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Cascades

A river of molten lava flows across a steaming black basalt landscape. The river flows from a volcanic rift near the top right of the image toward the bottom left. The fissure is filled with brighter and hotter lava and steam and gas billows up from it. The sky on the horizon is a hazy blue-gray.
Posted inNews

The Surprising Greenhouse Gas That Caused Volcanic Summer

by Kimberly M. S. Cartier 21 March 202212 April 2022

Extended periods of volcanism known as flood basalt eruptions lead to volcanic winters, which are often followed by an extended period of warming. But it was more than just carbon dioxide that warmed the globe.

Posted inEditors' Highlights

Continent-Scale Detection of Triggered Low Frequency Earthquakes

by Thorsten Becker 10 March 202212 April 2022

Very low frequency events in the gap zone of Cascadia illustrate how stress evolves on megathrusts, advancing our understanding of rupture dynamics.

Aerial view of snowcapped Mount Hood with lower-lying mountains and fog in the background
Posted inScience Updates

Making the Most of Volcanic Eruption Responses

by T. P. Fischer, S. C. Moran, K. M. Cooper, D. C. Roman and P. C. LaFemina 31 August 202122 March 2022

Last year, a new collaborative initiative conducted a hypothetical volcano response exercise. A month later, they put the knowledge gained to use during an actual eruption.

Dead tree trunks and stumps stand along a shoreline
Posted inScience Updates

Swipe Left on the “Big One”: Better Dates for Cascadia Quakes

by J. K. Pearl and L. Staisch 20 August 202111 May 2022

Improving our understanding of hazards posed by future large earthquakes on the Cascadia Subduction Zone requires advancements in the methods and sampling used to date and characterize past events.

View up a 95-meter-long debris flow flume facility, with cameras and other instruments in the foreground
Posted inScience Updates

A New Era of Debris Flow Experiments in the Oregon Woods

by M. K. Obryk, D. L. George and B. B. Mirus 26 January 202129 September 2021

What do a backhoe, expanding foam, half-ton concrete blocks, and a 100-meter-long hillslope slide have in common? All were part of reviving the U.S. Geological Survey’s experimental debris flow flume.

A beach scene along the Oregon coast
Posted inResearch Spotlights

Land Motion Offers Insights into Cascadia Earthquake Cycle

by David Shultz 7 July 202029 September 2021

Comparing recent GPS data with a longer record of sea level along the western coast of North America allows researchers to home in on interseismic deformation above the Cascadia megathrust.

A scientist surveys a smoking Mount St. Helens in a wintry landscape.
Posted inNews

An Iconic Eruption Shaped Careers, as well as Landscapes

by Jane Palmer 26 May 202012 April 2022

The 1980 eruption of Mount St. Helens influenced scientists who witnessed the event and spurred a new era in physical volcanology.

A view looking southeast toward Mount St. Helens from the Castle Lake Viewpoint in June 2017
Posted inFeatures

Lessons from a Post-Eruption Landscape

by J. J. Major, C. M. Crisafulli and F. J. Swanson 24 April 202012 April 2022

Four decades of research into biophysical responses to the 1980 eruption of Mount St. Helens have vastly improved our understanding of how landscapes react to cataclysmic disturbances.

Shadows of girls hiking in a line
Posted inNews

GeoGirls: Confidence Erupts from a Camp at a Volcano

by Lesley Evans Ogden 22 April 202012 April 2022

Summer camp at Mount Saint Helens empowers girls with science, confidence, and fun.

Two brothers equipped with backpacks and ice axes stand on the summit of Mount Adams (3,743 meters), admiring their next objective: Mount Rainier (4,392 meters), the tallest and most challenging of the Cascade volcanoes.
Posted inFeatures

Climbing the Occasionally Cataclysmic Cascades

by Mary Caperton Morton 27 February 202010 May 2022

Living in Geologic Time: Every one of the Pacific Northwest’s volatile volcanoes is likely to erupt again before the range goes extinct.

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