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Pacific Tsunami Warning Center
Pacific Tsunami Warning Center
::2011/03/17::
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Pacific Tsunami Warning Center
Pacific Tsunami Warning Center
::2014/11/18::
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4/11/2012 -- 8.7 magnitude earthquake Sumatra West Pacific = Tsunami warning
4/11/2012 -- 8.7 magnitude earthquake Sumatra West Pacific = Tsunami warning
::2012/04/11::
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4
Pacific Tsunami Warning Center tests new earthquake warning system
Pacific Tsunami Warning Center tests new earthquake warning system
::2014/08/26::
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5
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
::2012/10/28::
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6
#HITsunami 10:51pm local update: Pacific Tsunami Warning Center
#HITsunami 10:51pm local update: Pacific Tsunami Warning Center's, Gerard Fryer
::2012/10/28::
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7
BREAKING: Major 8.0 Earthquake Hits Chile, TSUNAMI Warning for Pacific Coast
BREAKING: Major 8.0 Earthquake Hits Chile, TSUNAMI Warning for Pacific Coast
::2014/04/01::
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8
DSA Pacific Tsunami Warning Center 5-2-2011
DSA Pacific Tsunami Warning Center 5-2-2011
::2011/05/03::
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9
TSUNAMI WARNING!
TSUNAMI WARNING!
::2013/07/28::
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10
U.S. Pacific Tsunami Warning Center cancels tsunami watch for Indian Ocean areas
U.S. Pacific Tsunami Warning Center cancels tsunami watch for Indian Ocean areas
::2012/04/11::
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11
9PM- Pacific Tsunami Warning Center
9PM- Pacific Tsunami Warning Center
::2012/10/28::
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12
Hawaii
Hawaii's Pacific Tsunami Warning Center
::2010/02/28::
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13
U.S. Pacific Tsunami Warning Center cancels tsunami watch for Indian Ocean areas
U.S. Pacific Tsunami Warning Center cancels tsunami watch for Indian Ocean areas
::2012/04/11::
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14
"Let
"Let's wait and see" Pacific Tsunami Warning Center head says [11:22pm local]
::2012/10/28::
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15
Quake of Magnitude 6.8 Strikes Near Easter Island Tsunami Warning Center
Quake of Magnitude 6.8 Strikes Near Easter Island Tsunami Warning Center
::2014/10/09::
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16
7.3 Magnitude Earthquake Strikes Off Indonesia Coast, Triggers Tsunami Warning
7.3 Magnitude Earthquake Strikes Off Indonesia Coast, Triggers Tsunami Warning
::2014/11/15::
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17
Chile earthquake 2014 - Amazing VIDEOS TSUNAMI WARNING DESTROY
Chile earthquake 2014 - Amazing VIDEOS TSUNAMI WARNING DESTROY
::2014/04/02::
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18
Tsunami Warning - Honolulu, Hawaii
Tsunami Warning - Honolulu, Hawaii
::2011/03/12::
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19
Indonesia: Tsunami alert cancelled
Indonesia: Tsunami alert cancelled
::2014/11/15::
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20
Tsunami Warning for Hawaii after Chile Earthquake 2/27/10
Tsunami Warning for Hawaii after Chile Earthquake 2/27/10
::2010/02/27::
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21
Quake measuring 7.3 strikes in Indonesia, local tsunami warning issued
Quake measuring 7.3 strikes in Indonesia, local tsunami warning issued
::2014/11/14::
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22
Tsunami Warning: Hawaii - October 28, 2012 - 7.7 Earthquake in Canada
Tsunami Warning: Hawaii - October 28, 2012 - 7.7 Earthquake in Canada
::2012/10/28::
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23
tsunami warning hawaii
tsunami warning hawaii
::2012/10/28::
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24
Chile Earthquake tsunami warning issued .  28th 2nd 2010.
Chile Earthquake tsunami warning issued . 28th 2nd 2010.
::2010/02/27::
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25
Massive 7.9 Earthquake Strikes Costa Rica triggering Tsunami Warnings (Sept 5, 2012)
Massive 7.9 Earthquake Strikes Costa Rica triggering Tsunami Warnings (Sept 5, 2012)
::2012/09/05::
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26
Tsunami warning after 7.4 El Salvador quake
Tsunami warning after 7.4 El Salvador quake
::2014/10/14::
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27
Busy Morning At Pacific Tsunami Center
Busy Morning At Pacific Tsunami Center
::2009/09/30::
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28
Massive 8.8 Magnitude Hit Japan. Stay Tune on Tsunami Warning, Check Description Below
Massive 8.8 Magnitude Hit Japan. Stay Tune on Tsunami Warning, Check Description Below
::2011/03/11::
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29
ALERT HAWAII TSUNAMI WARNING
ALERT HAWAII TSUNAMI WARNING
::2012/10/28::
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30
7.3-Magnitude Quake In Eastern Indonesia, Tsunami Warning Issued
7.3-Magnitude Quake In Eastern Indonesia, Tsunami Warning Issued
::2014/11/14::
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31
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
::2010/02/27::
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32
BREAKING NEWS - Indonesia tsunami alert after quake
BREAKING NEWS - Indonesia tsunami alert after quake
::2014/11/14::
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33
7.9 earthquake hits off Philippines, tsunami warning issued -NewsX
7.9 earthquake hits off Philippines, tsunami warning issued -NewsX
::2012/08/31::
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34
Tsunami warning issued for Indonesia after undersea quake
Tsunami warning issued for Indonesia after undersea quake
::2014/11/14::
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35
Magnitude 8 2 Quake Strikes Off Coast Of Chile; Tsunami Warning In South America
Magnitude 8 2 Quake Strikes Off Coast Of Chile; Tsunami Warning In South America
::2014/04/02::
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36
BREAKING: 8.2 Earthquake Hits Chile, TSUNAMI Warning April 2, 2014
BREAKING: 8.2 Earthquake Hits Chile, TSUNAMI Warning April 2, 2014
::2014/04/02::
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37
Tsunami alert issued near Moluccas in Indonesia after 7.3-magnitude quake
Tsunami alert issued near Moluccas in Indonesia after 7.3-magnitude quake
::2014/11/14::
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38
Indonesia, India downgrade Tsunami Warnings
Indonesia, India downgrade Tsunami Warnings
::2012/04/11::
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39
Tsunami island warning. generated by 8.0 quake in South Pacific  2013
Tsunami island warning. generated by 8.0 quake in South Pacific 2013
::2013/02/06::
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40
Japan M8.9 Earthquake - Hawaii Tsunami Warning: First Sirens
Japan M8.9 Earthquake - Hawaii Tsunami Warning: First Sirens
::2011/03/11::
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41
8.0 Earthquake   SANTA CRUZ ISLANDS Tsunami Warning was issued!
8.0 Earthquake SANTA CRUZ ISLANDS Tsunami Warning was issued!
::2013/02/05::
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42
BREAKING NEWS - Indonesia tsunami alert after quake
BREAKING NEWS - Indonesia tsunami alert after quake
::2014/11/14::
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43
Approaching tsunami warning from Hawaii
Approaching tsunami warning from Hawaii
::2012/10/29::
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44
Tsunami warning in Hawaii forces evacuations
Tsunami warning in Hawaii forces evacuations
::2012/10/28::
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45
Powerful Earthquake Strikes Off Chile Coast - Tsunami WARNING
Powerful Earthquake Strikes Off Chile Coast - Tsunami WARNING
::2014/04/01::
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46
ALASKA QUAKE - NO TSUNAMI - LET
ALASKA QUAKE - NO TSUNAMI - LET'S STOP THE FEAR-PORN!
::2014/06/24::
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47
Tsunami warning raised after Magnitude 7.6 earthquake off Samar
Tsunami warning raised after Magnitude 7.6 earthquake off Samar
::2012/08/31::
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Australia Earthquake Tsunami Warning 8.0 Magnitude Earthquake Near Australia Solomon Islands
Australia Earthquake Tsunami Warning 8.0 Magnitude Earthquake Near Australia Solomon Islands
::2013/02/05::
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8.3/7.8 MAGNITUDE Earthquake Strikes Near Solomon Islands TSUNAMI WARNING
8.3/7.8 MAGNITUDE Earthquake Strikes Near Solomon Islands TSUNAMI WARNING
::2014/04/12::
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TSUNAMI WARNING ISSUED FOR HAWAII  28.10.2012
TSUNAMI WARNING ISSUED FOR HAWAII 28.10.2012
::2012/10/28::
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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 in 'Ewa Beach, Hawaii, 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 & 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. After the 2004 Indian Ocean earthquake and tsunami, PTWC has extended its warning guidance to include the Indian Ocean, Caribbean and adjacent regions until regional capability is in place for these areas. These regional systems will form a global tsunami warning system once they are in operation.

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. There are never false alarms—if the PTWC issues a tsunami warning for a particular area, the tsunami is already on its way and will hit. As it takes more time for tsunamis to travel trans-oceanic distances, the PTWC can afford to take the time to make sure of its forecasts.[citation 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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