Writings
Helliwell was the author of one book, "Whistlers and Related Ionospheric Phenomena," and more than 90 scientific papers. Three of his papers deserve special mention. One of these reported on low frequency emissions associated with the 1989 Loma Prieta earthquake. Another describes how injection of a low frequency radio signal into the magnetosphere causes a radio quieting of the natural noise that's associated with these frequencies. Another paper showed that the alternating current power grids in North America (60 Hz) and Europe (50 Hz) affect auroral chorus emissions.
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Famous quotes containing the word writings:
“If someday I make a dictionary of definitions wanting single words to head them, a cherished entry will be “To abridge, expand, or otherwise alter or cause to be altered for the sake of belated improvement, one’s own writings in translation.””
—Vladimir Nabokov (1899–1977)
“In this part of the world it is considered a ground for complaint if a man’s writings admit of more than one interpretation.”
—Henry David Thoreau (1817–1862)
“For character, to prepare for the inevitable I recommend selections from [Ralph Waldo] Emerson. His writings have done for me far more than all other reading.”
—Rutherford Birchard Hayes (1822–1893)