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Earth's Magnetic Field
Transcript of Earth's Magnetic Field
- use of compasses early as 11th century A.D.
- 1700, first magnetic chart covering the Atlantic Ocean, produced by Halley Directional drilling
- used in the petroleum industry
- gyro tools or magnetic tools Satellite operations
- prediction of magnetic activity Exploration geophysics
- understanding of the underlying geology - Material that is highly sensitive to magnetization such as a mineral deposit can be mirrored to a bar magnet that creates a small dipole field. William Gilbert (1544-1603) "Father of Magnetism" - Emphasized dipolar nature of magnets
-1st to conclude Earth itself acts like a huge magnet
- Noticed Earth's poles are in close proximity (magnet & geographical) Carl Friedrich Gauss (1777-1855) - Dipolar component had its origin inside the Earth instead of outside.
- Led scientists to believe the origin of the Earth’s magnetic field in terms of ferromagnetism (gigantic bar magnet), various rotation theories, and various dynamo theories. "Prince of Mathematicians" Geomagnetic Storms - Temporary disturbance of the Earth's magnetosphere caused by a solar wind shock wave and/or cloud of magnetic field which interacts with the Earth's magnetic field - Intense solar flares release very high energy particles that can cause radiation poisoning to humans including mammals in the same way as low-energy radiation from nuclear blasts. Summary/Bibliography Ronald , M. (201011). Our Magnetic Earth : The Science of Geomagnetism. University of Chicago Press.
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Saunders, R. (2005). Static magnetic fields: animal studies. Progress in Biophysics and Molecular Biology, 87(2-3), 225–239. Retrieved , from http://www.sciencedirect.com.ezproxy.hpu.edu/science/article/pii/S0079610704001075 The Earth's Magnetic Field. (n.d.). Retrieved from http://csep10.phys.utk.edu/astr161/lect/earth/magnetic.html
Earth's Magnetic Field. (n.d.). Retrieved from http://www.windows2universe.org/earth/Magnetosphere/earth_magnetic_field.html
Earthâ??s Dynamo, Chapter 6 - Earthâ??s Magnetic Field. (n.d.). Retrieved from https://sites.google.com/site/earthsmagneticfield/the-truth-about-earth-s-magnetic-field/earth-s-dynamo-chapter-6
Earth?s Magnetic Field. (n.d.). Retrieved from http://www.universetoday.com/27005/earths-magnetic-field/
Gauss, Karl Friedrich (1777-1855) -- from Eric Weisstein's World of Scientific Biography. (n.d.). Retrieved from http://scienceworld.wolfram.com/biography/Gauss.html
What causes the Earth's magnetic field?| Explore | physics.org. (n.d.). Retrieved from http://www.physics.org/article-questions.asp?id=64 Beauty