Ash and Tephra Fall Hazards at Glacier Peak
Both of the large Plinian-style eruptions of Gl
In areas downwind from Glacier Peak, even small tephra eruptions could disrupt air and ground transportation and dust towns with ash. Tephra could clog drainage ducts and ventilation filters, short- circuit power transformers, damage machinery and electronic equipment, reduce visibility, exacerbate respiratory ailments, and stall transportation. Damage from tephra can be mitigated by such actions as shutting down and covering equipment, frequently replacing air filters in machinery, wearing dust masks, and avoiding unnecessary travel. To learn more about ash fall, visit the volcanic ash website.