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Keyword: magneticfields

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  • Tsunamis' magnetic fields are detectable before sea level change

    12/22/2021 8:14:37 PM PST · by BenLurkin · 11 replies ^ | DECEMBER 21, 2021 | American Geophysical Union
    A new study finds the magnetic field generated by a tsunami can be detected a few minutes earlier than changes in sea level and could improve warnings of these giant waves. Tsunamis generate magnetic fields as they move conductive seawater through the Earth's magnetic field. Researchers previously predicted that the tsunami's magnetic field would arrive before a change in sea level, but they lacked simultaneous measurements of magnetics and sea level that are necessary to demonstrate the phenomenon. The new study provides real-world evidence for using tsunamis' magnetic fields to predict the height of tsunami waves using data from two...
  • Brown crabs mesmerised by underwater power cables for renewable energy sources, study finds

    10/11/2021 12:55:11 AM PDT · by blueplum · 26 replies
    Sky News ^ | 10 October 2021 | Alexa Phillips, news reporter
    Offshore wind farms requiring extensive underwater cabling are installed and planned around Scotland's coast, and researchers said they could destabilise the nation's brown crab population if precautions are not taken. Brown crabs are mesmerised by underwater power cables for renewable energy sources, scientists have found. The cables emit an electromagnetic field which causes them to sit still...
  • Magnetic Fields Around NASA's Mars Lander Are 10 Times Stronger Than Scientists Expected

    03/08/2020 8:23:44 PM PDT · by BenLurkin · 37 replies ^ | 9 MARCH 2020 | MATT WILLIAMS, UNIVERSE TODAY
    These readings were obtained by InSight's magnetic sensor, which studied the magnetic fields within the mission's landing zone. This shallow crater, known as "Homestead hollow", is located in the region called Elysium Planitia – a flat-smooth plain just north of the equator. This region was selected because it has the right combination of flat topology, low elevation, and low debris to allow InSight to probe deep into the interior of Mars. Prior to this mission, the best estimates of Martian magnetic fields came from satellites in orbit and were averaged over distances of more than 150 kilometres (93 miles). Measuring...
  • Quantum Locking Will Blow Your Mind—How Does It Work?

    01/22/2020 12:31:12 PM PST · by Enlightened1 · 43 replies
    The Action Lab ^ | 01/09/20
    In this video I use a type II superconductor to perform a quantum locking demonstration using YCBO (Yttrium barium copper oxide). I then explain in depth how superconductors and quantum locking (Flux pinning) works.
  • Physicists Stuffed a Ghostly 'Skyrmion' Full of 'Antiskyrmions'

    04/06/2019 1:48:35 PM PDT · by BenLurkin · 37 replies ^ | Rafi Letzter
    There are ghostly shapes hidden in magnetic fields. They're not made of stuff in the way a lightning bolt or a beam of light is. A lighting bolt carries a fairly defined group of electrons from the sky all the way to the ground.... But magnetic fields contain things called skyrmions that are different from electrons and photons; a skyrmion is a knot of magnetic field lines looping around each other. As it drifts from one spot to the next, a skyrmion makes itself anew out of the magnetic field lines that are already there. The knot holds together because...
  • Solar Activity, Earth's Magnetic Field and Galactic Cosmic Rays Affect Climate

    11/12/2007 10:07:52 PM PST · by Robert A Cook PE · 48 replies · 524+ views ^ | 20 June 2007 | Dergachev, V.A., Dmitriev, P.B., Raspopov, O.M. and Jungner, H.
    References: Dergachev, V.A., Dmitriev, P.B., Raspopov, O.M. and Jungner, H. 2006. Cosmic ray flux variations, modulated by the solar and earth's magnetic fields, and climate changes. 1. Time interval from the present to 10-12 ka ago (the Holocene Epoch). Geomagnetizm i Aeronomiya 46: 123-134. What was done The authors review what they deem to be the salient features of the interacting effects of variations in solar activity and earth's magnetic field on the flux of galactic cosmic rays, together with the likelihood of their potential impact on earth's climate, based on "direct and indirect data on variations in cosmic rays,...
  • Team Finds Magnetic Islands Are Source of Mysterious High Speed Electrons

    10/05/2006 3:02:36 PM PDT · by Fred Nerks · 24 replies · 797+ views ^ | October 04, 2006 | website
    A team of scientists led by University of Maryland physics professor James Drake appear to have solved a key remaining mystery about how the interaction of magnetic fields produce the explosive releases of energy seen in solar flares, storms in the Earth’s magnetosphere and many other powerful cosmic events. In recent years, researchers have answered many questions about this process, but one thing they have been unable to explain is data from solar observing satellites indicating that up to half of the energy released during solar flares is in the form of energetic electrons. Large numbers of these low-mass particles...

    09/01/2004 6:59:07 PM PDT · by alanejackson · 2 replies · 219+ views
    THE NEWS-TIMES, Morehead City-beaufort, N.C. | Nov. 11, 1985 | JOHN HACKNEY
    The following article is from; THE NEWS-TIMES, Morehead City-beaufort, N.C. Monday, Nov. 11, 1985. "LOCAL THEORIST BELIEVES MOVEMENT IS ESSENTIAL TO CELLULAR GROWTH, LIFE". By JOHN HACKNEY, News-Times Staff Writer. ALAN JACKSON, Morehead City, fancies himself as a backyard philosopher. He spends a lot of hours reading books, magazines and research papers trying to understand just why certain things are the way they are. Mr. Jackson's most recent research has yielded an astounding theory; that movement is as important as nourishment to human beings. He came to that conclusion based on the behavior of magnetic bacteria. He also believes these...
  • Earth's Magnetic Field Weakens 10 Percent (and some other stuff)

    12/12/2003 6:26:01 PM PST · by NormsRevenge · 20 replies · 588+ views
    Yahoo News ^ | 12/12/03 | Andrew Bridges - AP
    SAN FRANCISCO - The strength of the Earth's magnetic field has decreased 10 percent over the past 150 years, raising the remote possibility that it may collapse and later reverse, flipping the planet's poles for the first time in nearly a million years, scientists said Thursday.   At that rate of decline, the field could vanish altogether in 1,500 to 2,000 years, said Jeremy Bloxham of Harvard University. Hundreds of years could pass before a flip-flopped field returned to where it was 780,000 years ago. But scientists at a meeting of the American Geophysical Union cautioned that scenario is an...