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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
Interview with Pacific Tsunami Warning Center
Interview with Pacific Tsunami Warning Center
Published: 2017/09/08
Channel: KHON2 News
PTWC: NO tsunami threat to Hawaii after M8.1 earthquake off Mexico
PTWC: NO tsunami threat to Hawaii after M8.1 earthquake off Mexico
Published: 2017/09/08
Channel: KHON2 News
Pacific Tsunami - 1946 & 1954
Pacific Tsunami - 1946 & 1954
Published: 2007/05/29
Channel: mcab1993
TSUNAMI WARNING!
TSUNAMI WARNING!
Published: 2013/07/28
Channel: PacificTWC
Tsunami Forecast Model Animation: Chile 2010
Tsunami Forecast Model Animation: Chile 2010
Published: 2016/02/26
Channel: PacificTWC
Tsunami Warning - Honolulu, Hawaii
Tsunami Warning - Honolulu, Hawaii
Published: 2011/03/12
Channel: theweatherchazz
Tsunami Forecast Model Animation: Japan 2011
Tsunami Forecast Model Animation: Japan 2011
Published: 2016/03/04
Channel: PacificTWC
9PM- Pacific Tsunami Warning Center
9PM- Pacific Tsunami Warning Center
Published: 2012/10/28
Channel: KHON2 News
Thrust vs. Strike-Slip Mechanisms in PTWC
Thrust vs. Strike-Slip Mechanisms in PTWC's Tsunami Forecast Model
Published: 2013/07/31
Channel: PacificTWC
9pm Pacific Tsunami Warning Center interview
9pm Pacific Tsunami Warning Center interview
Published: 2015/09/17
Channel: KHON2 News
Tsunami Forecast Model Animation: Cascadia 1700
Tsunami Forecast Model Animation: Cascadia 1700
Published: 2016/01/22
Channel: PacificTWC
8.0 MEGA EARTHQUAKE STRIKES MEXICO! POSSIBLE TSUNAMI
8.0 MEGA EARTHQUAKE STRIKES MEXICO! POSSIBLE TSUNAMI
Published: 2017/09/08
Channel: James Munder
HAWAII TSUNAMI WARNING / CNN show why islands were in danger after Chile Earthquake
HAWAII TSUNAMI WARNING / CNN show why islands were in danger after Chile Earthquake
Published: 2010/02/27
Channel: tvsearchparty
Tsunami Warning in India 2017
Tsunami Warning in India 2017
Published: 2017/09/25
Channel: Tech Tech Masters
DSA Pacific Tsunami Warning Center 5-2-2011
DSA Pacific Tsunami Warning Center 5-2-2011
Published: 2011/05/03
Channel: Randall Noguchi
Tsunamis in Hawaii
Tsunamis in Hawaii
Published: 2017/09/12
Channel: ThinkTech Hawaii
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
#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
Powerful Earthquake Strikes Off Chile Coast - Tsunami WARNING
Powerful Earthquake Strikes Off Chile Coast - Tsunami WARNING
Published: 2014/04/02
Channel: Charles Walton
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
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
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
Tsunami warning issued for Pacific Ocean
Tsunami warning issued for Pacific Ocean
Published: 2012/04/11
Channel: IBTimes UK
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
Busy Morning At Pacific Tsunami Center
Busy Morning At Pacific Tsunami Center
Published: 2009/09/30
Channel: KITV
Tsunami waves in New Caledonia,Vanuata,Australia after 7.0 Earthquake
Tsunami waves in New Caledonia,Vanuata,Australia after 7.0 Earthquake
Published: 2017/11/20
Channel: RAW Videos
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: 2012/10/28
Channel: NewsAndOffersNow
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
Scientists at the Pacific Tsunami Warning Center in Hawaii continue to monitor aftershocks and warn
Scientists at the Pacific Tsunami Warning Center in Hawaii continue to monitor aftershocks and warn
Published: 2015/07/31
Channel: AP Archive
Hawaii
Hawaii's Pacific Tsunami Warning Center
Published: 2010/03/01
Channel: T Modomo
"Let
"Let's wait and see" Pacific Tsunami Warning Center head says [11:22pm local]
Published: 2012/10/28
Channel: schwuw
Earthquake in Pacific Prompts Tsunami Warnings
Earthquake in Pacific Prompts Tsunami Warnings
Published: 2016/12/08
Channel: Wochit News
Solomon, Islands earthquake 7.7 magnitude; Tsunami warning | Oneindia News
Solomon, Islands earthquake 7.7 magnitude; Tsunami warning | Oneindia News
Published: 2016/12/09
Channel: Oneindia News
Protecting the Pacific
Protecting the Pacific
Published: 2016/12/07
Channel: ThinkTech Hawaii
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
Tsunami Warning Center oil
Tsunami Warning Center oil
Published: 2010/12/09
Channel: oilkritika
US Pacific warning centre predicts further tsunamis
US Pacific warning centre predicts further tsunamis
Published: 2015/07/30
Channel: AP Archive
ALERT! FIJI 7.2 EQ Tsunami Warning Issued
ALERT! FIJI 7.2 EQ Tsunami Warning Issued
Published: 2017/01/03
Channel: #Civil Disturbia
What will Happen December, 20178.3 EARTHQUAKE,CHILE, PACIFIC TSUNAMI WARNING.
What will Happen December, 20178.3 EARTHQUAKE,CHILE, PACIFIC TSUNAMI WARNING.
Published: 2017/12/02
Channel: MarilynMendoza
Warning center estimates fall short
Warning center estimates fall short
Published: 2012/10/29
Channel: KITV
Earthquakes NOAA terremotos
Earthquakes NOAA terremotos
Published: 2017/01/25
Channel: Ciencia Pirata
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
Honolulu, Hawaii Tsunami Sirens Sound
Honolulu, Hawaii Tsunami Sirens Sound
Published: 2010/02/27
Channel: Jay Metzger
Chile Earthquake tsunami warning issued .  28th 2nd 2010.
Chile Earthquake tsunami warning issued . 28th 2nd 2010.
Published: 2010/02/27
Channel: dumbbell33
Australia Earthquake Tsunami Warning 8.0 Magnitude Earthquake Near Australia Solomon Islands
Australia Earthquake Tsunami Warning 8.0 Magnitude Earthquake Near Australia Solomon Islands
Published: 2013/02/06
Channel: keepinguuptodate
First images of the South Pacific tsunami in Solomon Islands
First images of the South Pacific tsunami in Solomon Islands
Published: 2013/02/06
Channel: Diego Oliveira
7.7 Earthquake Strikes Off Solomon Islands Tsunami Warnings Hawaii- Papa New Guinea
7.7 Earthquake Strikes Off Solomon Islands Tsunami Warnings Hawaii- Papa New Guinea
Published: 2016/12/08
Channel: James Munder
British Columbia ~Tsunami Warning Issued
British Columbia ~Tsunami Warning Issued
Published: 2013/01/05
Channel: NWOIS666
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WIKIPEDIA ARTICLE

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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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