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magnetic storm

a temporary disturbance of the earth's magnetic field, induced by radiation and streams of charged particles from the sun.
Also called geomagnetic storm, solar storm.
1855-60 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for magnetic storm
  • Solar wind will push the magnetosphere to a dynamic state called a magnetic storm.
British Dictionary definitions for magnetic storm

magnetic storm

a sudden severe disturbance of the earth's magnetic field, caused by emission of charged particles from the sun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Contemporary definitions for magnetic storm's 21st Century Lexicon
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magnetic storm in Science
magnetic storm  
A disturbance or fluctuation in the Earth's outer magnetosphere, usually caused by streams of charged particles (plasma) given off by solar flares. The entry of large amounts of plasma into the upper atmosphere results in intense auroral displays and other magnetic phenomena in the polar regions of the Earth. See also aurora.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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magnetic storm in Culture

magnetic storm definition

The effect on the ionosphere of large bursts of charged particles (see electrical charge) from the sun.

Note: During a magnetic storm, radio reception can become very difficult.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Encyclopedia Article for magnetic storm

geomagnetic storm

disturbance of the Earth's upper atmosphere brought on by solar flares-i.e., bright eruptions from the visible portion of the Sun's chromosphere. The material associated with these flares consists primarily of protons and electrons with an energy of a few thousand electron volts. Called plasma, this material moves through the interplanetary medium at speeds ranging from 1,000 to 2,000 km (600 to 1,200 miles) per second, so that the ejected material reaches the Earth in approximately 21 hours. The pressure of the incoming plasma is transmitted to the outer edge of the Earth's magnetosphere; this causes an increase in the observed geomagnetic field at the ground, perhaps through hydromagnetic waves

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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