Which volcanoes threaten major United States cities?

Volcanoes located near densely populated regions in the United States pose significant threats due to their potential for destructive eruptions and proximity to growing cities. Major urban centers in the Pacific Northwest, such as Seattle, Tacoma, and Portland, lie near the Cascade Volcanoes. Among these, Mount Rainier is designated as a Decade Volcano because of the severe danger it presents to nearby metropolitan areas.

What we know

• The Cascade Volcanoes extend through Washington and Oregon, with major cities like Portland, Seattle, and Vancouver located along the length of the arc. [3]
• Mount Rainier is identified as a Decade Volcano due to the danger it poses to Seattle and Tacoma. [3]
• Decade Volcanoes are selected by the IAVCEI because of their history of large, destructive eruptions and their proximity to densely populated areas. [2]
• People living near Decade Volcanoes may experience hazards such as tephra fall, pyroclastic flows, lava flows, lahars, and volcanic edifice instability. [2]

Where to go next

• how it workedHow does subduction form the Cascade Volcanoes?
• a case in pointWhat are all the locations of the 16 Decade Volcanoes?
• what followedWhat hazards do lahars and pyroclastic flows pose to cities?
• the bigger pictureWhat is the history of the Pacific Ring of Fire?
• whenWhen did Mount St. Helens last erupt?
• an unexpected connectionHow do United Nations initiatives connect to active volcano research?The Decade Volcanoes project was established under the sponsorship of the United Nations to focus scientific study on dangerous volcanoes near populated areas.

Sources

• [1]Decade Volcanoes (Wikidata Q2122218) · CC0 1.0
• [2]Decade Volcanoes · CC BY-SA 4.0
• [3]Cascade Volcanoes · CC BY-SA 4.0
• [4]List of volcanoes in the United States · CC BY-SA 4.0
• [5]Volcano · CC BY-SA 4.0