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Tsunami Warning!
Tsunami Warning!
Published: 2015/05/15
Channel: PacificTWC
Earthquakes of the First 15 Years of the 21st Century - PTWC 2DIC
Earthquakes of the First 15 Years of the 21st Century - PTWC 2DIC'16
Published: 2016/12/09
Channel: Max Henry Medina Zapata
TSUNAMI WARNING!
TSUNAMI WARNING!
Published: 2013/07/28
Channel: PacificTWC
Tsunami Forecast Model Animation: Cascadia 1700
Tsunami Forecast Model Animation: Cascadia 1700
Published: 2016/01/22
Channel: PacificTWC
BREAKING - MAJOR 7.9 Earthquake Off Pacific Ocean Triggers Tsunami Warning For Papua New Guinea
BREAKING - MAJOR 7.9 Earthquake Off Pacific Ocean Triggers Tsunami Warning For Papua New Guinea
Published: 2016/12/17
Channel: Victurus Libertas VL
Tsunami Forecast Model Animation: Japan 2011
Tsunami Forecast Model Animation: Japan 2011
Published: 2016/03/11
Channel: Great ShakeOut Earthquake Drills
Tsunami Warning - Honolulu, Hawaii
Tsunami Warning - Honolulu, Hawaii
Published: 2011/03/12
Channel: theweatherchazz
PTWC issues tsunami advisory after Chile earthquake
PTWC issues tsunami advisory after Chile earthquake
Published: 2014/04/02
Channel: KHON2 News
Tsunami Warning for Hawaii after Chile Earthquake 2/27/10
Tsunami Warning for Hawaii after Chile Earthquake 2/27/10
Published: 2010/02/27
Channel: ParagonX94
Earthquake in Pacific Prompts Tsunami Warnings
Earthquake in Pacific Prompts Tsunami Warnings
Published: 2016/12/08
Channel: Wochit News
Pacific Tsunami - 1946 & 1954
Pacific Tsunami - 1946 & 1954
Published: 2007/05/29
Channel: mcab1993
Tsunami Warning: Alaska, Hawaii, & Canada After 7.7 Earthquake Hits Canada British Columbia 10/28/12
Tsunami Warning: Alaska, Hawaii, & Canada After 7.7 Earthquake Hits Canada British Columbia 10/28/12
Published: 2012/10/28
Channel: Mr. Viral News
Tsunami Expert: a Few More Quakes to Worry About
Tsunami Expert: a Few More Quakes to Worry About
Published: 2011/03/15
Channel: Associated Press
Busy Morning At Pacific Tsunami Center
Busy Morning At Pacific Tsunami Center
Published: 2009/09/30
Channel: KITV
9pm: Updates from Pacific Tsunami Warning Center and Waikiki
9pm: Updates from Pacific Tsunami Warning Center and Waikiki
Published: 2015/09/17
Channel: KHON2 News
9pm Pacific Tsunami Warning Center interview
9pm Pacific Tsunami Warning Center interview
Published: 2015/09/17
Channel: KHON2 News
9PM- Pacific Tsunami Warning Center
9PM- Pacific Tsunami Warning Center
Published: 2012/10/28
Channel: KHON2 News
Chile earthquake triggers tsunami warning
Chile earthquake triggers tsunami warning
Published: 2016/12/25
Channel: New Channel
Strong 7 7 magnitude Canada quake prompts tsunami warning  Pacific tsunami warning center
Strong 7 7 magnitude Canada quake prompts tsunami warning Pacific tsunami warning center
Published: 2013/01/10
Channel: worldnews84
Tsunami waves spotted in Chile
Tsunami waves spotted in Chile
Published: 2015/09/17
Channel: Eagle News
Pacific Tsunami Warning Center tests new earthquake warning system
Pacific Tsunami Warning Center tests new earthquake warning system
Published: 2014/08/26
Channel: KHON2 News
4pm Tsunami Advisory update: NO major tsunami expected in Hawaii
4pm Tsunami Advisory update: NO major tsunami expected in Hawaii
Published: 2015/09/17
Channel: KHON2 News
Hawaii
Hawaii's Pacific Tsunami Warning Center
Published: 2010/03/01
Channel: T Modomo
Mega Tsunami coming to Pacific Ocean, Pacific Tsunami Warning Center
Mega Tsunami coming to Pacific Ocean, Pacific Tsunami Warning Center
Published: 2016/05/10
Channel: TBN24
Tsunami Forecast Model Animation: Chile 2010
Tsunami Forecast Model Animation: Chile 2010
Published: 2016/02/26
Channel: PacificTWC
US Pacific warning centre predicts further tsunamis
US Pacific warning centre predicts further tsunamis
Published: 2015/07/30
Channel: AP Archive
#HITsunami 10:51pm local update: Pacific Tsunami Warning Center
#HITsunami 10:51pm local update: Pacific Tsunami Warning Center's, Gerard Fryer
Published: 2012/10/28
Channel: schwuw
Tsunami warning in Hawaii forces evacuations
Tsunami warning in Hawaii forces evacuations
Published: 2012/10/28
Channel: The Telegraph
BREAKING TSUNAMI warning for Hawaii after Earthquake in Solomon Islands How do Tsunami
BREAKING TSUNAMI warning for Hawaii after Earthquake in Solomon Islands How do Tsunami's f
Published: 2017/01/14
Channel: henry breen
BREAKING: Huge 8.0 earthquake strikes near Australia || TSUNAMI WARNING
BREAKING: Huge 8.0 earthquake strikes near Australia || TSUNAMI WARNING
Published: 2016/12/08
Channel: Trump Dayz
Tsunami warning issued for Pacific Ocean
Tsunami warning issued for Pacific Ocean
Published: 2012/04/11
Channel: IBTimes UK
Tsunami Warning Center oil
Tsunami Warning Center oil
Published: 2010/12/09
Channel: oilkritika
"Let
"Let's wait and see" Pacific Tsunami Warning Center head says [11:22pm local]
Published: 2012/10/28
Channel: schwuw
Indonesia: Tsunami alert cancelled
Indonesia: Tsunami alert cancelled
Published: 2014/11/15
Channel: euronews (in English)
Australia Earthquake Tsunami Warning 8 0 Magnitude Earthquake
Australia Earthquake Tsunami Warning 8 0 Magnitude Earthquake
Published: 2013/02/06
Channel: TheNewsthatmatters1
9/16/2015 -- Large M8.3 Earthquake Strikes Chile -- Tsunami warning issued -- Pacific Unrest Obvious
9/16/2015 -- Large M8.3 Earthquake Strikes Chile -- Tsunami warning issued -- Pacific Unrest Obvious
Published: 2015/09/17
Channel: dutchsinse
4/11/2012 -- 8.7 magnitude earthquake Sumatra West Pacific = Tsunami warning
4/11/2012 -- 8.7 magnitude earthquake Sumatra West Pacific = Tsunami warning
Published: 2012/04/11
Channel: dutchsinse
No tsunami threat for Hawaii after quake hits South Pacific
No tsunami threat for Hawaii after quake hits South Pacific
Published: 2013/02/06
Channel: KHON2 News
Powerful earthquake strikes Papua New Guinea, tsunami warning issued A MAGNITUDE 8.0 earthquake
Powerful earthquake strikes Papua New Guinea, tsunami warning issued A MAGNITUDE 8.0 earthquake
Published: 2016/12/17
Channel: Tsunami Man
Tsunami Warning: Hawaii - October 28, 2012 - 7.7 Earthquake in Canada
Tsunami Warning: Hawaii - October 28, 2012 - 7.7 Earthquake in Canada
Published: 2012/10/28
Channel: Mr. Viral News
ALERT: WARNING, TSUNAMI WARNING, NUMEROUS AREAS 2 B AFFECTED!
ALERT: WARNING, TSUNAMI WARNING, NUMEROUS AREAS 2 B AFFECTED!
Published: 2016/12/08
Channel: WheepingWillow2
Japan M8.9 Earthquake - Hawaii Tsunami Warning: First Sirens
Japan M8.9 Earthquake - Hawaii Tsunami Warning: First Sirens
Published: 2011/03/11
Channel: dcabatu
9.2 Cascadia Megathrust Tsunami | Video Animation (  Tsunami Animation: Cascadia 1700     )
9.2 Cascadia Megathrust Tsunami | Video Animation ( Tsunami Animation: Cascadia 1700 )
Published: 2015/07/21
Channel: Thomas Shaughnessy
Tsunami Watch for Pacific Ocean 9/16/15
Tsunami Watch for Pacific Ocean 9/16/15
Published: 2015/09/17
Channel: MsMilkytheclown1
5.3-Magnitude Earthquake In Hawaii
5.3-Magnitude Earthquake In Hawaii
Published: 2017/06/08
Channel: Wochit News
Powerful Earthquake Strikes Off Chile Coast - Tsunami WARNING
Powerful Earthquake Strikes Off Chile Coast - Tsunami WARNING
Published: 2014/04/02
Channel: Charles Walton
TSUNAMI BULLETIN 4: EQ 8.2 Iquique Chili - HEADS UP!
TSUNAMI BULLETIN 4: EQ 8.2 Iquique Chili - HEADS UP!
Published: 2014/04/02
Channel: Pinksapphiret2
Tsunami Warning 7.7 in Hawaii from earthquake
Tsunami Warning 7.7 in Hawaii from earthquake
Published: 2012/10/28
Channel: hourlyupdates
Papua New Guinea earthquake of 8.0 magnitude, tsunami warning issued | वनइंडिया हिंदी
Papua New Guinea earthquake of 8.0 magnitude, tsunami warning issued | वनइंडिया हिंदी
Published: 2016/12/17
Channel: Oneindia Hindi | वनइंडिया हिन्दी
Papua New Guinea struck with 8.0 earthquake, Tsunami Warning sounded | Oneindia News
Papua New Guinea struck with 8.0 earthquake, Tsunami Warning sounded | Oneindia News
Published: 2016/12/17
Channel: Oneindia News
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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Tsunami warning sign
A diagram of the DART II system

The Pacific Tsunami Warning Center (PTWC) is one of two tsunami warning centers that are operated by NOAA in the United States. Headquartered on Ford Island, HI, the PTWC is part of an international tsunami warning system (TWS) program and serves as the operational center for TWS of the Pacific issuing bulletins and warnings to participating members and other nations in the Pacific Ocean area of responsibility. It is also the regional (local) warning center for the State of Hawaii. The other tsunami warning center is the National Tsunami Warning Center (NTWC) in Palmer, Alaska, serving all coastal regions of Canada and the United States except Hawaii, the Caribbean Sea and the Gulf of Mexico.

The PTWC was established in 1949, following the 1946 Aleutian Island earthquake and a tsunami that resulted in 165 casualties in Hawaii and Alaska.

The PTWC uses seismic data as its starting point, but then takes into account oceanographic data when calculating possible threats. Tide gauges in the area of the earthquake are checked to establish if a tsunami has formed. The center then forecasts the future of the tsunami, issuing warnings to at-risk areas all around the Pacific basin if needed.

Bulletins[edit]

Depending on the seismic data, PTWC will issue the following types of bulletins:

Tsunami Information Bulletin
At this time, though a threat exists, there is no evidence that a tsunami is making its way across the Pacific.
Tsunami Watch
PTWC has determined the earthquake may very likely have created a tsunami and is advising parties to be alert as PTWC awaits tide data to support tsunami generation. A watch may be upgraded to an advisory or a warning.
Tsunami Advisory
PTWC has determined the earthquake has created a tsunami with strong currents or waves dangerous to those in or very near the water.
Tsunami Warning
PTWC finds conditions serious enough to issue immediate concern to parts of the Pacific. The message will include approximate arrival times for various parts of the Pacific.

Deep-ocean tsunami detection[edit]

In 1995, NOAA began developing the Deep-ocean Assessment and Reporting of Tsunamis (DART) system. By 2001, an array of six stations had been deployed in the Pacific Ocean.[1]

Beginning in 2005, as a result of the tsunami caused by the 2004 Indian Ocean earthquake, plans were announced to add 32 more DART buoys to be operational by mid-2007.[2]

These stations give detailed information about tsunamis while they are still far off shore. Each station consists of a sea-bed bottom pressure recorder (at a depth of 1000–6000 m) which detects the passage of a tsunami and transmits the data to a surface buoy via acoustic modem. The surface buoy then radios the information to the PTWC via the GOES satellite system. The bottom pressure recorder lasts for two years while the surface buoy is replaced every year. The system has considerably improved the forecasting and warning of tsunamis in the Pacific Ocean.

Final transmission[edit]

Local populations in the United States of America receive tsunami information through radio and television receivers connected to the Emergency Alert System, and in some places (such as Hawaii) civil defense sirens and roving loudspeaker broadcasts from police vehicles. The public can subscribe to the RSS feed or email alerts from the PTWC web site,[3] and the UNESCO site.[4] Email and text messages are also available from the USGS Earthquake Notification Service[5] which includes tsunami alerts.

References[edit]

External links[edit]

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