You are viewing an obsolete version of the DU website which is no longer supported by the Administrators. Visit The New DU.
Democratic Underground Latest Greatest Lobby Journals Search Options Help Login

Scientists find hole in Earth's Magnetic field [View All]

Printer-friendly format Printer-friendly format
Printer-friendly format Email this thread to a friend
Printer-friendly format Bookmark this thread
This topic is archived.
Home » Discuss » Political Videos Donate to DU
lovuian Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Dec-17-08 11:48 PM
Original message
Scientists find hole in Earth's Magnetic field
Run time: 01:58
Posted on YouTube: December 17, 2008
By YouTube Member:
Views on YouTube: 0
Posted on DU: December 18, 2008
By DU Member: lovuian
Views on DU: 3937

Dec. 16, 2008: NASA's five THEMIS spacecraft have discovered a breach in Earth's magnetic field ten times larger than anything previously thought to exist. Solar wind can flow in through the opening to "load up" the magnetosphere for powerful geomagnetic storms. But the breach itself is not the biggest surprise. Researchers are even more amazed at the strange and unexpected way it forms, overturning long-held ideas of space physics.

"At first I didn't believe it," says THEMIS project scientist David Sibeck of the Goddard Space Flight Center. "This finding fundamentally alters our understanding of the solar wind-magnetosphere interaction."

The magnetosphere is a bubble of magnetism that surrounds Earth and protects us from solar wind. Exploring the bubble is a key goal of the THEMIS mission, launched in February 2007. The big discovery came on June 3, 2007, when the five probes serendipitously flew through the breach just as it was opening. Onboard sensors recorded a torrent of solar wind particles streaming into the magnetosphere, signaling an event of unexpected size and importance.

"The opening was hugefour times wider than Earth itself," says Wenhui Li, a space physicist at the University of New Hampshire who has been analyzing the data. Li's colleague Jimmy Raeder, also of New Hampshire, says "1027 particles per second were flowing into the magnetospherethat's a 1 followed by 27 zeros. This kind of influx is an order of magnitude greater than what we thought was possible."

The event began with little warning when a gentle gust of solar wind delivered a bundle of magnetic fields from the Sun to Earth. Like an octopus wrapping its tentacles around a big clam, solar magnetic fields draped themselves around the magnetosphere and cracked it open. The cracking was accomplished by means of a process called "magnetic reconnection." High above Earth's poles, solar and terrestrial magnetic fields linked up (reconnected) to form conduits for solar wind. Conduits over the Arctic and Antarctic quickly expanded; within minutes they overlapped over Earth's equator to create the biggest magnetic breach ever recorded by Earth-orbiting spacecraft.

Lets put it this way Scottie we need more power to the shields
The Earth's shield is WIDE OPEN
Printer Friendly | Permalink |  | Top
  -Scientists find hole in Earth's Magnetic field lovuian  Dec-17-08 11:48 PM   #0 
  - Is this fear mongering? Would a mass self-fulfilling prophecy lead us to ruin?  trthnd4jstc   Dec-18-08 12:08 AM   #1 
  - I have my own theories about 2012...  soulcore   Dec-18-08 03:24 AM   #4 
  - man I really don't know what I would do with out du and cod4  okieinpain   Dec-18-08 08:01 AM   #9 
  - Not a bad idea  AtheistCrusader   Dec-19-08 04:47 PM   #26 
  - That theory doesn't wash.  Teaser   Dec-18-08 05:46 AM   #6 
  - Have you heard of the Deap Gas Theory concerning how petroleum is created? n/t  trthnd4jstc   Dec-18-08 05:10 PM   #21 
     - Yes, it is roundly rejected by the vast majority of the geologic community  Teaser   Dec-19-08 04:40 PM   #25 
  - You might like my enlightened capitalism site  earcandle   Dec-18-08 11:51 AM   #18 
  - I do like your site. Thanks for the link. n/t  trthnd4jstc   Dec-18-08 05:09 PM   #20 
  - so...  thenorthernsky   Dec-19-08 08:36 PM   #28 
  - Proof The Flying Spaghetti Monster Exists!  Whoa_Nelly   Dec-18-08 12:12 AM   #2 
  - There's that 2012 again.  OxQQme   Dec-18-08 01:02 AM   #3 
  - I can't wait for 2012 to come and go  Teaser   Dec-18-08 05:47 AM   #7 
  - After 2012 it'll be 2030.  AtheistCrusader   Dec-19-08 04:50 PM   #27 
  - cuz, you know, y2k caused all that havoc-  mopinko   Dec-19-08 09:59 PM   #29 
     - First this is NASA findings Second if you want to see the  lovuian   Dec-19-08 10:18 PM   #30 
        - my question  mopinko   Dec-19-08 10:48 PM   #31 
           - here maybe this will help  lovuian   Dec-19-08 11:05 PM   #32 
  - well if we're all going to die anyway  JNelson6563   Dec-18-08 05:05 AM   #5 
  - Time for a Prince remake...  unapatriciated   Dec-18-08 09:03 AM   #11 
  - Finally, a sensible response. nt  montanto   Dec-18-08 09:35 AM   #14 
  - Yeah, we're fucked. n/t  Jamastiene   Dec-18-08 07:21 AM   #8 
  - the poles are shifting, we're due for a flip.. get lots of sun block and same your seeds  sam sarrha   Dec-18-08 08:21 AM   #10 
  - What would be the best way to phograph the resulting aurora? nt  Deep13   Dec-18-08 09:29 AM   #12 
  - Edgar Cayce Can Bite Me  Creationismsucks   Dec-18-08 09:32 AM   #13 
  - So no increase in aurora?  Deep13   Dec-18-08 09:44 AM   #15 
  - Well just ignore the Edgar Cayce comment and look at the  lovuian   Dec-18-08 07:32 PM   #23 
     - but  Creationismsucks   Dec-18-08 08:15 PM   #24 
  - Dad Always DID Yell "Close The Door! We Don't Live in a Barn!"  MagicKenny   Dec-18-08 10:19 AM   #16 
  - This is gonna sound kinda Stupid, but ...  Kweli4Real   Dec-18-08 11:08 AM   #17 
     - Before the field realigns it fails...  soulcore   Dec-18-08 02:44 PM   #19 
        - Its really going to play havoc with the satellites  lovuian   Dec-18-08 07:30 PM   #22 

Home » Discuss » Political Videos Donate to DU

Powered by DCForum+ Version 1.1 Copyright 1997-2002
Software has been extensively modified by the DU administrators

Important Notices: By participating on this discussion board, visitors agree to abide by the rules outlined on our Rules page. Messages posted on the Democratic Underground Discussion Forums are the opinions of the individuals who post them, and do not necessarily represent the opinions of Democratic Underground, LLC.

Home  |  Discussion Forums  |  Journals |  Store  |  Donate

About DU  |  Contact Us  |  Privacy Policy

Got a message for Democratic Underground? Click here to send us a message.

© 2001 - 2011 Democratic Underground, LLC