News tagged with earths magnetic
Reading Earth's magnetic history
In order to date environmental events from Earth's history — such as meteorite impacts or climate change — geologists have long studied variations in slow-growing seafloor sedimentary rocks called ...
Space & Earth / Earth Sciences
Mar 04, 2011 |
5 / 5 (7) |
6
|
Rare earths 'replaced' by silicon chip
Rare earths are an expensive and necessary component of strong permanent magnets. However, their use for this purpose can be optimised and thereby reduced. This has been demonstrated in computer simulations ...
Feb 28, 2011 |
4.8 / 5 (5) |
5
|
China announces shakeup of rare earths industry
(AP) -- China plans to tighten control over rare earths producers and restrict output in a five-year development strategy, the Cabinet said Wednesday, amid concern abroad about plans to reduce exports of the exotic minerals ...
Feb 16, 2011 |
5 / 5 (10) |
9
Ground-based lasers vie with satellites to map Earth's magnetic field
(PhysOrg.com) -- Mapping the Earth's magnetic field – to find oil, track storms or probe the planet's interior – typically requires expensive satellites.
Feb 14, 2011 |
4.8 / 5 (12) |
2
|
Tracking the origins of speedy space particles (w/ Video)
(PhysOrg.com) -- NASA's Time History of Events and Macroscale Interaction during Substorms (THEMIS) spacecraft combined with computer models have helped track the origin of the energetic particles in Earth's ...
Space & Earth / Space Exploration
Jan 31, 2011 |
5 / 5 (4) |
2
|
Image: Holes in the Sun's corona
This Solar Dynamics Observatory image of the Sun taken on January 10 in extreme ultraviolet light captures a dark coronal hole just about at sun center.
Space & Earth / Space Exploration
Jan 12, 2011 |
5 / 5 (5) |
0
First measurement of magnetic field in Earth's core
(PhysOrg.com) -- A University of California, Berkeley, geophysicist has made the first-ever measurement of the strength of the magnetic field inside Earth's core, 1,800 miles underground.
Space & Earth / Earth Sciences
Dec 16, 2010 |
4.9 / 5 (19) |
10
|
Hitachi develops recycling technologies for rare earth metals
Hitachi today announced that it has developed technologies for recycling rare earth magnets from hard disk drive (HDD) motors and air conditioners and other compressors. Specifically, developed machinery to separate and collect ...
Dec 16, 2010 |
4.7 / 5 (3) |
1
Planetary magnetic fields: The hunt for better models
Some three thousand kilometers below the surface of the Earth and with temperatures reaching those at the surface of the sun, the core of our home planet is no more within our physical reach today than it ...
Space & Earth / Space Exploration
Nov 25, 2010 |
4.9 / 5 (10) |
4
|
Cluster helps disentangle turbulence in the solar wind
From Earth, the Sun looks like a calm, placid body that does little more than shine brightly while marching across the sky. Images from a bit closer, of course, show it's an unruly ball of hot gas that can ...
Space & Earth / Space Exploration
Oct 04, 2010 |
5 / 5 (6) |
2
|
Evidence of second fast north-south pole flip found
(PhysOrg.com) -- The Earth's magnetic poles flip around every 200,000 years or so, with north becoming south and vice versa. Normally, the process takes 4-5,000 years and it ought to be impossible for the ...
Space & Earth / Earth Sciences
Sep 06, 2010 |
4.7 / 5 (44) |
29
|
Arctic rocks offer new glimpse of primitive Earth
Scientists have discovered a new window into the Earth's violent past. Geochemical evidence from volcanic rocks collected on Baffin Island in the Canadian Arctic suggests that beneath it lies a region of the Earth's mantle ...
Space & Earth / Earth Sciences
Aug 11, 2010 |
5 / 5 (11) |
6
|
Spacequakes Rumble Near Earth (w/ Video)
Researchers using NASA's fleet of five THEMIS spacecraft have discovered a form of space weather that packs the punch of an earthquake and plays a key role in sparking bright Northern Lights. They call it ...
Space & Earth / Space Exploration
Jul 28, 2010 |
4.8 / 5 (21) |
0
|
Silver tells a volatile story of Earth's origin: Water was present during its birth
Tiny variations in the isotopic composition of silver in meteorites and Earth rocks are helping scientists put together a timetable of how our planet was assembled beginning 4.568 billion years ago. The new ...
Space & Earth / Earth Sciences
May 13, 2010 |
4.1 / 5 (19) |
5
|
Lopsided Growth at the Earth's Core
What has twisted the Earth’s core so asymmetrically out of shape? That question has been a long-standing mystery for scientists, but two new studies are shining some light on the geodynamic processes that ...
Space & Earth / Earth Sciences
Apr 21, 2010 |
4.8 / 5 (17) |
9
|
