Boulders as big as refrigerators could be tossed a half-mile, and ash plumes could soar as high as 20,000 feet spread over a 12-mile area, according to Hawaii Civil Defense
Boulders as...
The Civil Engineer (thecivilengineer.org) uses third party cookies to improve our website and your experience when using it. To find out more about the cookies we use and how to delete them visit our Cookies page. Allow cookies