Axis Shift

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Earthquake Caused Shift in Earth’s Axis
March 13, 2011 8:01 PM
By Laura Phillips
Earthquake - earthnasa
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The 8.9 magnitude earthquake that hit Japan on Friday and caused hundreds of aftershocks and a tsunami affected other global phenomena as well, including a shift in the Earth’s axis, the length of Earth’s day and the positioning of certain countries.

Geophysicist Richard Gross of NASA's Jet Propulsion Laboratory in California, estimated that the Japanese earthquake shortened the Earth's day by 1.8 microseconds.

The loss of the microseconds is not likely to cause a time change, but will eventually mark a difference in the passing of the seasons. The change will only be observable using precise satellite navigation systems.

Gross also reported that Earth’s axis most likely shifted about 6.5 inches. The shift would affect how the planet rotates, but not its position or movement in space.
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The entire country of Japan has physically moved approximately 8 feet according to the U.S. Geological Survey, and other scientists are estimating that some parts may have moved as much as 12 feet closer to North America.

Zero affect. The International Terrestrial Reference Frame XX (ITRFxx) is based on the CIO - the Conventional International Origin which is the aprox. center of the spiral movement of the Chandler Motion - the wandering of the poles. (Discovered by an American amateur astronomer in the 1890s.) The diameter of the spiral is aprox. 100 meters and each day the instantaneous axis of rotation varies about one degree from the previous location. The spiral almost completes one rotation per year.

Weekly reports are generated and emailed to anyone interested by both the U.S. Naval Observatory as well as the Bureau de L'Heur in Paris.

This wandering is immaterial to astronomic azimuths determined to ordinary surveying specifications and even third-order surveys. Azimuth determinations of second-order accuracy and better have to take this into account for latitudes within the Continental United States (CONUS).

Probably just corrected the shift from the Indonesian earthquake; random errors tend to be compensating.

Thank You Donald.
🙂

Ralph

Didn't TDD warn of this months ago?

I noticed this morning when I got up that it was still dark outside. Last week it was light outside when I got up. And I get up at 6 every morning. Coincidence? I think not. Sounds like more evidence of a conspiracy to me. I also saw some contrails this weekend. AMMO UP!

Thanks Cliff 🙂

THE EFFECT WILL BE ENORMOUS

This shift will make up for about 9 of those pesky little 0.04' errors that we have all been finding those ancient iron rods and iron pipes out of position. The errors in location of the original stones will only be accounted for about 4 times, as they are usually out of position about twice as much as the deed calls for, but that will be OK because since they aren't generally detectable with a Schoenstedt, we only find them about half as often.

Geezer

No. TDD was talking about a comet that is supposed to (tomorrow, I believe) pass close enough to the Earth to significantly tilt its axis of rotation, causing earthquakes and 400mph winds.

The shift caused by the recent earthquake is a shift in the "figure axis", not the axis of rotation. The axis of rotation didn't change. The only thing that changed was the distribution of mass in the Earth.

The usual analogy is the "ice skater" analogy. The ice skater is spinning about an axis of rotation. The ice skater's center of mass is near this axis, but not exactly on it. In effect, the center of mass is "wobbling" around the axis of rotation. As the ice skater pulls in her arms, she is basically tightening up her mass, moving her center of mass closer to her axis of rotation. Due to conservation of momentum, this causes her rotation to speed up.

Basically, that's what happened in the earthquake. Some mass "fell" down closer to the center of the Earth, changing the location of the Earth's center of mass slightly. This doesn't mean the entire Earth moved, it just means that the distribution of mass in the Earth changed. The most-noticeable effect of this is that the Earth's rotation sped up.

However, even that increase is not detectable. They're calculating the 1.8 microsecond difference. Even with the absolute best technology available, we can't even come within an order of magnitude of being able to measure that small a difference.

But just in case you still have faith in TDD's prediction, I believe it was supposed to happen on March 15... 😉

Ditto....thanks Cliff!

Back in the days of dragging chain, I never once thought about a country like Japan, moving 8 feet!

Didn't bother our surveys at all.

Keith

What

you didn't go back and "tract" all of your surveys? LOL 😉

Right

I did not do an INDEPENDENT RESURVEY where tracting was the norm.

Keith

Just imagine

if California shifted 8 feet, what would that do to those coordinates that boundaries are bound by?

Just imagine

In that case then, I might be following fence lines.

Just imagine

or chain it and forget the rest of the world.