Portal:Geophysics/Did you know/1


 * ... that the Gregory Rift in East Africa contains the world's only active carbonatite volcano, Ol Doinyo Lengai (pictured)?
 * ...that one way to calculate distances in terms of latitude and longitude is the Haversine formula?
 * ...that the supercontinent Pannotia only lasted about sixty million years before disintegrating into four continents?
 * ... that the 2002 Sumatra earthquake is considered to be a foreshock of the 2004 Indian Ocean earthquake?