|
All Articles Tagged As: magnetic field
 | Scientists understand that Earth's magnetic field has flipped its polarity many times over the millennia. The answer, from the geologic and fossil records we have from hundreds of past magnetic polarity reversals, seems to be "no." ...> Full Article |
 | Oil and mineral companies, climatologists and geophysicists all rely on expensive satellites to measure the Earth's magnetic field, but there may be a cheaper option. UC Berkeley physicist Dmitry Budker proposes shining a pulsed orange laser on the layer of sodium atoms 90 km above the Earth to directly read the local magnetic field. All that's needed is a simple laser like those used to produce laser guide stars for telescopes, plus a telescope detector. ...> Full Article |
 | Measurements of the magnetic field at the earth's surface can tell only so much about the dynamo producing it in the planet's core. UC Berkeley geophysicist Bruce Buffett has now used precise astronomical position data to calculate tidal damping in the core and determine for the first time the magnetic field in the center of the planet. The measurement, 25 Gauss, is in the middle of what various scientists have predicted. ...> Full Article |
 | A new method of capturing detailed, three-dimensional images of minute samples of material under extreme pressures is shedding light how Earth's interior evolved. Early results suggest that the early Earth did not have to be entirely molten to separate into the rocky crust and iron-rich core it has today. Researchers at Stanford University and SLAC National Accelerator Laboratory are leading the group pioneering the technique, which could lead to a wide range of new experiments. ...> Full Article |
 | Scientists at the University of Rochester have discovered that the Earth's magnetic field 3.5 billion years ago was only half as strong as it is today, and that this weakness, coupled with a strong wind of energetic particles from the young Sun, likely stripped water from the early Earth's atmosphere. ...> Full Article |
 | Princeton University scientists have shown that, in ancient times, the Earth's magnetic field was structured like the two-pole model of today, suggesting that the methods geoscientists use to reconstruct the geography of early land masses on the globe are accurate. The findings may lead to a better understanding of historical continental movement, which relates to changes in climate. ...> Full Article |
Ancient lava flows are guiding a better understanding of what generates and controls the Earth's magnetic field - and what may drive it to occasionally reverse direction.
...> Full Article
Effects on the magnetic field
...> Full Article
Researchers studying cores of sediment collected 40 years ago have found evidence for magnetic field vortices in the Earth's core beneath the South Pole. The results contrast with earlier studies at lower latitudes, and could lead to a better understanding of processes in the core.
...> Full Article
 | Researchers have presented evidence that their theory about the core of the earth is correct. Among other applications, the findings may be of significance for our understanding of the cooling down of the earth, and of the stability of the earth's magnetic field. ...> Full Article |
|
|
Subscribe
New species of ancient crocodile discovered
Kitchen gadget inspires scientist to make more effective plastic electronics
Making memories last
Ferroelectric switching discovered for first time in soft biological tissue
Forensic research extends detection of cyanide poisoning
The wild early lives of today's most massive galaxies
Shakespeare's skill 'more in grammar than in words'
Detailed picture of how myoV 'walks' along actin tracks
Need muscle for a tough spot? Turn to fat stem cells
Earth's energy budget remained out of balance despite unusually low solar activity
Pictures of food create feelings of hunger
Mighty mesh
Sweeten up your profits with the right hybrid
Patterns of antibiotic-resistant bacteria found in Galapagos reptiles
How seawater could corrode nuclear fuel
Bilayer graphene works as an insulator
Patterns of chromosome abnormality: The key to cancer?
Advantages of living in the dark: The multiple evolution events of 'blind' cavefish
Snakes improve search-and-rescue robots
Enhancing cognition in older adults also changes personality
Magnetic actuation enables nanoscale thermal analysis
A new artificial intelligence technique to speed the planning of tasks when resources are limited
'Tiger mothers' should tame parenting approach
Film coatings made from whey
Growing US violent extremism by the numbers
If a fat tax is coming, here's how to make it efficient, effective
Bobsled runs -- fast and yet safe
Fruit fly intestine may hold secret to the fountain of youth
New study may answer questions about enigmatic Little Ice Age
What really happened prior to 'Snowball Earth'?
Injecting sulfate particles into stratosphere won't fully offset climate change
Scientists aboard Iberian coast ocean drilling expedition report early findings
Waiting for Death Valley's Big Bang
Rock stability research could make mining and construction safer
Researchers identify molecular 'culprit' in rise of planetary oxygen