USGS scientist Margaret Mangan, who is retiring soon, has drawn attention to California's more overlooked natural threats: a dozen restive volcanoes.
, which produced a supereruption that flung ash across the southwestern U.S. 760,000 years ago.
But the eruption brought European air traffic to a halt for a week, stranding millions of passengers, including the mother of an employee at the California Governor’s Office of Emergency Services. It prompted the agency to realize that the same thing could happen in California — and that the state wasn’t prepared.
As with Eyjafjallajökull, even a small paroxysm could snarl air travel. Planes regularly fly over California’s volcanoes, ferrying up to 300,000 passengers to, from and along the West Coast every day. Each year, millions more people drive through the Mt. Shasta hazard zone on Interstate 5 between Redding and the Oregon border.
Margaret Mangan, on detail with the USGS Alaska Volcano Observatory, gives a media briefing during a 2009 eruption of Redoubt volcano in Alaska. Communities can also increase their resilience by fortifying critical equipment, like electrical substations, with protective shields and closing air intakes to keep ash out of buildings.
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