• Halema`uma`u Just Before Dawn

    Hawai'i Volcanoes

    National Park Hawai'i

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.

 
Length 01:11:38
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Did You Know?

Waha`ula Visitor Center surrendering to lava.

From 1983 to 1991, lava flows repeatedly invaded communities on Kīlauea's coastal south flank burying eight miles of highway and destroying 181 houses and a visitor center in Hawai`i Volcanoes National Park.