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LAHARS: They’re dangerous but not quite so speedy

Letter by James A. Wooster, Lake Tapps on April 29, 2013 at 2:57 pm | No Comments »
April 29, 2013 2:57 pm

Re: “In case of lahar, just follow the helpful signs” (TNT, 4-29).

Although he may be using hyperbole, reader columnist Scott Candoo is way off in stating that the speed of a lahar is between 1 and 15 miles per second; 15 miles per second is 54,000 miles per hour – a speed more appropriate for an asteroid entering Earth’s atmosphere.

The lahar that hits Orting will be traveling more like 40 mph, and will be composed of mud and possibly ice, with no lava content.

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