2018 Gulf of Alaska earthquake

2018 Alaska earthquake
2018 Gulf of Alaska earthquake is located in Alaska
Anchorage
Anchorage
2018 Gulf of Alaska earthquake
UTC time2018-01-23 09:31:40
ISC event611653794
USGS-ANSSComCat
Local dateJanuary 23, 2018
Local time00:31:42 Alaska Standard Time
Magnitude7.9 Mww[1]
Depth25 km (15.5 mi)
Epicenter56°02′46″N 149°04′23″W / 56.046°N 149.073°W / 56.046; -149.073
TypeStrike-slip
Areas affectedUnited States
Canada
Max. intensityMMI V (Moderate)[2]
TsunamiYes
Aftershocks564 (As of March 1, 2018)[3]
CasualtiesNone
Shakemap of the 2018 Alaska earthquake
Isoseismal map of the Alaska Earthquake in 2018 provided by the US Geological Survey

On January 23, 2018, at 00:31 AKST, an earthquake occurred in the Gulf of Alaska near Kodiak Island. The earthquake, measured at 7.9 on the Mw scale, was approximately 280 kilometers (170 mi) southeast of Kodiak and happened at a depth of 25 kilometers (16 mi).[2]

It was initially measured as a M 8.2 event, but later downgraded by the United States Geological Survey.[4] The earthquake was felt throughout most of southern Alaska, including the major cities of Anchorage and Fairbanks, and parts of neighboring British Columbia.[5][6]

The earthquake prompted tsunami warnings and advisories for Alaska, British Columbia, Washington, Oregon, California, and Hawaii. Residents in low-lying areas along the Gulf of Alaska and in British Columbia were evacuated to shelters and higher ground. The Pacific Tsunami Warning Center later cancelled most of the alerts within four hours of the earthquake, due to the apparent lack of tsunami.[4][7] The highest recorded waves after the event measured at under 8.3 inches (21 cm) above tide level on Kodiak Island.[8]

Earthquake

According to the United States Geological Survey, the earthquake occurred 175 miles (282 km) southeast of Kodiak, Alaska at 12:31 AM local time (AKST).[2] Witnesses to the earthquake itself reported that it was very long in duration, feeling like a "slow roller," but it was not a violent earthquake despite its magnitude and mercalli intensity, as its epicentre was hundreds of kilometres offshore. This was corroborated by witnesses in Anchorage.[9][7] There was no immediate damage reported.[7] The earthquake woke people in Anchorage, 350 miles (560 km) from the epicenter, and was felt as far as Fairbanks to the northeast and British Columbia to the southeast.[5][6] The earthquake's S waves arrived in Anchorage within one minute, and reached Fairbanks within three minutes.[10]

The earthquake was a strike-slip event that occurred within the Pacific plate. The epicenter was to the south of the Aleutian Trench, where the Pacific plate subducts beneath the North American plate. The region has produced twelve large earthquakes since 1900, including several megathrust earthquakes.[2][11]

Aftershocks

The first major aftershocks occurred 20 minutes after the earthquake. The strongest aftershock measured 5.5 on the moment magnitude scale, while most measured 4–5.[7][12] Within two days, the United States Geological Survey recorded over 50 aftershocks.[13] More than 560 aftershocks have been recorded well into March.

Alerts and evacuations

Communities on Kodiak Island and other coastal areas on the Gulf of Alaska and Cook Inlet were evacuated after warning sirens were activated. Hundreds gathered in local schools, which were opened as evacuation shelters, in Kodiak,[14] Seward,[6] and Homer.[15] Evacuees seeking higher ground filled local roads and the parking lots of supermarkets,[7] while locals reported large numbers of evacuees parking near a wind farm on Pillar Mountain near Kodiak.[5] An unrelated power outage at the Alaska Earthquake Center in Fairbanks caused some alerts to be delayed, while its website was overwhelmed by the number of users.[6] The National Weather Service sent emergency alerts to cell phones in Alaska, reading, "Emergency Alert. Tsunami danger on the coast. Go to high ground or move inland."[16]

The National Weather Service and Pacific Tsunami Warning Center initially issued a tsunami watch for Hawaii and the entire West Coast, but cancelled them after less than two hours.[17] In the San Francisco Bay Area, residents within three blocks of the Pacific coast and five blocks of the San Francisco Bay were warned by the city's Department of Emergency Management to be ready for evacuation.[9]

Some aspects of the warning systems in place were delayed or failed to issue a warning at all, prompting multiple reviews of the warning infrastructure.[18]

See also

References

  1. ^ ANSS: Alaska 2018 (accessed March 24, 2018).
  2. ^ a b c d ANSS. "M 7.9 – 280 km SE of Kodiak, Alaska". Comprehensive Catalog. U.S. Geological Survey. Retrieved January 23, 2018.
  3. ^ "USGS earthquake catalog". United States Geological Survey.
  4. ^ a b "Tsunami warning issued after magnitude 7.9 earthquake strikes off Alaska coast". Los Angeles Times. Associated Press. January 23, 2018. Retrieved January 23, 2018.
  5. ^ a b c Hanlon, Tegan; Hollander, Zaz; Herz, Nathaniel (January 23, 2018). "7.9 quake in Gulf of Alaska spurs tsunami alerts, evacuations". Anchorage Daily News. Retrieved January 23, 2018.
  6. ^ a b c d Hollander, Zaz; Hanlon, Tegan (January 23, 2018). "Orderly evacuations prevailed in Alaska coastal cities after 7.9 earthquake set off tsunami scare". Anchorage Daily News. Retrieved January 23, 2018.
  7. ^ a b c d e Mullany, Gerry; Ramzy, Austin; Fountain, Henry (January 23, 2018). "Alaska Earthquake Prompts Tsunami Warning". The New York Times. Retrieved January 23, 2018.
  8. ^ National Geophysical Data Center / World Data Service: NCEI/WDS Global Historical Tsunami Database. NOAA National Centers for Environmental Information. "Tsunami Event Information". NOAA National Centers for Environmental Information. doi:10.7289/V5PN93H7. Retrieved March 22, 2024.
  9. ^ a b Park, Madison; Allen, Keith (January 23, 2018). "Tsunami warning in effect after magnitude-7.9 earthquake off Alaska". CNN. Retrieved January 23, 2018.
  10. ^ "Magnitude 7.9 Offshore Kodiak". Alaska Earthquake Center. Archived from the original on January 28, 2018. Retrieved January 27, 2018.
  11. ^ "Tsunami warnings, watches from Alaska to Mexican border following Alaska earthquake". CBS News. January 23, 2018. Retrieved January 23, 2018.
  12. ^ "M 5.5 – 245 km SE of Kodiak, Alaska". United States Geological Survey. January 23, 2018. Retrieved January 23, 2018.
  13. ^ Stinson, Nicole (January 25, 2018). "Alaska struck by another earthquake after huge quake sparks tsunami warning for US coast". Sunday Express. Retrieved January 27, 2018.
  14. ^ Borden, Mitch (January 23, 2018). "Kodiak residents wake up to tsunami sirens after earthquake". KMXT. Retrieved February 24, 2018.
  15. ^ Gross, Renee (January 23, 2018). "Residents seek shelter from possible tsunami". KBBI. Retrieved January 27, 2018.
  16. ^ "Tsunami warning cancelled". KINY. January 23, 2018. Retrieved January 23, 2018.
  17. ^ "Tsunami watch canceled for Hawaii after major Alaska quake". Honolulu Star-Advertiser. January 23, 2018. Retrieved January 23, 2018.
  18. ^ Bolton, Aaron (January 26, 2018). "Officials troubleshoot hiccups in EAS after tsunami warning". KBBI. Retrieved January 27, 2018.

Read other articles:

Basri Bermanda

Basri Bermanda Anggota Dewan Perwakilan RakyatMasa jabatan1 Oktober 1997 – 30 September 1999Daerah pemilihanSumatra Barat Informasi pribadiLahir1944KebangsaanIndonesiaProfesiUlamaDikenal karena- Ketua Umum Persatuan Tarbiyah Islamiyah (PERTI)- Ketua Majelis Ulama Indonesia (MUI)Sunting kotak info • L • B Buya Kiai Haji Drs. Basri Bermanda, M.B.A. (lahir 1944)[1] adalah seorang ulama Indonesia. Ia merupakan Wakil Ketua Umum Majelis Ulama Indonesia (MUI) periode...

 

Tigranes the Great

King of Armenia from 95 to 55 BC This article is about a king of Armenia in the 1st century BC. For other historical figures with the same name (including other kings of Armenia), see Tigranes. Tigranes the GreatKing of KingsCoin of Tigranes, Antioch mint.King of ArmeniaReign95–55 BCPredecessorTigranes ISuccessorArtavasdes IIBorn140 BCDied55 BC (aged 85)BurialTigranocerta(modern-day Diyarbakır, Turkey)ConsortCleopatra of PontusIssueFour sons:ZariadresUnnamedTigranesArtavasdes IIThree daugh...

 

Calymmian

First period of the Mesoproterozoic Era Calymmian1600 – 1400 Ma Pha. Proterozoic Archean Had. Paleoglobe of the Earth at the start of the Calymmian, c. 1590 MaChronology−1600 —–−1580 —–−1560 —–−1540 —–−1520 —–−1500 —–−1480 —–−1460 —–−1440 —–−1420 —–−1400 ...

Синелобый амазон

Синелобый амазон Научная классификация Домен:ЭукариотыЦарство:ЖивотныеПодцарство:ЭуметазоиБез ранга:Двусторонне-симметричныеБез ранга:ВторичноротыеТип:ХордовыеПодтип:ПозвоночныеИнфратип:ЧелюстноротыеНадкласс:ЧетвероногиеКлада:АмниотыКлада:ЗавропсидыКласс:Пт�...

 

Shehbaz Speed

Title given to the former prime minister of Pakistan, Shehbaz Sharif This article is part of a series aboutShehbaz Sharif Early life Political career Electoral history Elections 1997 2008 2013 2018 2024 Prime Minister of Pakistan Premiership Ministry First Second International trips Negotiations with TTP Economic crisis Floods Political unrest SIFC 2023 Geneva Conference Chief Minister of Punjab Chief Ministership of Shehbaz Sharif Model Town tragedy Daanish Schools Punjab Educational Endowme...

 

Satet

Rilievo con la dea Satet, granito rosa, 82 cm (Parigi, Louvre). Satet (anche Satis o Sati[1]) è una divinità della mitologia egizia, particolarmente venerata a Elefantina, in Egitto. Si considera protettrice delle acque del Nilo; viene raffigurata come una donna con la corona dell'Alto Egitto sormontata da due corna di gazzella. Il nome ha il significato letterale di eiaculazione in correlazione con la teoria che vedeva l'annuale piena del Nilo come l'effetto dell'atto di masturbars...

UFC 163

UFC mixed martial arts event in 2013 UFC 163: Aldo vs. Korean ZombieThe poster for UFC 163: Aldo vs. Korean ZombieInformationPromotionUltimate Fighting ChampionshipDateAugust 3, 2013VenueHSBC ArenaCityRio De Janeiro, BrazilAttendance13,873[1]Buyrate180,000[2]Event chronology UFC on Fox: Johnson vs. Moraga UFC 163: Aldo vs. Korean Zombie UFC Fight Night: Shogun vs. Sonnen UFC 163: Aldo vs. Korean Zombie[3] was a mixed martial arts event held on August 3, 2013, at the HS...

 

Contea di Perry (Illinois)

Questa voce sull'argomento contee dell'Illinois è solo un abbozzo. Contribuisci a migliorarla secondo le convenzioni di Wikipedia. Contea di PerryconteaLocalizzazioneStato Stati Uniti Stato federato Illinois AmministrazioneCapoluogoPinckneyville Data di istituzione1827 TerritorioCoordinatedel capoluogo38°05′24″N 89°22′12″W / 38.09°N 89.37°W38.09; -89.37 (Contea di Perry)Coordinate: 38°05′24″N 89°22′12″W / 38.09°N 89.37�...

 

ヨハネス12世 (ローマ教皇)

ヨハネス12世 第130代 ローマ教皇 教皇就任 955年12月16日教皇離任 964年5月14日先代 アガペトゥス2世次代 レオ8世個人情報出生 937年スポレート公国（中部イタリア）スポレート死去 964年5月14日 教皇領、ローマ原国籍 スポレート公国親 父アルベリーコ2世（スポレート公）、母アルダその他のヨハネステンプレートを表示 ヨハネス12世（Ioannes XII、937年 - 964年5月14日）は、ロ...

Leeuwenhof

Official residence of the Premier of the Western Cape in South Africa LeeuwenhofLocationGardens, Cape TownCoordinates33°56′17″S 18°24′22″E / 33.938°S 18.406°E / -33.938; 18.406 Leeuwenhof is an estate in the Gardens area of Cape Town, South Africa. It is the official residence of the Premier of the Western Cape.[1] Leeuwenhof was originally a farmhouse dating to the time of the Dutch East India Company's rule of Cape Town. It includes a Slave Quarte...

 

长城航空 (宁波)

  关于其他條目說明，請見「長城航空」。 本條目存在以下問題，請協助改善本條目或在討論頁針對議題發表看法。 此條目或其章節极大或完全地依赖于某个单一的来源。 (2016年12月3日)请协助補充多方面可靠来源以改善这篇条目。致使用者：请搜索一下条目的标题（来源搜索：长城航空 (宁波) — 网页、新闻、书籍、学术、图像），以检查网络上是否存在该主题�...

 

Booker T

Booker TBooker T in 2015Nama lahirRobert Booker Tio HuffmanLahir1 Maret 1965 (umur 59)Houston, Texas, U.S.[1]PasanganLevestia Huffman ​ ​(m. 1996; c. 2001)​ Sharmell ​(m. 2005)​Anak3KeluargaStevie Ray (brother)Karier gulat profesionalNama ringBlack Snow[2]Booker[3][4]Booker T[5]King Booker[6]G.I. Bro[3]Kole[3][4]Tinggi6 ft 3 in (19...

قانون نقل المواد الخطرة

هذه المقالة يتيمة إذ تصل إليها مقالات أخرى قليلة جدًا. فضلًا، ساعد بإضافة وصلة إليها في مقالات متعلقة بها. (يوليو 2020) قانون نقل المواد الخطرةمعلومات عامةالبداية 30 سبتمبر 1957[1][2] جانب من جوانب نقل بري الاسم الرسمي Accord européen relatif au transport international des marchandises Dangereuses par Route (بال�...

 

التجريدة الإنجليزية المصرية على دارفور

التجريدة الإنجليزية المصرية على دارفور جزء من الحرب العالمية الأولى دارفور كولاية في السودان عام 1912. معلومات عامة التاريخ 16 مارس– 6 نوفمبر 1916 البلد السودان الموقع سلطنة دارفور، الآن جزء من السودان13°N 25°E / 13°N 25°E / 13; 25   تغييراتحدودية ضم سلطنة دارفور إلى السو...

 

Arezzo (provins)

Provincia di Arezzo Provins Palazzo della Provincia Flagga Symbol Land  Italien Region Toscana Kommuner 36 Huvudort Arezzo Area 3 232,99 km²[1] Folkmängd 341 657 (2019)[2] Befolkningstäthet 106 invånare/km² Grundad 1860 Tidszon CET (UTC+1)  - sommartid CEST (UTC+2) Postnummer 52100 och 52010–52048 Riktnummer 055 och 0575 ISTAT-kod 051 Geonames 3182882 Registreringsskylt AR Karta över Italien med Provincia di Arezzo markerat Karta över ...

Rachel Fuller

British musician (born 1973) For the aircraft accident victim, see American Airlines Flight 1420. Rachel FullerBackground informationBorn (1973-07-24) 24 July 1973 (age 51)Ipswich, EnglandGenresRock, popOccupation(s)Singer-songwriter, musician, composerInstrument(s)Vocals, pianoLabelsVariousSpouse(s) Pete Townshend ​(m. 2016)​Websitemyspace.com/rachelintheatticMusical artist Rachel Fuller (born 24 July 1973) is a British musician. She is a pop music artist, a...

 

Douglas Clifton Brown, 1st Viscount Ruffside

British politician (1879–1958) Colonel The Right HonourableThe Viscount RuffsidePC JP DLClifton Brown in 1925Speaker of the House of Commonsof the United KingdomIn office3 March 1943 – 31 October 1951MonarchGeorge VIPrime MinisterWinston ChurchillClement AttleePreceded byEdward FitzRoySucceeded byWilliam MorrisonMember of Parliamentfor HexhamIn office14 December 1918 – 16 November 1923Preceded byRichard Durning HoltSucceeded byVictor FinneyIn office29 October 1...

 

Coppa del Mondo di rugby 2003

Coppa del Mondo di rugby 20032003 Rugby World Cup Logo della competizione Competizione Coppa del Mondo di rugby Sport Rugby a 15 Edizione 5ª Organizzatore World Rugby e Rugby Australia[1] Date dal 10 ottobre 2003al 22 novembre 2003 Luogo Australia Partecipanti 20 (80 alle qualificazioni) Formula fase a gironi + play-off Sede finale Accor Stadium (Sydney) Direttore Matt Carroll Risultati Vincitore Inghilterra(1º titolo) Finalista Australia Terzo Nuova Zelanda Stati...

Meranti Utara, Pintu Pohan Meranti, Toba

Meranti UtaraDesaPeta lokasi Desa Meranti UtaraNegara IndonesiaProvinsiSumatera UtaraKabupatenTobaKecamatanPintu Pohan MerantiKode pos22384Kode Kemendagri12.12.05.2001 Luas53,84 km²Jumlah penduduk1.670 jiwa (2015)Kepadatan31,02 jiwa/km² Meranti Utara adalah salah satu desa di Kecamatan Pintu Pohan Meranti, Kabupaten Toba, Provinsi Sumatera Utara, Indonesia. Desa Meranti Utara ini merupakan desa terluar dari Kabupaten Toba dan berbatasan langsung dengan wilayah Kabupaten Asahan. Pemerin...

 

Sosong-guyok

Guyŏk of Pyongyang in P'yŏngyang-Chikhalsi, North KoreaSŏsŏng-guyŏk 서성구역Guyŏk of PyongyangKorean transcription(s) • Hanja西城區域 • McCune-ReischauerSŏsŏng-guyŏk • Revised RomanizationSeoseong-guyeokLocation of Sosong-guyok within PyongyangCoordinates: 39°03′40″N 125°44′40″E / 39.06111°N 125.74444°E / 39.06111; 125.74444CountryNorth KoreaDirect-administered cityP'yŏngyang-ChikhalsiArea •&...