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How do tsunamis move as fast as jetliners in the open sea? Why does the ocean often recede before these deadly waves appear at beaches? How much time do you have to get safely away once you see the sea retreat?
You might find answers to some of your questions about tsunamis elsewhere on this "Wave That Shook the World" Web site. But some queries may require outside help, and that's why we approached tsunami expert Lori Dengler of Humboldt State University.
Below, see Dengler's comprehensive responses to questions emailed to NOVA by viewers. Please note: We are not accepting any new questions.
Lori Dengler
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Dr. Dengler on the site of the 2001 tsunami at Camana, Peru
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Lori Dengler, Ph.D., is Professor of Geology at Humboldt State University in Arcata,
California, and an expert on tsunami hazards and mitigation. She was a member of the
National Tsunami Hazard Mitigation Program (NTHMP) Steering Committee from 1996 to 2003
and authored the Strategic Implementation for Mitigation Projects for the NTHMP.
Dr. Dengler was the first recipient of NOAA's Richard Hagemeyer Tsunami Mitigation Award
for her leadership and involvement in the Redwood Coast Tsunami Work Group; community
education activities in Del Norte and Humboldt counties, California; and other activities
promoting and supporting tsunami mitigation. She was a member of post-tsunami survey
teams to Papua New Guinea (1998) and Southern Peru (2001). Currently she is studying
the tsunami hazards of San Francisco Bay and is completing a monograph on the 1964
tsunami in Crescent City, California.
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