Nearly 100 years ago in Alaska, the 20th century's largest volcanicblast reduced global temperatures for at least a year and spreadash as far as the Mediterranean Sea. To mark the centennial anniversary of Novarupta-Katmai eruptionnext month, the U.S. Geological Survey plans a summer-long seriesof lectures, programs and other events. For starters, the agency has also put a lot of cool stuff online at the Alaska Volcano Observatory website. |
Highlights include a new historical volume and a timeline that documents accounts and fallout from the three-day eruptionthat began June 6, 1912. Bet you didn't know: Explosions were heard 755 miles away in Juneau, but not inKodiak 105 miles away. That's likely because of shadow zones caused by sound waves bouncing off the Earth's atmosphere, thetimeline says. The blowout spewed seven cubic miles of ash.
That would havebeen enough to bury today's municipality of Anchorage three milesdeep, a USGS press release said. Flowing ash created the Valley of Ten Thousand Smokes, asthousands of fumaroles released steam plumes, some more than 500feet high. Mount Katmai collapsed by about 4,000 feet, leaving a caldera. Find the main page here featuring all the events, activities and videos -- including afilm from the late 1960s describing astronaut training in themoon-like valley created by the explosion.
A few of the upcoming USGS lectures and programs in Fairbanks, Kodiak and Anchorage include: A children's program will bring the Katmai eruption to lifewith accounts and old photos. It's set for Wednesday, June 6, at 10a.m. in Kodiak's Baranov museum . On Wednesday, June 6 at 2 p.m.
in Anchorage, USGS geologistMichelle Coombs will give a free public lecture, "MonitoringAlaska's volcanoes." The talk will be held at the Alaska PublicLands Information Center at 605 W. Fourth Ave. in Suite 105. Coombs' Wednesday afternoon talk will launch a summer series of lectures in downtown Anchorage. The Alaska Volcano Observatory and othergroups will host the talks on volcano topics at 2 p.m.
eachWednesday in the Alaska Public Lands Information Center.
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