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The mysteries of the Earth`s magnetic field and sunspots
The mysteries of the Earth`s magnetic field and sunspots

Relating the solar activity to climate variations has a long
Relating the solar activity to climate variations has a long

Space Physics Handout 2 : The Earth`s magnetosphere and
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... sources of these particles are the solar wind itself and the Earth’s ionosphere (see below). The plasma inside the magnetosphere is not uniformly distributed but is grouped into different regions with quite different densities and temperatures. In the magnetotail there is a central region, known as ...
Earth`s magnetic field – what is it good for?
Earth`s magnetic field – what is it good for?

... head off in the wrong direction to collide with Earth but, when a cloud heads our way, it usually takes between one and five days to reach us. Though our magnetosphere deflects most of these charged particles and the atmosphere protects us from the surge in ionising radiation, CMEs can cause geomagn ...
magnetic fields - King`s Senior Science
magnetic fields - King`s Senior Science

... The Earth's magnetic field is similar to that of a bar magnet, but this similarity is superficial. The magnetic field of a bar magnet, or any other type of permanent magnet, is created by the coordinated spins of electrons and nuclei within iron atoms. The Earth's core, however, is hotter than 1043 ...
Study Guide Chapt 7: Solid Earth
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... Earth’s Magnetic field thought to be link to convective fluid motion in liquid outer core. The idea is that when there is an electric current (charge motion) magnetic fields are always created. Convection in the liquid outer core drives electric current in Earth’s interior. This is often referred to ...
Study Guide Chapt 7
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... Earth’s Magnetic field thought to be link to convective fluid motion in liquid outer core. The idea is that when there is an electric current (charge motion) magnetic fields are always created. Convection in the liquid outer core drives electric current in Earth’s interior. This is often referred to ...
A DYNAMO THEORY OF THE AURORA AND MAGNETIC
A DYNAMO THEORY OF THE AURORA AND MAGNETIC

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Lecture notes 100805

... Above the ionosphere about 700 km in height is the lower border for the Magnetosphere, which besides the Earth’s outer magnetic field also has electrons and protons trapped by that field. The “individual” particles move as such over very large distances. Some physicists want to incorporate the magne ...
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Worksheet_18 - Iowa State University
Worksheet_18 - Iowa State University

... 1. An electron is traveling to the right with a speed of 8.5 x 106 m/s when a magnetic field is turned on. The strength of the magnetic field is 0.050 T, and it is directed into the paper. (a) Describe the path of the electron after the field has been turned on (assuming only magnetic effects). (b) ...
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... the corona and into space at a speed of more than 1000 km/s • When reaches Earth about three days later, it meets Earth’s magnetic field • Our magnetic field protects Earth by diverting much of the plasma away from the planet’s surface • This causes particularly vivid and active auroras ...
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< 1 ... 102 103 104 105 106 >

Aurora



An aurora is a natural light display in the sky, predominantly seen in the high latitude (Arctic and Antarctic) regions. Auroras are produced when the magnetosphere is sufficiently disturbed by the solar wind that the trajectories of charged particles in both solar wind and magnetospheric plasma, mainly in the form of electrons and protons, precipitate them into the upper atmosphere (thermosphere/exosphere), where their energy is lost. The resulting ionization and excitation of atmospheric constituents emits light of varying colour and complexity. The form of the aurora, occurring within bands around both polar regions, is also dependent on the amount of acceleration imparted to the precipitating particles. Precipitating protons generally produce optical emissions as incident hydrogen atoms after gaining electrons from the atmosphere. Proton auroras are usually observed at lower latitudes. Different aspects of an aurora are elaborated in various sections below.
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