Hypothetical Yellowstone Super-Eruption Could Disrupt Much of North America
publishers 5articles 5first reported 22 Sep, 08:32 UTCdeveloping since 22 Sep · 6 editions
A hypothetical super-eruption at Yellowstone would probably be preceded by weeks of escalating warning signs rather than occur without notice, according to a scenario described by Science Daily. Possible indicators would include earthquake swarms moving through the region, rapid uplift of the ground, changes in geyser activity and increasing emissions of volcanic gases.
In the scenario’s worst case, those developments could culminate in a Volcanic Explosivity Index 8 eruption. Ash would be blasted tens of kilometers into the atmosphere, while deadly pyroclastic flows would devastate areas near the volcano. Heavy ashfall could also bury parts of the western United States.
The effects described extend well beyond Yellowstone. Ash and related damage could severely disrupt transportation, electrical grids, water systems, agriculture and communications across much of North America. Other coverage characterized the exercise as a minute-by-minute or blow-by-blow account of a present-day eruption and raised the possibility of effects on the global climate. The accounts describe a hypothetical worst-case scenario, not an eruption currently underway.
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