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The March 11, magnitude 9.0 earthquake in Japan may have shortened the length of each Earth day and shifted its axis. But don't worry—you won't notice the difference. Using a United States Geological Survey estimate for how the fault responsible for the earthquake slipped, research scientist Richard Gross of NASA's Jet Propulsion Laboratory, Pasadena, Calif., applied a complex model to perform a preliminary theoretical calculation of how the Japan earthquake—the fifth largest since 1900—affected Earth's rotation. His calculations indicate that by changing the distribution of Earth's mass, the Japanese earthquake should have caused Earth to rotate a bit faster, shortening the length of the day by about 1.8 microseconds (a microsecond is one millionth of a second). The calculations also show the Japan quake should have shifted the position of Earth's figure axis (the axis about which Earth's mass is balanced) by about 17 centimeters (6.5 inches), towards 133 degrees east longitude. Earth's figure axis should not be confused with its north-south axis; they are offset by about 10 meters (about 33 feet). This shift in Earth's figure axis will cause Earth to wobble a bit differently as it rotates, but it will not cause a shift of Earth's axis in space—only external forces such as the gravitational attraction of the sun, moon and planets can do that. Both calculations will likely change as data on the quake are further refined. In comparison, following last year's magnitude 8.8 earthquake in Chile, Gross estimated the Chile quake should have shortened the length of day by about 1.26 microseconds and shifted Earth's figure axis by about 8 centimeters (3 inches). A similar calculation performed after the 2004 magnitude 9.1 Sumatran earthquake revealed it should have shortened the length of day by 6.8 microseconds and shifted Earth's figure axis by about 7 centimeters, or 2.76 inches. How an individual earthquake affects Earth's rotation depends on its size (magnitude), location and the details of how the fault slipped. Gross said that, in theory, anything that redistributes Earth's mass will change Earth's rotation. "Earth's rotation changes all the time as a result of not only earthquakes, but also the much larger effects of changes in atmospheric winds and oceanic currents," he said. "Over the course of a year, the length of the day increases and decreases by about a millisecond, or about 550 times larger than the change caused by the Japanese earthquake. The position of Earth's figure axis also changes all the time, by about 1 meter (3.3 feet) over the course of a year, or about six times more than the change that should have been caused by the Japan quake." Gross said that while we can measure the effects of the atmosphere and ocean on Earth's rotation, the effects of earthquakes, at least up until now, have been too small to measure. The computed change in the length of day caused by earthquakes is much smaller than the accuracy with which scientists can currently measure changes in the length of the day. However, since the position of the figure axis can be measured to an accuracy of about 5 centimeters (2 inches), the estimated 17-centimeter shift in the figure axis from the Japan quake may actually be large enough to observe if scientists can adequately remove the larger effects of the atmosphere and ocean from the Earth rotation measurements. He and other scientists will be investigating this as more data become available. Gross said the changes in Earth's rotation and figure axis caused by earthquakes should not have any impacts on our daily lives. "These changes in Earth's rotation are perfectly natural and happen all the time," he said. "People shouldn't worry
Originally posted by CrypticSouthpaw
reply to post by beautyofperil
Did you know, that if we did not have that earthquake in Japan, we would of not been tilted slightly off axis and that Asteroid would of hit us. True story. Sorry Japan, but we had to microwave you. For the good of the colony.
Can't hide the truth
Originally posted by Pauligirl
Originally posted by CrypticSouthpaw
reply to post by beautyofperil
Did you know, that if we did not have that earthquake in Japan, we would of not been tilted slightly off axis and that Asteroid would of hit us. True story. Sorry Japan, but we had to microwave you. For the good of the colony.
Can't hide the truth
Can you explain that a little more? Since 2012 DA14 passed more than 17,200 miles from earth, how did that tiny twist from the earthquake save us?
Or just tell me if I’m not recognizing sarcasm here. I just can’t tell anymore.
Originally posted by Phage
reply to post by beautyofperil
No you didn't. You said other astronomers watched it pass. You didn't say that it was other astronomers who discovered it and calculated its orbit.
You also said to ignore the fact that it was being observed by independent astronomers. In fact you ignore the fact that your little story makes no sense at all.
edit on 2/16/2013 by Phage because: (no reason given)
High-altitude nuclear explosions (HANE) have historically been nuclear explosions which take place above altitudes of 30 km, still inside the Earth's atmosphere. Such explosions have been tests of nuclear weapons, used to determine the effects of the blast and radiation in the exoatmospheric environment. The highest was at an altitude of 540 km (335.5 mi). The only nations to detonate nuclear weapons in outer space are the United States and the Soviet Union. The U.S. program began in 1958 with the Hardtack Teak and Hardtack Orange shots, both 3.8 megatons. These warheads were initially carried on Redstone rockets. Later tests were delivered by Thor missiles for Operation Dominic I tests, and modified Lockheed X-17 missiles for the Argus tests. The purpose of the shots was to determine both feasibility of nuclear weapons as an anti-ballistic missile defense, as well as a means to defeat satellites and manned orbiting vehicles in space. High-altitude nuclear blasts produce significantly different effects. In the lower reaches of vacuous space, the resulting fireball grows much larger and faster than it does near the ground, and the radiation it emits travels much farther.
Originally posted by karen61560
reply to post by SilentKoala
Who trys to create panic every day? Some folks on ATS for sure but Govts? Name one panic situation that they create and support.
Originally posted by colin42
reply to post by beautyofperil
The problem with blowing up a rock of this size is that breaking it up Armageddon style would be you could not guarantee you could break into small harmless chunks and could in fact cause more danger and damage.
Originally posted by Phage
The asteroid was first seen last year at an observatory in Spain. It was seen by other observatories after it was reported and an orbit was calculated.
It was "recovered" in January by several different observatories and the orbit refined.
There is no "they" who could have concealed anything about it. It was observed by international and independent astronomers. NASA really had nothing to do with it.
edit on 2/16/2013 by Phage because: (no reason given)
Originally posted by bloodreviara
I doubt its true but what the hey lets say it is, now these governments
all consist of one thing, egotistical men/women, your telling me they
saved the world and AREN'T going to claim every bit of credit they
could lol, heck there would be a war over who got credit..... it just
wouldn't happen until they actually won, but if your idea were correct
we would be in awe of our fearless leaders devotion to our planet right
about now.....edit on 17-2-2013 by bloodreviara because: (no reason given)
Originally posted by derfreebie
Originally posted by bloodreviara
I doubt its true but what the hey lets say it is, now these governments
all consist of one thing, egotistical men/women, your telling me they
saved the world and AREN'T going to claim every bit of credit they
could lol, heck there would be a war over who got credit..... it just
wouldn't happen until they actually won, but if your idea were correct
we would be in awe of our fearless leaders devotion to our planet right
about now.....edit on 17-2-2013 by bloodreviara because: (no reason given)
Amen, and your star. I find it impossible to believe that any thing the
governmnet does for our benefit whether benign or noble, isn't milked for
every bit of airplay and consequent support it can get. Have you any
verification, folks, of the government doing something good for us that
didn't come with trumpets, a rainbow sound stage, and unsalted butter?
forgive the man he didn't do his homework :p Yes they were aware of this Asteroid haha and its path has been known since last year everything he says checks up. The only time the gov would actually intend on hiding something is when many lives were at risk or are terminated. This asteroid was a near miss. Its not gunna be around till 2080 again. But that still leaves me to wonder. If selected earthquakes are being created to avert asteroids we spot? If not already, If the earth did have an asteroid big enough to cause extinction Would the governments of this world use this technology without informing the said target areas because they would obviously not be happy about being the ants under the magnifying glass. Would a couple meters axis change enough to divert an oncoming object a year? two years? five years ahead of time? If we had to make a choice life or death. Would we do the unethical? For the better of living. lol.
Also i wanted to add. That nukes don't work in space lol. So the blowing up the asteroid theory may not work. Would have to be like a thermal detonation or something. Space is a perfect vacuum and it would rip a nuke apart atom by atom. And even if you could get it to blow up in space. The nuke would be to close to the planet in order to detonate.
So nukes to blow up Asteroids, not really viable. So maybe the north korean and said current events are just to distract people not more or less scare them. Well. They might want to scare them into supporting a war against north korea. Which The Us will use a base located in russia there was a thread about it black zone in russia. Us wants to use it as an outpost against north korea.