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Originally posted by Abney
Taiwan is getting hit with smaller waves than expected.
That's good news that the Tsunamis might not be as powerful.
THIS MESSAGE KEEPS THE ADVISORY AND WARNING AREAS THE SAME AND ADDS MORE TSUNAMI OBSERVATIONS.
The Tsunami Warning continues in effect for the coastal areas of California and Oregon from Point Concepcion, California to the Oregon-Washington border.
The Tsunami Warning continues in effect for the coastal areas of Alaska from Amchitka Pass, Alaska (125 miles W of Adak) to Attu, Alaska.
The Tsunami Advisory continues in effect for the coastal areas of California from the California-Mexico border to Point Concepcion, California.
The Tsunami Advisory continues in effect for the coastal areas of Washington, British Columbia and Alaska from the Oregon-Washington border to Amchitka Pass, Alaska (125 miles W of Adak).
A Tsunami Warning means that all coastal residents in the warning area who are near the beach or in low-lying regions should move immediately inland to higher ground and away from all harbors and inlets including those sheltered directly from the sea. Those feeling the earth shake, seeing unusual wave action, or the water level rising or receding may have only a few minutes before the tsunami arrival and should move immediately. Homes and small buildings are not designed to withstand tsunami impacts. Do not stay in these structures.
All residents within the warned area should be alert for instructions broadcast from their local civil authorities. A tsunami has been recorded.
A Tsunami Advisory means that a tsunami capable of producing strong currents or waves dangerous to persons in or very near the water is expected. Significant, widespread inundation is not expected for areas under an advisory. Currents may be hazardous to swimmers, boats, and coastal structures and may continue for several hours after the initial wave arrival.
At 9:46 PM Pacific Standard Time on March 10, an earthquake with preliminary magnitude 8.9 occurred near the east coast of Honshu, Japan . (Refer to the United States Geological Survey for official earthquake parameters.) This earthquake has generated a tsunami which could cause damage to coastal regions in a warning or advisory. The waves are expected to first reach Shemya, Alaska at 12:13 AM AKST on March 11. Estimated tsunami arrival times and maps along with safety rules and other information can be found on the WCATWC web site.
Measurements or reports of tsunami activity:
Location Lat. Lon. Time Amplitude ------------------------ ----- ------ ------- -----------
Tosashimizu Japan 32.8N 132.9E 0747UTC 00.9FT/00.27M
Tokai Japan 33.8N 137.6E 0645UTC 00.8FT/00.25M
Ofunato Japan 39.0N 141.8E 0605UTC 10.8FT/03.29M
Hanasaki Japan 43.3N 145.6E 0643UTC 09.3FT/02.82M
Boso Japan 34.8N 140.8E 0609UTC 02.6FT/00.78M
Minamitorishima Japan 24.3N 154.0E 0747UTC 01.5FT/00.45M
Naha Japan 26.2N 127.7E 0902UTC 00.7FT/00.20M
Time - Time of measurement.
Amp. - Tsunami amplitudes are measured relative to normal sea level. It is NOT crest-to-trough wave height. Values are given in both meters (M) and feet (FT).
TSUNAMI AMPLITUDES ARE EXPECTED TO PEAK TWO TO THREE HOURS AFTER INITIAL ARRIVAL ALONG THE NORTH AMERICAN COAST.
Tsunamis can be dangerous waves that are not survivable. Wave heights are amplified by irregular shoreline and are difficult to forecast. Tsunamis often appear as a strong surge and may be preceded by a receding water level. Mariners in water deeper than 600 feet should not be affected by a tsunami. Wave heights will increase rapidly as water shallows. Tsunamis are a series of ocean waves which can be dangerous for several hours after the initial wave arrival. DO NOT return to evacuated areas until an all clear is given by local civil authorities.
Pacific coastal regions outside California, Oregon, Washington, British Columbia, and Alaska should refer to the Pacific Tsunami Warning Center messages for information on the event.
This message will be updated in 60 minutes or sooner if the situation warrants. The tsunami message will remain in effect until further notice. For further information stay tuned to NOAA Weather Radio, your local TV or radio stations, or see the WCATWC web site.
Link to Standard Warning Message
Link to Public Warning Message
Link to XML/CAP Message
Link to Printable Message
Originally posted by westcoast
reply to post by berkeleygal
Also, I just heard that ocean bouys are showing one meter rise, which is apparantly very significant of a large wave.
SEATTLE-- The National Weather Service has issued a Tsunami Advisory for the coastal areas of Washington after a magnitude 8.9 earthquake struck Japan.
Waves of a half to one foot are expected to hit the Washington coast around 7 a.m. Friday.
A Tsunami Advisory means that a tsunami capable of producing strong currents or waves dangerous to persons in or very near the water is expected. Significant widespread inundation is not expected for areas under an advisory. Currents may be hazardous to swimmers, boats, and coastal structures and may continue for several hours after the initial wave arrival.
Oregon, California and Alaska are under a Tsunami Warning.
A Tsunami Warning means that a tsunami with significant widespread inundation is imminent or expected. Warnings indicate that widespread dangerous coastal flooding accompanied by powerful currents is possible and may continue for several hours after the initial wave arrival.
Early predictions from a seismologist with the Pacific Northwest Seismic Network indicate a wave of less than three feet could hit the Oregon coast.
Tsunami sirens are sounding in Hawaii right now.
The estimated earliest arrival of the first tsunami wave for Hawaii is 2:59 a.m. HST Friday.
KIRO 7 Eyewitness News has multiple crews dedicated to this breaking story. Watch live coverage from 4:30 to 7 a.m.
Originally posted by Silverado292
reply to post by westcoast
Good job Westcoast, you're a busy woman tonight. I'm wondering if the Tsunami damage could be similar to what struck Japan from the Cascadia quake that was talked about in one of your threads? en.wikipedia.org...edit on 11-3-2011 by Silverado292 because: Why ask why?
The 1700 Cascadia earthquake was a magnitude 8.7 to 9.2 megathrust earthquake that occurred in the Cascadia subduction zone in 1700.[
The earthquake caused a tsunami that struck the coast of Japan, and may also be linked to the Bonneville slide
The evidence suggests that it took place at about 9 p.m. on January 26, 1700 (NS). Although there were no written records in the region at the time, the earthquake's precise time is nevertheless known from Japanese records of a tsunami that has not been tied to any other Pacific Rim earthquake.
The geological record reveals that "great earthquakes" (those with moment magnitude 8 or higher) occur in the Cascadia subduction zone about every 500 years on average, often accompanied by tsunamis.
As the subduction zone ruptured in a magnitude 9 earthquake, it generated a strong tsunami. The shaking lasted for four minutes or more, triggering landslides. Then the tsunami would have hit land, destroying coast structures and vegetation. This was probably the strongest earthquake to strike the Contiguous United States in recorded history.
As seen in the 1700 quake and the 2004 Indian Ocean Earthquake, subduction zone earthquakes can cause large tsunamis, and many coastal areas in the region have prepared tsunami evacuation plans in anticipation of a possible future Cascadia earthquake. However, the major nearby cities, notably Seattle, Portland, Vancouver, Victoria, and Tacoma, which are located on inland waterways rather than on the coast, would be sheltered from the full brunt of a tsunami. These cities do have many vulnerable structures, especially bridges and unreinforced brick buildings; consequently, most of the damage to the cities would probably be from the earthquake itself. One expert asserts that buildings in Seattle are vastly inadequate even to withstand an earthquake of the size of San Francisco 1906, much less the much greater one that may well occur
Originally posted by St Udio
looking at the MAP you linked in the OP... the Washington state area has a lot
of yellow markers on its coast...
if i recall correctly... in the neolithic times there was a tremendous tsunami that hit
there and demolished forests to somethhing like 30 miles inland,
should we prepare for a repeat ?
9 hours time delay could see a lot of evacuation..if they got mobilized
Moclips: 3.3 feet Long Beach: 1.3 feet Westport: 1.3 feet Neah Bay: 1.1 feet Bellingham: 0.9 feet Port Angeles: 0.8 feet
Clatsop Spit: 4.5 feet Cannon Beach: 3.7 feet Oceanside: 3.3 feet