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originally posted by: TEOTWAWKIAIFF
Tsunami recorded in Alaska of 6 inches to 0.8 feet (Kodiak). Looks like the severity was low enough to not cause a true tsunami alert. USGS started deploying more buoys after Japan just for this reason... to give warning. Looks like the system works!
OBSERVATIONS OF TSUNAMI ACTIVITY - UPDATED
* Observed max tsunami height is the highest recorded water level
above the tide level up to the time of this message.
TIME OBSERVED MAX
SITE OF MEASUREMENT TSUNAMI HEIGHT
---------------------------- ---------------- --------------
Kodiak Alaska 0329 PST Jan 23 0.6ft
Seward Alaska 0331 PST Jan 23 0.4ft
Old Harbor Alaska 0338 PST Jan 23 0.7ft
Sitka Alaska 0318 PST Jan 23 0.4ft
Yakutat Alaska 0335 PST Jan 23 0.5ft
Langara BC 0330 PST Jan 23 0.4ft
The Alaska earthquake was a type that usually produces less vertical motion, which means less chance for waves to build for a tsunami. That's according to Paul Earle, a seismologist with the U.S. Geological Survey. He says the earthquake was within the Pacific plate and was a so-called "strike-slip earthquake."
On March 28, 1964, at 5:36 p.m. AST (3:36 a.m. UTC), a fault between the Pacific and North American plates ruptured near College Fjord in Prince William Sound. The epicenter of the earthquake was 12.4 mi (20 km) north of Prince William Sound, 78 miles (125 km) east of Anchorage and 40 miles (64 km) west of Valdez. The focus occurred at a depth of approximately 15.5 mi (25 km). Ocean floor shifts created large tsunamis (up to 220 feet (67 m) in height), which resulted in many of the deaths and much of the property damage. Large rockslides were also caused, resulting in great property damage. Vertical displacement of up to 38 feet (11.5 m) occurred, affecting an area of 100,000 miles² (250,000 km²) within Alaska.
The Alaska earthquake was a subduction zone (megathrust) earthquake, caused by an oceanic plate sinking under a continental plate. The fault responsible was the Aleutian Megathrust, a reverse fault caused by a compressional force. This caused much of the uneven ground which is the result of ground shifted to the opposite elevation.
originally posted by: ujustneverknow
a reply to: dianajune
I have been watching Dutch for a couple months now , He doesn't predict , he FORECASTS with data , like the weather , it's really amazing and at the same time it's common sense , lol.
pressure transfers and it does so along the plate boundaries , So according to him and that process , The West Coast of North America is next for a bigger one , his process is so interesting and an aha moment once you watch several .
He's on Youtube , just search Dutchsinse , he's also on Facebook , and all the major Social Media sites.
DEFINITELY worth some browsing !!!
Unfortunately , the "professionals" are badmouthing him , he needs support from the general public if he ever wants to be respected , and he should be .
See for yourself !