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 Max wave realtime 0.53m  
  C2 shakemap 0      
  Country Vulnerability 0      
  INFORM_normalised 0      
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 7) . The alertlevel for this event is GREEN

Intensity Population
no people
no people
no people
no people
3200 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 2600 people
Alaska United States 92000 people
Alaska United States <1000 people
Yukon Territory Canada no 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 - 289 km
McCord Alaska United States Village - 290 km
Kodiak Alaska United States City 6300 people 293 km
Nunamiut Alaska United States Village - 306 km
Kaguyak Alaska United States Village - 310 km
Afognak Alaska United States Village - 326 km
Port O'Brien Alaska United States Village - 330 km
Port Bailey Alaska United States Village - 331 km
Port Wakefield Alaska United States Village - 341 km
Uyak Alaska United States Village - 358 km
Port William Alaska United States Village - 358 km
Ayakulik Alaska United States Village - 366 km
Portlock Alaska United States Village - 402 km
Ekwok Alaska United States Village - 412 km
Millers Landing Alaska United States Village - 442 km
Homer Alaska United States Village 3900 people 442 km
Diamond Ridge Alaska United States Village 1800 people 445 km
Kachemak Silo Alaska United States Village - 449 km
Anchor Point Alaska United States Village 1800 people 461 km
San Juan Cannery Alaska United States Village - 465 km
Port Ashton Alaska United States Village - 466 km
Latouche Alaska United States Village - 466 km
Crab Bay Alaska United States Village - 467 km
Kamishak Alaska United States Village - 475 km
Kulik Lodge Alaska United States Village - 499 km
Kasilof Village Alaska United States Village - 511 km
Cohoe Alaska United States Village 1200 people 514 km
Kalifornsky Alaska United States Village 5800 people 519 km
Soldotna Alaska United States Village 3800 people 523 km
Soldocna Alaska United States Village - 524 km
Sterling Alaska United States Village 4700 people 525 km
Kenai Alaska United States Village 6900 people 534 km
Whitshed Alaska United States Village - 540 km
Nikisnka Alaska United States Village - 549 km
Nikiski Alaska United States Village 4300 people 553 km
Nkishka No 2 Alaska United States Village - 553 km
Kustatan Alaska United States Village - 558 km
Libbyville Alaska United States Village - 578 km
Koggiung Alaska United States Village - 580 km
Kvichak Alaska United States Village - 583 km
Hallersville Alaska United States Village - 583 km
Nakeen Alaska United States Village - 586 km
Spenard Alaska United States Village - 590 km
Meshik Alaska United States Village - 605 km
John Fitzgerald Kennedy City Alaska United States Village - 613 km
Strelna Alaska United States Village - 686 km
Chokosna Alaska United States Village - 689 km
Unga Alaska United States Village - 727 km
Squaw Harbor Alaska United States Village - 728 km
Herendeen Bay Alaska United States Village - 728 km
Kashegelok Alaska United States Village - 752 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 0 292 km
Kodiak Municipal KDK 22 Civ. Paved Yes 7500 293 km
Old Harbor 17 0 297 km
Ouzinkie 17 0 307 km
Kizhuyak KZH unknown 0 312 km
Blue Fox Bay BFB unknown 0 315 km
Port Lions ORI 16 0 319 km
Sitkinak SKJ unknown 0 323 km
Kitoi Bay KKB unknown 0 324 km
Seal Bay SYB unknown 0 327 km
Danger Bay DGB unknown 0 330 km
San Juan / Uganik WSJ unknown 0 331 km
Port Bailey KPY unknown 0 331 km
Pleasant Harbor PTR unknown 0 331 km
Akhiok AKK 13 0 337 km
Moser Bay KMY unknown 0 337 km
Alitak ALZ unknown 0 339 km
Amook Bay unknown 0 340 km
Zachar Bay KZB unknown 0 341 km
West Point Village KWP unknown 0 344 km
Karluk Lake KKL 112 0 345 km
Onion Bay ONN unknown 0 346 km
Olga Bay KOY unknown 0 348 km
Uganik UGI unknown 0 348 km
Larsen Bay 23 0 352 km
Port Williams KPR unknown 0 358 km
Karluk KYK 42 0 378 km
Dog Fish Bay 3 0 407 km
Port Graham PGM 28 0 417 km
English Bay KEB 8 0 420 km
Oyster Cove 14 0 423 km
Kasitsna 2 0 424 km
Seldovia SOV 9 0 424 km
Middleton Island MDO 27 Civ. Unpaved Yes 3900 427 km
Raspberry Strait RSP unknown 0 431 km
Homer HOM 24 Civ. Paved Yes 7400 440 km
Bear Cove Farm 35 0 442 km
Glacierview Strip 488 0 448 km
Falls Bay Spb FLJ unknown 0 463 km
Anchor River Airpark 37 0 464 km
Chenega Bay 22 0 468 km
Seward SWD 7 Civ. Paved No 4200 470 km
Ninilchik NIN 84 0 482 km
Port Oceanic PRL unknown 0 484 km
Camp Point 2 0 497 km
Kulik Lake LKK 219 0 500 km
Lake Brooks 11 0 502 km
Winter's Strip 34 0 508 km
Kasilof 38 0 512 km
Skilak Blm Helistop 84 0 516 km
Kokhanok 46 0 521 km
Soldotna SXQ 33 Civ. Paved Yes 5000 522 km
Dahler Homestead 91 0 523 km
Rotor Air 61 0 524 km
Gaede 35 0 524 km
Brooks Lake BKF unknown 0 526 km
Dutch Landing Strip 91 0 527 km
Doyle Estates 15 0 528 km
Mackeys Lakes 53 0 528 km
Johnstone Point 5 0 529 km
Kenai Municipal ENA 28 Civ. Paved Yes 7500 535 km
Perry Island PYL unknown 0 536 km
Fort Jensen 73 0 537 km
South Gasline 116 0 537 km
Ugashik Bay UGB 40 0 541 km
Ugashik/new UGS 8 0 542 km
Arness Lake 38 0 544 km
Carty's Airstrip 46 0 550 km
Naknek NNK unknown 0 550 km
Iliamna ILI 57 Civ. Unpaved Yes 5000 551 km
King Salmon AKN 17 Civ. Paved Yes 8500 552 km
Merle K Mudhole Smith CDV 13 Civ. Paved Yes 7400 552 km
Drift River DRF 9 0 552 km
Pilot Point PIP 17 0 553 km
Offshore Ststems-Kenai 46 0 554 km
Big Creek BIC unknown 0 556 km
Igiugig IGG 26 0 558 km
Peterson'S Point PNF unknown 0 561 km
Egegik EGX 26 Civ. Unpaved No 3000 565 km
Bartletts 15 0 565 km
Trading Bay Production 61 0 569 km
Bartletts Bistol Bay BSZ unknown 0 574 km
Koggiung 9 0 581 km
Kvichak / Diamond J 8 0 582 km
Nakeen 15 0 586 km
Tyonek TYE 34 0 588 km
Fire Island 17 0 589 km
Point Mackenzie 22 0 598 km
Yakataga CYT 4 Civ. Unpaved No 4300 605 km
Jakes Bar 321 0 691 km
Sparrevohn AFS SVW 483 Mil. Unpaved Yes 4100 692 km
Squaw Harbor unknown 0 729 km
Mule Creek 884 0 855 km

Ports

Intensity Name LOCODE Country Distance
Port Hobron Wake Island 289 km
Kodiak Wake Island 292 km
Womens Bay Wake Island 292 km
Three Saints Bay Wake Island 305 km
Ouzinkie Wake Island 307 km
Dry Spruce Bay Wake Island 330 km
Port Obrien Wake Island 331 km
Trap Point Wake Island 336 km
Lazy Bay Wake Island 339 km
Port Vita Wake Island 342 km
Larsen Bay Wake Island 353 km
Port William Wake Island 357 km
Uyak Wake Island 358 km
Bear Island Wake Island 358 km
Karluk Wake Island 379 km
Karluk Wake Island 387 km
Chirikof Island Wake Island 409 km
Port Graham Wake Island 417 km
Seldovia Wake Island 423 km
Ola Wake Island 430 km
Homer USHOI Wake Island 435 km
Kanatak Wake Island 465 km
Crab Bay Wake Island 467 km
Seward USSEW Wake Island 468 km
Ninilchik Wake Island 487 km
Snug Harbor Wake Island 511 km
Kayak Island Wake Island 524 km
Kenai Wake Island 533 km
Ugashik Wake Island 544 km
Nikiski USNKI Wake Island 549 km
Drift River Wake Island 551 km
Pilot Point Wake Island 554 km
West Foreland USWFO Wake Island 557 km
Egegik Wake Island 566 km
Koggiung Wake Island 581 km
Tyonek USTYE Wake Island 587 km
Anchorage USANC Wake Island 592 km
Port Heiden Wake Island 604 km
Baralof Bay Wake Island 727 km

Dams

Intensity Reservoir Dam Name River Year Distance
Terror Lake Terror River 1984 311 km

More information

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