Ежемесячный отчёт Йеллоустоунской вулканической обсерватории за август 2021 г..

USGS location: --- Yellowstone Volcano Observatory scientist-in-charge Mike Poland tells the story behind the color change of Morning Glory Pool and shows how to recognize seasonal changes in ground deformation data in this September 1, 2021 video update of volcano and earthquake activity at Yellowstone Volcano. Morning Glory has a cautionary tale to tell about how humans can impact the way thermal features look and behave. Morning Glory was a beautiful, deep blue color (it was named after the flower). But the pool was right next to the road that came into the Old Faithful area so it was heavily visited. People would throw things into the pool, like rocks, coins, and handkerchiefs. This clogged the thermal input to the pool, lowering its temperature. Thermophilic bacteria began to occupy different parts of it of the pool, and the pool lost its deep blue color. Efforts to clean it out helped, but the color of the pool has nev