About Magnetosphere

The study of the region of space near the Earth helps to determine changes in the Earth's magnetosphere, ionosphere, and upper atmosphere in order to enable specification, prediction, and mitigation of their effects. Heliophysics seeks to develop an understanding of the response of the near-Earth plasma regions to space weather. This complex, highly coupled system protects Earth from the worst solar disturbances while redistributing energy and mass throughout. A key element involves distinguishing between the responses to external and internal drivers, as well as the impact of ordinary reconfigurations of environmental conditions, such as might be encountered when Earth crosses a magnetic sector boundary in the solar wind. This near-Earth region harbors spacecraft for communication, navigation, and remote sensing needs; conditions there can adversely affect their operation. Ground based systems, such as the power distribution grid, can also be affected by ionospheric and upper atmospheric changes. Key near-term investigations emphasize understanding the nature of the electrodynamic coupling, how geospace responds to external and internal drivers, and how the coupled middle and upper atmosphere respond to external forcings and how they interact with each other. History of magnetospheric physics Theories about the solar plasma stream and its interaction with Earth were published as early as 1931. During the next several decades multiple scientists, including Sydney Chapman and Hannes Alfvén, proposed a variety of mechanisms and explanations.The Earth's magnetosphere was first measured in 1958 by Explorer 1 during the research performed for the International Geophysical Year.In August and September 1958, Project Argus was performed to test a theory about the formation of radiation belts that may have tactical use in war. The Earth's Magnetic Field The Earth has a magnetic field with north and south poles. The Earth's magnetic field reaches 36,000 miles into space.The magnetic field of the Earth is surrounded in a region called the magnetosphere. The magnetosphere prevents most of the particles from the sun, carried in solar wind, from hitting the Earth. Some particles from the solar wind can enters the magnetosphere. The particles that enter from the magnetotail travel toward the Earth and create the auroral oval light shows.