Glacier Peak, Washington simplified hazards map showing potential impact area for ground-based hazards during a volcanic event.
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Glacier Peak, WA simplified hazards map
Glacier Peak, Washington simplified hazards map showing potential impact area for ground-based hazards during a volcanic event.
Map showing one-year probability of accumulation of 1 centimeter
Map showing one-year probability of accumulation of 1 centimeterMap showing one-year probability of accumulation of 1 centimeter (0.4 inch) or more of tephra from eruptions of volcanoes in the Cascade Range.
By
Natural Hazards Mission Area, Volcano Hazards Program, California Volcano Observatory, Cascades Volcano Observatory, Crater Lake, Glacier Peak, Lassen Volcanic Center, Medicine Lake, Mount Adams, Mount Baker, Mount Hood, Mount Jefferson, Mount Rainier, Mount Shasta, Mount St. Helens, Newberry, Three Sisters
Map showing one-year probability of accumulation of 1 centimeter
Map showing one-year probability of accumulation of 1 centimeterMap showing one-year probability of accumulation of 1 centimeter (0.4 inch) or more of tephra from eruptions of volcanoes in the Cascade Range.
By
Natural Hazards Mission Area, Volcano Hazards Program, California Volcano Observatory, Cascades Volcano Observatory, Crater Lake, Glacier Peak, Lassen Volcanic Center, Medicine Lake, Mount Adams, Mount Baker, Mount Hood, Mount Jefferson, Mount Rainier, Mount Shasta, Mount St. Helens, Newberry, Three Sisters
Glacier Peak volcano viewed from the west, WA.
Glacier Peak volcano viewed from the west, Washington.
Glacier Peak volcano viewed from the west, Washington.
Geologists examining ash layers associated with the Dusty assemblag...
Geologists examining ash layers associated with the Dusty assemblag...The orange layer just below geologist's hiking pole is the Mazama ash (about 7700 ybp). Below that are glacial deposits. Above the Mazama is about a meter consisting mostly of fine-grained tephras from Glacier Peak, capped by soil and plants. That the tephras sit directly on top of the Mazama indicates that "Dusty" eruptions commenced about 7,000 years ago.
Geologists examining ash layers associated with the Dusty assemblag...
Geologists examining ash layers associated with the Dusty assemblag...The orange layer just below geologist's hiking pole is the Mazama ash (about 7700 ybp). Below that are glacial deposits. Above the Mazama is about a meter consisting mostly of fine-grained tephras from Glacier Peak, capped by soil and plants. That the tephras sit directly on top of the Mazama indicates that "Dusty" eruptions commenced about 7,000 years ago.
Ice-chilled lava columns at the end of a Glacier Peak lava flow, WA.
Ice-chilled lava columns at the end of a Glacier Peak lava flow, WA.Impressive columns like these form along the margins of ice-confined lava flows but usually are eroded off the sides due to continued glacial movement after an eruption ceases. Columns are better preserved at the ends of the flows (this photo) where they are protected somewhat from the ice.
Ice-chilled lava columns at the end of a Glacier Peak lava flow, WA.
Ice-chilled lava columns at the end of a Glacier Peak lava flow, WA.Impressive columns like these form along the margins of ice-confined lava flows but usually are eroded off the sides due to continued glacial movement after an eruption ceases. Columns are better preserved at the ends of the flows (this photo) where they are protected somewhat from the ice.
Eruptions in the Cascade Range during the past 4000 years. USGS GIP 64
Eruptions in the Cascade Range during the past 4000 years. USGS GIP 64Eruptions in the Cascade Range during the past 4000 years. USGS GIP 64
Eruptions in the Cascade Range during the past 4000 years. USGS GIP 64
Eruptions in the Cascade Range during the past 4000 years. USGS GIP 64Eruptions in the Cascade Range during the past 4000 years. USGS GIP 64
Videos
Status of (mostly) WA Volcanoes: Report to Emergency Managers 2020-21
Status of (mostly) WA Volcanoes: Report to Emergency Managers 2020-21Jon Major, scientist-in-charge of the USGS Cascades Volcano Observatory, provides an overview of the major volcano hazards in the Cascades, the function and responsibilities of the Cascades Volcano Observatory, and a brief synopsis of what's been going on at Mount Baker, Glacier Peak, Mount Rainier, Mount Adams, Mount St.
Status of (mostly) WA Volcanoes: Report to Emergency Managers 2020-21
Status of (mostly) WA Volcanoes: Report to Emergency Managers 2020-21Jon Major, scientist-in-charge of the USGS Cascades Volcano Observatory, provides an overview of the major volcano hazards in the Cascades, the function and responsibilities of the Cascades Volcano Observatory, and a brief synopsis of what's been going on at Mount Baker, Glacier Peak, Mount Rainier, Mount Adams, Mount St.
Mitigating Hazards at Cascade Range Volcanoes
The 1980 eruption of Mount St. Helens was monumental in so many different ways. It had a huge impact on the geography of southwestern Washington, ash affected many people, lives were lost, and lessons were learned. The eruption also led to the creation of the USGS Cascades Volcano Observatory in Vancouver, Washington.
The 1980 eruption of Mount St. Helens was monumental in so many different ways. It had a huge impact on the geography of southwestern Washington, ash affected many people, lives were lost, and lessons were learned. The eruption also led to the creation of the USGS Cascades Volcano Observatory in Vancouver, Washington.