A 4,000-foot-high mountainside released approximately 120 million metric tons of rock in 60 seconds during a landslide onto the Lamplugh Glacier in Glacier Bay National Park and Preserve. In an interview with the Alaska Dispatch News, geophysicist Colin Stark of Columbia University's Lamont-Doherty Earth Observatory, described the slide as &ldquo;exceptionally large.&rdquo; He compared the massive landslide to roughly 60 million medium SUVs tumbling down a mountainside.<br />
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The slide occurred on the morning of June 28  in a remote area of Glacier Bay National Park in southeast Alaska. It was first observed by Paul Swanstrom, pilot and owner of Haines-based Mountain Flying Service. Swanstrom noticed a huge cloud of dust over the Lamplugh Glacier during a flightseeing tour of Glacier Bay National Park several hours after the slide occurred. Swanstrom estimates the debris field to be 6.5 miles long, and one to two miles in width.<br />
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Even two days later, as this aerial photo of the Lamplugh Glacier landslide shows, a dust cloud remained over the unstable mountainside due to still tumbling rock.