United States  0.1
23-Jan-2018 14:31:00 Halibut_Cove United States  0.1
23-Jan-2018 13:49:00 Boswell_Bay United States  0.1
23-Jan-2018 12:01:00 Nuchek United States  0.1

See full locations list (RSS)


Initial conditions

Title: "280km SE of Kodiak"

Fault parameters

  • Latitude: NaN
  • Longitude: NaN
  • Length: 141 km
  • Width: 39 km
  • Magnitude: 7.9 M

Okada parameters:

  • Slip: 3.6 m
  • Strike: 180 (geogr angle: north=0, south=180)
  • Dip: 45 degree
  • Rake: 90 degree
  • Depth: 25 km

Calculation parameters

  • Calculation space (lon/lat): -162.573, 42.546, -135.573, 69.546
  • Instead of Step -> use Cell size:2.25 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.