Latest Geomagnetism Stories

2013-07-11 16:18:48

On July 9, 2013, at 11:09 a.m. EDT, the sun erupted with an Earth-directed coronal mass ejection or CME, a solar phenomenon that can send billions of tons of particles into space that can reach Earth one to three days later.

ESA Researchers Discover Solid Proof Of Plasmapheric Winds
2013-07-02 14:21:24

A study published in the journal Annales Geophysicae provides the first conclusive proof of the existence of plasmaspheric wind.

Mysterious Third Radiation Belt Around Earth
2013-06-21 05:07:13

Scientists have long believed that the Van Allen radiation belts, discovered in the Earth’s upper atmosphere in 1958, consisted of two doughnut-shaped rings of highly charged particles. The inner ring is comprised of high-energy electrons and energetic positive ions, and the outer ring of high-energy electrons.

NASA Wind Discovers SLAMS Magnetic Waves
2013-04-17 11:48:16

Analysis of data collected by NASA’s Wind spacecraft as it travelled through the front of the Earth’s magnetosphere has revealed a special type of magnetic pulsations called SLAMS.

Aurora Illuminates Sky Near Tromsø, Norway
2013-04-15 10:19:28

These colorful displays are produced when electrically charged particles traveling from the Sun in the solar wind are channeled along Earth’s magnetic field lines and strike atoms high in the atmosphere.

Powerful Coronal Mass Ejection Erupts On Sun's Earth-Facing Side
2013-03-15 13:42:58

A powerful solar eruption occurred on the surface of the sun at 2:54 a.m. (EDT) this morning. The eruption, called a coronal mass ejection (CME), occurred on the Earth-facing side of the sun and may have released billions of tons of solar particles into space racing their way toward Earth, potentially making impact within three days.

Van Allen Probes Discover New Radiation Belt, Possibly Due To Solar Storm
2013-02-28 14:59:50

The Van Allen Belts surrounding Earth were thought to be just two giant swaths of radiation, first discovered in 1958. More than a half-century later, NASA launched twin Van Allen Probes (August 30, 2012) to create a detailed map of the region and catalogue a variety of energies and particles in these radiation belts.

Latest Geomagnetism Reference Libraries

2010-10-21 16:58:49

The compass is a tool that helps the user navigate using the Earth's magnetic poles by using a magnetized pointer that reacts to magnetic fields. Since a compass can be used to calculate a heading it quickly improved the safety and efficiency of travel, especially ocean travel. It has only recently been replaced by Global Positioning Systems. It works by indicating the direction of the magnetic north of a planet's magnetosphere. Generally the face of a compass highlights the north, south,...

Ring Current
2004-10-19 04:45:44

Ring Current -- A ring current is an electric current carried by charged particles trapped in a planet's magnetosphere. It is caused by the longitudinal drift of energetic (10-200 keV) particles. Earth's Ring Current Earth's ring current is responsible for geomagnetic storms. The ring current system consists of a band, at a distance of 3-5 RE(1), which lies in the equatorial plane and circulates clockwise around the Earth (when viewed from the north). The particles of this region...

2004-10-19 04:45:41

Van Allen Radiation Belt -- The Van Allen radiation belt is a torus of energetic charged particles around Earth, trapped by Earth's magnetic field. The presence of a radiation belt had been theorized prior to the Space Age and the belt's presence was confirmed by the Explorer I on January 31, 1958 and Explorer III missions, under Doctor James Van Allen. The trapped radiation was first mapped out by Explorer IV and Pioneer III. Qualitatively, it is useful to view this belt as consisting...

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Word of the Day
  • In medieval musical notation, a sign or neume denoting a shake or trill.
The word 'quilisma' comes from a Greek word meaning 'a roll'.