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Geomagnetic indexes --- Geomagnetism --- Geomagnetism. --- Earth magnetic field --- Geomagnetic field --- Magnetism, Terrestrial --- Terrestrial magnetic field --- Terrestrial magnetism --- Geophysics --- Magnetism
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Solar activity --- Geophysics --- Geophysics. --- Solar activity. --- Geological physics --- Terrestrial physics --- Solar radiation --- Stellar activity --- Earth sciences --- Physics --- Periodicals
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Ionograms. --- Ionosphere --- Research --- Graphic methods.
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Geophysics --- Topographical surveying --- Research --- Mathematical models. --- Data processing.
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"The purpose of this Guide is to provide additional material to educators interested in using the Stratovolcanoes of the World poster published by the National Geophysical Data Center in August 2000. For each volcano featured on the poster, NGDC provides a map showing the location of the volcano, a table of facts, a short fictional story to bring the volcano to life, and a section with questions to ponder, suggested activities, and additional references."
Volcanoes --- Volcanism --- Volcanic ash, tuff, etc. --- Study and teaching (Middle school) --- Activity programs.
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Database is a collection of damage and felt reports for over 23,000 U.S. earthquakes. Also contains information regarding epicentral coordinates, magnitudes, focal depths, names and coordinates of reporting cities (or localities), reported intensities, and the distance from city (or locality) to epicenter.
Earthquakes --- Earthquake intensity --- Earthquake magnitude --- Measurement
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Earthquake damage --- Earthquakes --- California --- History
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Searchable database contains information on destructive earthquakes from 2150 B.C. to the present that meet at least one of the following criteria: Moderate damage (approximately $1 million or more), 10 or more deaths, Magnitude 7.5 or greater, Modified Mercalli Intensity X or greater, or the earthquake generated a tsunami.
Earthquakes --- Earthquake intensity --- Earthquake magnitude --- Measurement
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