One of the best places to visit a cinder cone in the United States is at Sunset Crater National Monument near Flagstaff, Arizona. There you can get really close to Sunset Crater, a cinder cone about 1000 feet tall (305 meters), and Lenox Crater, a smaller and older cinder cone that is...
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During large geomagnetic storms, the aurora oval expands, and the northern lights can be seen in more southerly latitudes. However, this may happen on a much more limited frequency. In the U.S., Alaska is the only state under the aurora belt. Because the aurora is drawn to the earth’s...