Word: heliograph
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Dates: during 1950-1959
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...staff came during one of the granddaddies of all magnetic storms on February 10 and 11, 1958. The first hint that something out of the ordinary was happening to the sun came early in the afternoon of the ninth, when an observer, looking through an instrument called a monochromatic heliograph, spotted a flare of breathtaking brilliance leaping out from the Sun's surface. Almost before he could notify the World Data Center on Solar Activity at Boulder, Colorado, confirmation came from the Radio Astronomy Station at Ft. Davis. Bursts of static at 448 megacycles were so loud that the listener...
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