After Dark in the Park Video Archives - May 25 2010
Hawai`i Island as a Source of Tsunamis
During large earthquakes, the flanks of Hawai`i's great volcanoes, pushed outward by gravity and magma pressure, sometimes lurch seaward. Large earthquakes, similar to the one in Kalapana in 1975, can produce tsunami waves more than 45 feer high. Join Gerard Fryer, a geophysicist at the Pacific Tsunami Warning Center, to learn how local tsunamis form and how the PTWC intends to send a warning within minutes. Learn about mega-tsunamis, produce by gigantic landslides and reaching as high as a thousand feet, and why they're unlikely until after the next ice age.
Did You Know?
Large volumes of lava move in lava tubes beneath the hardened surface of recent flows. Skylights form when the roof of a lava tube collapses, revealing the molten lava flowing like a river within the tube.