reply to post by Densha82
Yeah - there's little scientific evidence, right? It's just "biblical and Nostradamus'" predictions right?
Skeptics are in denial because the fact that 2012 could and very well possibly IS going to happen is to fearful to accept the OVERWHELMING evidence
that it's coming. Let's see, astronomers, Russian scientists, biblical, philisophical, and yes, even modern--Ivy League taught scientists are all
saying the same thing. Get over yourself - skeptics are just skeptics to BE skeptics.
Study: Earth's magnetic field is changing
Observing fluid motions in core could help scientists predict future changes
By Jeremy Hsu
The innermost part of the earth. The outer core extends from 2500 to 3500 miles below the earth's surface and is liquid metal. The inner core is the
central 500 miles and is solid metal.
Something beneath the surface is changing Earth's protective magnetic field, which may leave satellites and other space assets vulnerable to
The gradual weakening of the overall magnetic field can take hundreds and even thousands of years. But smaller, more rapid fluctuations within months
may leave satellites unprotected and catch scientists off guard, new research finds.
A new model uses satellite data from the past nine years to show how sudden fluid motions within the Earth's core can alter the magnetic envelope
around our planet. This represents the first time that researchers have been able to detect such rapid magnetic field changes taking place over just a
"There are these changes in the South Atlantic, an area where the magnetic field has the smallest envelope at one third [of what is] normal," said
Mioara Mandea, a geophysicist at the GFZ German Research Center for Geosciences in Potsdam, Germany.
Even before the newly detected changes, the South Atlantic Anomaly represented a weak spot in the magnetic field — a dent in Earth's protective
The Earth's magnetic field extends about 36,000 miles into space, generated from the spinning effect of the electrically-conductive core that acts
something like a giant electromagnet. The field creates a tear-drop shaped bubble that has constantly shielded life on Earth against much of the
high-energy radiation flowing from the sun.
The last major change in the field took place some 780,000 years ago during a magnetic reversal, although such reversals seem to occur more often on
average. A flip in the north and south poles typically involves a weakening in the magnetic field, followed by a period of rapid recovery and
reorganization of opposite polarity.
Some studies in recent years have suggested the next reversal might be imminent, but the jury is out on that question.
Measuring interactions between the magnetic field and the molten iron core 1,864 miles down has proven difficult in the past, but the constant
observations of satellites such as CHAMP and Orsted have begun to bring the picture into focus.
Mandea worked with Nils Olsen, a geophysicist at the University of Copenhagen in Denmark, to create a model of the fluid core that fits with the
magnetic field changes detected by the satellites.
However, the rapid weakening of the magnetic field in the South Atlantic Anomaly region could signal future troubles for such satellites. Radiation
storms from the sun could fry electronic equipment on satellites that suddenly lacked the protective cover of a rapidly changing magnetic field.
"For satellites, this could be a problem," Mandea told SPACE.com. "If there are magnetic storms and high-energy particles coming from the sun, the
satellites could be affected and their connections could be lost."