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
Lat/Lon: 56.0464 , -149.0728
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)

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.

ShakeMap is a product of the USGS Earthquake Hazards Program in conjunction with the regional seismic networks. ShakeMaps provide near-real-time maps of ground motion and shaking intensity following significant earthquakes.


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.

Exposed population

The earthquake happened in United States ,of Alaska (population 15,430) . The alertlevel for this event is GREEN

Intensity Population
no people


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1195199 56.046/-149.073 7.9 25 5.01 23 Jan 2018 10:25 00:53 (new episode)
2 0 1195199 56.046/-149.073 7.9 25 5.01 23 Jan 2018 10:30 00:58 (upd of #1)
3 0 1195199 56.046/-149.073 7.9 25 4.83 23 Jan 2018 18:18 08:46 (upd of #2)
4 0 1195199 56.046/-149.073 7.9 25 4.83 23 Jan 2018 18:45 09:14 (upd of #3)
5 0 1195199 56.046/-149.073 7.9 25 4.92 24 Jan 2018 22:54 1d 13:22 (upd of #4)
6 0 1195199 56.004/-149.166 7.9 14.06 4.84 02 May 2018 14:24 99d 04:52 (upd of #5)

Affected Provinces

Intensity Region Province Country Population
Alaska United States 360000 people
Alaska United States 4200 people
Yukon Territory Canada <1000 people
British Columbia Canada no people

Affected populated places. Areas of interest

Intensity Name Region Province Country City class Population Distance
Port Hobron Alaska United States Village - 280 km
McCord Alaska United States Village - 281 km
Kodiak Alaska United States City 6300 people 281 km
Nunamiut Alaska United States Village - 298 km
Kaguyak Alaska United States Village - 304 km
Afognak Alaska United States Village - 314 km
Port O'Brien Alaska United States Village - 320 km
Port Bailey Alaska United States Village - 320 km
Port Wakefield Alaska United States Village - 329 km
Port William Alaska United States Village - 345 km
Uyak Alaska United States Village - 349 km
Ayakulik Alaska United States Village - 359 km
Millers Landing Alaska United States Village - 427 km
Homer Alaska United States Village 3900 people 427 km
Diamond Ridge Alaska United States Village 1800 people 430 km
Anchor Point Alaska United States Village 1800 people 447 km
Seward Alaska United States Major city 2800 people 455 km
Bear Creek Alaska United States Village 1700 people 459 km
Woodrow Alaska United States Village - 462 km
Kasilof Village Alaska United States Village - 496 km
Cohoe Alaska United States Village 1200 people 499 km
Kalifornsky Alaska United States Village 5800 people 504 km
Soldotna Alaska United States Village 3800 people 508 km
Soldocna Alaska United States Village - 509 km
Sterling Alaska United States Village 4700 people 510 km
Kenai Alaska United States Village 6900 people 519 km
Nikisnka Alaska United States Village - 533 km
Nikiski Alaska United States Village 4300 people 538 km
Nkishka No 2 Alaska United States Village - 538 km
Spenard Alaska United States Village - 575 km
Nunaka Valley Alaska United States Village - 576 km
Anchorage Alaska United States Major city 260000 people 576 km
Eagle River Alaska United States Village - 589 km
Chugiak Alaska United States Village - 596 km
Birchwood Alaska United States Village - 597 km
Eklutna Alaska United States Village - 603 km
Matanuska Alaska United States Village - 612 km
Portage Alaska United States Village - 533 km
Girdwood Alaska United States Village - 546 km
Valdez Alaska United States Village 4000 people 588 km
Chisana Alaska United States Village - 781 km
Beaver Creek Yukon Canada Village - 844 km
Indian Village Alaska United States Village - 871 km

see full list


Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

Airports

Intensity Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Kodiak / Lily Lake 40 0 280 km
Kodiak Municipal KDK 22 Civ. Paved Yes 7500 282 km
Old Harbor 17 0 289 km
Ouzinkie 17 0 295 km
Blue Fox Bay BFB unknown 0 302 km
Kizhuyak KZH unknown 0 302 km
Port Lions ORI 16 0 308 km
Kitoi Bay KKB unknown 0 311 km
Seal Bay SYB unknown 0 314 km
Sitkinak SKJ unknown 0 318 km
Danger Bay DGB unknown 0 318 km
Port Bailey KPY unknown 0 319 km
San Juan / Uganik WSJ unknown 0 320 km
Pleasant Harbor PTR unknown 0 320 km
Akhiok AKK 13 0 330 km
Moser Bay KMY unknown 0 330 km
Amook Bay unknown 0 331 km
Zachar Bay KZB unknown 0 331 km
Alitak ALZ unknown 0 332 km
Onion Bay ONN unknown 0 333 km
West Point Village KWP unknown 0 334 km
Karluk Lake KKL 112 0 337 km
Uganik UGI unknown 0 337 km
Olga Bay KOY unknown 0 340 km
Larsen Bay 23 0 342 km
Port Williams KPR unknown 0 345 km
Karluk KYK 42 0 370 km
Middleton Island MDO 27 Civ. Unpaved Yes 3900 413 km
Homer HOM 24 Civ. Paved Yes 7400 425 km
Glacierview Strip 488 0 433 km
Seward SWD 7 Civ. Paved No 4200 455 km
Ninilchik NIN 84 0 467 km
Winter's Strip 34 0 493 km
Quartz Creek JLA 137 0 496 km
Kasilof 38 0 497 km
Soldotna SXQ 33 Civ. Paved Yes 5000 507 km
Dahler Homestead 91 0 508 km
Rotor Air 61 0 508 km
Gaede 35 0 508 km
Dutch Landing Strip 91 0 511 km
Doyle Estates 15 0 513 km
Mackeys Lakes 53 0 513 km
Kenai Municipal ENA 28 Civ. Paved Yes 7500 520 km
Arness Lake 38 0 528 km
Carty's Airstrip 46 0 535 km
Offshore Ststems-Kenai 46 0 539 km
Rabbit Creek 11 0 563 km
Flying Crown 14 0 565 km
Campbell Airstrip 87 0 571 km
Anchorage International ANC 44 Civ. Paved Yes 11500 574 km
Merrill Field MRI 42 Civ. Paved Yes 4000 577 km
Elmendorf AFB EDF 65 Mil. Paved Yes 10000 581 km
Bryant Ahp FRN 115 0 582 km
Sleepers Strip 38 0 582 km
Point Mackenzie 22 0 582 km
Valdez VDZ 37 Civ. Paved Yes 6500 590 km
Hilltop 114 0 599 km
Birchwood 29 Civ. Paved No 4000 600 km
Big Lake BGQ 46 0 613 km
Colberg 38 0 614 km
Drift River DRF 9 0 537 km
Girdwood AQY 46 0 548 km
Trading Bay Production 61 0 554 km
Icy Bay ICY 15 0 618 km
Yakutat YAK 10 Civ. Paved Yes 7700 679 km
Situk 15 0 689 km
Dangerous River 15 0 697 km
Glennallen GLQ unknown 0 705 km
Gulkana GKN 481 Civ. Paved Yes 5000 711 km
Taylor Mountain 305 0 723 km
Chisana CZN 1011 0 782 km
Nikolai NIB 126 0 832 km
Beaver Creek YXQ 649 Civ. Unpaved No 3700 848 km
Northway ORT 523 Civ. Paved Yes 5100 869 km

Ports

Intensity Name LOCODE Country Distance
Kodiak Wake Island 280 km
Port Hobron Wake Island 280 km
Womens Bay Wake Island 280 km
Ouzinkie Wake Island 295 km
Three Saints Bay Wake Island 297 km
Dry Spruce Bay Wake Island 319 km
Port Obrien Wake Island 320 km
Trap Point Wake Island 329 km
Port Vita Wake Island 330 km
Lazy Bay Wake Island 333 km
Larsen Bay Wake Island 343 km
Port William Wake Island 344 km
Bear Island Wake Island 345 km
Uyak Wake Island 349 km
Karluk Wake Island 370 km
Karluk Wake Island 380 km
Chirikof Island Wake Island 408 km
Homer USHOI Wake Island 420 km
Seward USSEW Wake Island 453 km
Ninilchik Wake Island 472 km
Kenai Wake Island 517 km
Nikiski USNKI Wake Island 534 km
Cordova USCDV Wake Island 538 km
Anchorage USANC Wake Island 577 km
Drift River Wake Island 536 km
Valdez Marine Terminal Wake Island 582 km
Valdez USVDZ Wake Island 588 km
Cape Constantine Wake Island 646 km
Kanakanak Wake Island 666 km

Dams

Intensity Reservoir Dam Name River Year Distance
Terror Lake Terror River 1984 300 km

More information

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