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Chile Quake Shoved Islands Upward,

Shifted Earth's Axis, Shortened Day
 

Rising islands: I expect the pace to increase
 

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2 Mar 10 - Chile's massive magnitude 8.8 earthquake has likely altered the distribution of the Earth's overall mass, scientists from NASA say.

As a result, "the length of the day should have gotten shorter by 1.26 microseconds [millionths of a second]," said Richard Gross, a geophysicist at NASA's Jet Propulsion Laboratory. "The axis about which the Earth's mass is balanced should have moved by 2.7 milliarcseconds [about 8cm or 3 inches]."

The speed of the Earth's rotation also increased slightly, because sudden changes in the dimensions of the Earth's tectonic plates can alter the velocity.

David Kerridge, at the British Geological Survey in Edinburgh, likened the change in rotation speed to what happens when a figure skater draws her arms in close to her body while spinning. "As she pulls her arms in," said Kerridge, "she gets faster and faster. It's the same idea with the Earth going around: If you change the distribution of mass, the rotation rate changes."

Some islands may even have moved.

Santa Maria Island off the coast near Concepcion may have been raised two metres (about seven feet) as a result of the quake, said Andreas Rietbrock, a professor of Earth Sciences at Britain's Liverpool University who has studied the area impacted, though not since the latest temblor.

There is evidence that previous earthquakes have shoved the island upward in the past, said Rietbrock.

          I'm not surprised that Santa Maria Island may have moved upward.
          In fact, I expect ever more and ever stronger earthquakes as our
          magnetic field strength decreases. Here's what I said about that in
         "Not by Fire but by Ice" (p. 195)

           Earthquakes and rising land; two tectonic processes in phase with
          equinoctial precession (and ice ages).

          For proof, look at Barbados, the easternmost island in the Lesser
          Antilles in the Caribbean. Barbados is terraced. From the air, the
          terraces look like a huge flight of stairs.

          Two theories exist as to what formed the terraces. Each theory
          begins with the same premise, that the island periodically rose from
          the sea during a major earthquake. Each time it rose, the first theory
          goes, one reef died and a new one grew at a lower point on the island.
          The second theory holds that each terrace was carved from a  single
          large fossil reef. Each time the island rose, wave action sculpted a
          new terrace.    

          In 1965, Professor Robley K. Matthews of Brown University had the
          terraces dated. The lowest one dated at 82,000 years old, the second
          one dated at 103,000, and the top one dated at 122,000. The steps
          had been sculpted in sync with precession of the equinoxes. (Broecker
          et al., 1968)

          Other parts of the world also rose in sync with precession. Each terrace
          on New Guinea's Huon Peninsula, for example, formed when it abruptly
          rose above sea level during a major earthquake in sync with precession
          (Bloom, Broecker, Chappell, Matthews, and Mesolella). The Florida Keys
          also rose in sync with precession (Broecker and Thurber). So did the
          Bahamas and the Ryukyu Islands. Other rapidly rising reefs have been
          dated at 66,000 ± 4,000 years, others at 48,000 years—all in sync with
          equinoctial precession. Even the exposed beds in southern Scandinavia
          south of Göteburg, which uplifted about 10,000 years ago, rose in sync
          with precession.

          And the pace is picking up. "The rates of modern movements are
          significantly greater than the average rates over the past 130 my,"
          said Officer and Drake. "These movements may be episodic," said
          Officer, "with a cycle as short as 10,000 years." (Tectonics, 1985)

          What would make huge chunks of land halfway around the world
          from each other rise in phase with equinoctial precession?

          Electromagnetic forces—unleashed by magnetic reversals.

See entire article:
http://www.smh.com.au/technology/sci-tech/chilean-quake-shifted-earths-axis-nasa-scientist -20100302-peqe.html
Thanks to David Bronzich and Robyn Richards in Sydney, Australia for this link

 

 
 



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