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Keyword: poleshift

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  • Earth’s magnetic pole is on the move, fast. And we don’t know why

    01/12/2019 9:17:53 AM PST · by shove_it · 66 replies
    News Corp Australia Network ^ | 12 Jan 2019 | Jamie Seidel
    Earth’s magnetic field is what allows us to exist. It deflects harmful radiation. It keeps our water and atmosphere in place. But now it’s acting up — and nobody knows why. Planet Earth is alive. Deep beneath its skin, its life blood — rivers of molten iron — pulse around its core. And this mobile iron is what generates the magnetic field that causes auroras — and keeps us alive. But, according to the science journal Nature, something strange is going on deep down below. It’s causing the magnetic North Pole to ‘skitter’ away from Canada, towards Siberia. “The magnetic...
  • Shifting North Magnetic Pole Forces Unprecedented Navigation Fix

    01/11/2019 9:23:46 PM PST · by artichokegrower · 99 replies
    gCaptain ^ | January 11, 2019 | Alister Doyle
    Rapid shifts in the Earth’s north magnetic pole are forcing researchers to make an unprecedented early update to a model that helps navigation by ships, planes and submarines in the Arctic, scientists said.
  • Scripps researchers discover new force driving Earth's tectonic plates

    07/06/2011 12:16:41 PM PDT · by decimon · 20 replies · 1+ views
    'Hot spots' of plume from deep Earth could propel plate motions around globeBringing fresh insight into long-standing debates about how powerful geological forces shape the planet, from earthquake ruptures to mountain formations, scientists at Scripps Institution of Oceanography at UC San Diego have identified a new mechanism driving Earth's massive tectonic plates. Scientists who study tectonic motions have known for decades that the ongoing "pull" and "push" movements of the plates are responsible for sculpting continental features around the planet. Volcanoes, for example, are generally located at areas where plates are moving apart or coming together. Scripps scientists Steve Cande...
  • Life is found in deepest layer of Earth's crust

    11/19/2010 1:25:40 PM PST · by Fractal Trader · 120 replies
    The New Scientist ^ | 18 November 2010 | Michael Marshall
    IT'S crawling with life down there. A remote expedition to the deepest layer of the Earth's oceanic crust has revealed a new ecosystem living over a kilometre beneath our feet. It is the first time that life has been found in the crust's deepest layer, and an analysis of the new biosphere suggests life could exist lower still. On a hypothetical journey to the centre of the Earth starting at the sea floor, you would travel through sediment, a layer of basalt, and then hit the gabbroic layer, which lies directly above the mantle. Drilling expeditions have reached this layer...
  • Breakthrough Achieved in Explaining Why Tectonic Plates Move the Way They Do

    07/16/2010 7:42:12 AM PDT · by decimon · 40 replies · 2+ views
    Scripps Institution of Oceanography ^ | July 15, 2010 | Unknown
    Researchers at Monash University and Scripps Institution of Oceanography identify movements of plate and plate boundaries; could substantially improve models of tectonic motionScripps Institution of Oceanography / University of California, San DiegoA team of researchers including Scripps Institution of Oceanography, UC San Diego geophysicist Dave Stegman has developed a new theory to explain the global motions of tectonic plates on the earth's surface. The new theory extends the theory of plate tectonics - a kinematic description of plate motion without reference to the forces behind it - with a dynamical theory that provides a physical explanation for both the motions...
  • Sea floor records ancient Earth

    03/23/2007 11:06:03 PM PDT · by Ernest_at_the_Beach · 66 replies · 4,679+ views
    BBC ^ | Friday, 23 March 2007, 09:09 GMT | Jonathan Fildes Science and technology reporter, BBC News
    The ancient sea floor was discovered in southwest Greenland A sliver of four-billion-year-old sea floor has offered a glimpse into the inner workings of an adolescent Earth.The baked and twisted rocks, now part of Greenland, show the earliest evidence of plate tectonics, colossal movements of the planet's outer shell. Until now, researchers were unable to say when the process, which explains how oceans and continents form, began. The unique find, described in the journal Science, shows the movements started soon after the planet formed. "Since the plate tectonic paradigm is the framework in which we interpret all modern-day geology,...
  • Amazon River Once Flowed in Opposite Direction

    10/24/2006 9:54:37 PM PDT · by SunkenCiv · 36 replies · 505+ views
    PhysOrg ^ | October 24, 2006 | University of North Carolina at Chapel Hill
    Russell Mapes, a graduate student from Grass Valley, Calif., ...explains that these sediments of eastern origin were washed down from a highland area that formed in the Cretaceous Period, between 65 million and 145 million years ago, when the South American and African tectonic plates separated and passed each other. That highland tilted the river's flow westward, sending sediment as old as 2 billion years toward the center of the continent. A relatively low ridge, called the Purus Arch, which still exists, rose in the middle of the continent, running north and south, dividing the Amazon's flow - eastward toward...
  • Ice Ages Blamed On Tilted Earth

    04/30/2006 4:35:48 PM PDT · by blam · 77 replies · 1,750+ views
    Live Science ^ | 3-30-2005
    Ice Ages Blamed on Tilted Earth By Michael Schirber LiveScience Staff Writer posted: 30 March 2005 In the past million years, the Earth experienced a major ice age about every 100,000 years. Scientists have several theories to explain this glacial cycle, but new research suggests the primary driving force is all in how the planet leans. The Earth’s rotation axis is not perpendicular to the plane in which it orbits the Sun. It's offset by 23.5 degrees. This tilt, or obliquity, explains why we have seasons and why places above the Arctic Circle have 24-hour darkness in winter and constant...
  • Earth’s magnetic field is acting up and geologists don’t know why

    01/10/2019 7:52:13 PM PST · by BenLurkin · 126 replies
    Nature ^ | 09 January 2019 | Alexandra Witze
    The magnetic pole is moving so quickly that it has forced the world’s geomagnetism experts into a rare move. On 15 January, they are set to update the World Magnetic Model, which describes the planet’s magnetic field and underlies all modern navigation, from the systems that steer ships at sea to Google Maps on smartphones. The most recent version of the model came out in 2015 and was supposed to last until 2020 — but the magnetic field is changing so rapidly that researchers have to fix the model now. The problem lies partly with the moving pole and partly...
  • 'True polar wander' may have caused ice age

    11/20/2018 5:32:39 PM PST · by BenLurkin · 34 replies
    phys.org ^ | November 19, 2018, | Rice University
    Like any spinning object, Earth is subject to centrifugal force, which tugs on the planet's fluid interior. At the equator, where this force is strongest, Earth is more than 26 miles larger in diameter than at the poles. Gordon said true polar wander may occur when dense, highly viscous bumps of mantle build up at latitudes away from the equator. If the mantle anomalies are massive enough, they can unbalance the planet, and the equator will gradually shift to bring the excess mass closer to the equator. The planet still spins once every 24 hours and true polar wander does...
  • Potato Earth: Gravity satellite reveals what our planet REALLY looks like

    03/31/2011 5:40:51 PM PDT · by Free ThinkerNY · 48 replies
    dailymail.co.uk ^ | March 31, 2011 | Daily Mail Reporter
    At first glance it looks like a potato-shaped asteroid flying through space. But this multi-coloured image is actually the Earth - and shows how gravity varies on different parts of the globe. The images were unveiled today by the team behind the GOCE satellite at a conference in Munich and are the most accurate ever released. The 'geoid' map, as it is known, is used to illustrate how oceans would look in the absence of currents or tides. The bright yellow colours show gravity at its strongest, while it is at its weakest in the blue areas. There appears to...
  • Climate Change Is Making the Earth Wobble

    12/12/2015 2:47:24 PM PST · by PROCON · 129 replies
    yahoo ^ | Dec. 11, 2015 | Emily J. Gertz
    As pollution from burning fossil fuels continues to heat the atmosphere, the world's glaciers are melting at an accelerating rate. Scientists widely agree that this meltwater has been a major factor in raising global sea levels about seven inches over the 20th century. The movement of all that water is affecting the Earth's rotation, according to a study published Friday in the journal Science. "If you are melting glaciers from high latitudes--in Alaska, Greenland, or Iceland--you move mass away from the pole, toward the equator, which slows the Earth down," said Jerry Mitrovica, the study's lead author and a Harvard...
  • The Money and Connections Behind Al Gore’s Carbon Crusade

    10/09/2007 4:02:32 PM PDT · by vadum · 26 replies · 1,021+ views
    Human Events ^ | October 3, 2007 | Deborah Corey Barnes
    Al Gore’s campaign against global warming is shifting into high gear...But while the mainstream media promote his ideas about the state of planet Earth, they are mostly silent about the dramatic impact his economic proposals would have on America...and routinely ignore evidence that he may personally benefit from his programs. Would the romance fizzle if Gore’s followers realized how much their man stands to gain?...... Never mind that the scientific community is divided over what causes global warming, how bad it is and how to deal with it. Gore plays Chicken Little to the media’s applause, insisting that the world...
  • Researchers find fast flip in Earth’s magnetic field

    08/23/2018 12:39:17 PM PDT · by BenLurkin · 22 replies
    earthsky.org ^ | | August 22, 2018 | Deborah Byrd
    A research team led by scientists in Taiwan and [Red] China announced on August 21, 2018, that Earth’s protective magnetic field has undergone relatively rapid shifts in the past, including one lasting just two centuries. That’s fast in contrast to the thousands of years thought to be needed for a magnetic pole reversal, an event whereby magnetic south becomes magnetic north and vice versa. Such an event might leave Earth with a substantially reduced magnetic field for some unknown period of time, exposing our world to dangerous effects from the sun. If it occurred in today’s world of ubiquitous electric...
  • Jupiter and Venus Change Earth’s Orbit Every 405,000 Years

    05/10/2018 7:28:52 PM PDT · by BenLurkin · 61 replies
    universetoday.com ^ | 05/10/2018 | Matt Williams
    Over the course of the past 200 million years, our planet has experienced four major geological periods (the Triassic, Jurassic and Cretaceous and Cenozoic) and one major ice age (the Pliocene-Quaternary glaciation), all of which had a drastic impact on plant and animal life, as well as effecting the course of species evolution. For decades, geologists have also understood that these changes are due in part to gradual shifts in the Earth’s orbit, which are caused by Venus and Jupiter, and repeat regularly every 405,000 years. But it was not until recently that a team of geologists and Earth scientists...
  • Earth’s Second Magnetic Field: Satellite Image Reveals Invisible Force From Ocean Currents

    04/12/2018 6:58:36 AM PDT · by DUMBGRUNT · 63 replies
    Inquisitr ^ | 12 Apr 2018 | Mia Lorenzo
    The Earth has a second magnetic field, one generated by ocean currents. Researchers know little about it, but images captured by satellites show this invisible force generated by the world’s salty oceans in perfect detail. ... ESA released a video detailing the changes in the Earth’s magnetic field over a 24-hour period... ...“It’s a really tiny magnetic field. It’s about 2-2.5 nanotesla at satellite altitude, which is about 20,000 times weaker than the Earth’s global magnetic field.”... Oceans may have a small contribution to the magnetic field that protects the planet from harmful cosmic rays, but it remains to be...
  • Africa PHENOMENON threatens to FLIP Earth's magnetic field, taking the poles with it

    03/08/2018 10:41:30 AM PST · by SunkenCiv · 101 replies
    Express.co.uk ^ | Wednesday, March 7, 2018 | Sakura Evans
    New research shows the most significant weakening is happening under Africa which has been dubbed the 'South Atlantic Anomaly' (SAA). As well as giving us our north and south poles, the magnetic field blankets the Earth, protecting it from solar winds and cosmic radiation. The forcefield has weakened significantly over the past 160 years and scientists now suggest it could be in the process of flipping. Such a change would be a switch in magnetic polarity and would see compasses point south rather than north. Scientists believe such an occurrence has actually happened several times in the history of our...
  • Rediscovering north Local vet’s work on magnetism changed maps, textbooks

    11/13/2017 7:52:58 AM PST · by SandRat · 23 replies
    SierraVista Herald ^ | David Rookhuyzen
    At first blush, Frank Klein is another distinguished veteran in a military town full of them. But the 96-year-old retired U.S. Air Force colonel can also lay claim to a special footnote in history. In addition to being a decorated officer and skilled navigator, he’s the man who helped redefine where north was. The Wauwatosa, Wisconsin, native’s journey to his footnote was a circuitous one. Following high school, he had a mind to go into acting and actually moved to New York City. For a year he had a role on a weekly CBS radio program, where he would rub...
  • Is the Sun DISINTEGRATING? NASA spots monster hole open up on our star

    05/26/2016 5:48:32 PM PDT · by NormsRevenge · 84 replies
    Express UK ^ | 5/26/16 | Jon Austin
    NASA has revealed that a massive hole, measuring more than ten per cent of the Sun's surface area, has opened up on our star. ... NASA says the huge hole is actually not of great concern, but it remains unclear why the coronal holes actually form. ..
  • Pole flips tied to plate tectonics

    11/26/2011 8:27:27 PM PST · by SunkenCiv · 37 replies
    Science News ^ | November 19th, 2011 | Alexandra Witze
    Assumed to be caused by random fluctuations in the circulation of the molten iron core, the flips may actually be tied to what's going on at Earth's surface. At times in the geologic past when landmasses have bunched together on one side of the equator, the Earth's magnetic field has begun flipping soon thereafter... "What we see clearly is that the surface positions of the continents are linked with the frequency of the reversals," says group member François Pétrélis, a geophysicist at the French research agency CNRS in Paris... Computer simulations have shown how molten iron in the spinning core...