It was stated that increased solar activity could be causing earthquakes by heating the earth's core and expanding the earth's crust. (This could be
exacerbated by passing comets amplifying the effects of the sun.) Conjecture was that when the core cooled, that the crust might create pressure to
return to its former condition. This could either continue to provide stress on Japan or might cause stress along other areas of the ring of fire.
Here is information on the Japan quake:
www.earthtimes.org...
"Tectonic plates are the segmented blocks of the earth's outer crust upon which the oceans and continents lie. The oceanic crust is much thinner than
the continental/terrestrial crust. There are 9 major plates with a number of minor ones. The Giant Pacific Plate is almost entirely ocean based while
the North American plate is largely continently. Irrespective of size all plates have the potential to cause crustal unrest leading to earthquakes and
volcanic eruptions.
"According to the US Geological Society, Japan's EQ occurred as a result of thrust faulting on or near the subduction zone interface plate boundary
between the Pacific and North American plates. The Pacific plate thrusts underneath Japan at the Japan Trench, and dips to the west beneath Eurasia.
On March 11th 2011 the plate boundary subduction caused Japan's most catastrophic EQ."
www.bellinghamherald.com...
The 9.0 earthquake that struck off the northeast coast of Japan is similar to one that hit off Washington's coast in 1700. That type of megathrust
quake tends to occur every 300 to 500 years, meaning we're inside the window.
"Every year there is a 1 in 500 chance we'll get that earthquake," said John Vidale, state seismologist and director of the Pacific Northwest Seismic
Network. "That's probably our biggest regional danger."
Here is a model of what the sea bottom looks like at the point of the epicenter:
ksjtracker.mit.edu...
"Better would have been a diagram or other photo-computerized whatever illustrating the lithospheric convulsion that spawned this mobile blister on
the sea. Up right is a vastly, vertically exaggerated map of the ocean floor off Japan, making plain what a drastic difference there is between
oceanic lithosphere and continental margin. The foreground abyssal plain is a portion of Pacific Plate that is crunching its way under that escarpment
that holds Japan and is part of interlocked crust of the Eurasian Plate. The star marks the spot on the surface beneath which, well down, the rupture
first began to rip. (source: NOAA, via UC Berkeley seismoblog where one can right click it to get the hi-res version)."
www.xnewsarchive.com...
Giant whirlpool in Japan.
"The 8.9 magnitude earthquake is among the top 10 ever recorded and occurred on an irregular fault line where a smaller temblor would be expected…
“is going to be among the top 10 earthquakes recorded since we have had seismographs,” said seismologist Susan Hough of the U.S. Geological Survey
in Pasadena. “It’s bigger than any known historic earthquake in Japan, and bigger than expectations for that area.” Geologists had expected the
portion of the Pacific “Ring of Fire” that produced this quake to yield a temblor on the order of magnitude 8 or perhaps 8.5, she said.
“Something as big as an 8.9 is a bit of a surprise,” she said. A quake that big usually requires a long, relatively straight fault line that can
rupture, such as those found in Peru and along the eastern coast of South America. Friday’s quake occurred in the Japan Trench, where the Pacific
tectonic plate slides under the Japan plate. Scientists did not expect such a big quake in the area because the plate boundary is not straight, but is
fairly irregular. According to Lucile Jones of the U.S. Geological Survey, a quake of that size would require rupturing a zone at least 300 miles
long. – LA Times.
"What was also another surprise about the earthquake was that of a giant whirlpool, that was seen near Qarai City, Ibaraki Prefecture in northeastern
Japan. A swirling vortex, that lasted for hours, sucking up everything in its path, including houses, ships, cars and farm buildings. According to
Michio Kaku, the theoretical physicist, the whirlpool was caused by the sudden uplift of the Earth’s crust, a rupture ranging for hundreds of miles
that created colliding waves. He also believes that the crack in the Earth’s crust, also caused the water to swirl into a vortex, descending and
funneling like a drain."
edit on 28-4-2011 by Dalke07 because: (no reason given)
edit on 28-4-2011 by Dalke07 because: (no reason given)