Portal:Earth sciences/DYK/29

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 * ... that Castle Lake (pictured) was created by the 1980 eruption of Mount St. Helens?
 * ... that Typhoon Caitlin provided drought relief to Okinawa, where reservoir levels rose from 35% to over 80% capacity?
 * ...that the Tibetan Plateau is known as the "roof of the world"?
 * ...that the U.S. Coast and Geodetic Survey was responsible for American weights and measures from 1836 until the establishment of the National Institute of Standards and Technology in 1901?
 * ... that the 2007–2008 Nazko earthquakes in British Columbia, Canada, are the only recorded earthquakes in the Canadian Cordillera away from the coast resulting from magma moving in the Earth?
 * ... that T. Rex and the Crater of Doom details the development of the hypothesis that dinosaurs were wiped out by an impact event?