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Cascades

In the background, snow-capped Mount Hood rises above a mountain range. In the foreground, the skyscrapers of Portland, Ore., dominate the landscape.
Posted inResearch Spotlights

Some High-Threat Volcanoes Are Severely Understudied

by Saima May Sidik 29 November 202329 November 2023

Scientists have little understanding of where magma is stored along the Cascade Volcanic Arc or how its volcanoes could affect population centers.

Una vista de la Space Needle de Seattle y sus alrededores con una bahía al fondo.
Posted inNews

Revolucionando la ciencia de los terremotos en Cascadia

by Caroline Hasler 7 November 20237 November 2023

Un nuevo centro reunirá a científicos de sismos para estudiar la zona de subducción de Cascadia y aclarar los peligros sísmicos.

A view of the Seattle’s Space Needle and surrounding area with a bay in the background
Posted inNews

Shaking Up Earthquake Science in Cascadia

by Caroline Hasler 16 October 20237 November 2023

A new center will bring together earthquake scientists to study the Cascadia Subduction Zone and clarify seismic hazards.

View of steep hills with exposures of dark rock as well as patches of green vegetation
Posted inFeatures

Baked Contacts Focus a Lens on Ancient Lava Flows

by Anthony Pivarunas, Margaret Avery, Joseph Biasi and Leif Karlstrom 1 February 202325 May 2023

Two studies, conducted 40 years apart, show how combining field observations and thermal modeling can reconstruct the history of massive lava flows and how they altered the surrounding landscape.

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

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org 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.

Time series of the vertical daily average displacement of continuous GNSS station.
Posted inEditors' Highlights

Continuity is the Father of Success

by Yosuke Aoki 15 February 202215 November 2022

Geodetic measurements indicate that Three Sisters Volcano uplifted by almost 300 millimeters in the past 25 years without significant anomalies at the surface.

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 202114 March 2024

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.

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Over a dark blue-green square appear the words Special Report: The State of the Science 1 Year On.

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13 August 202613 August 2026
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Introducing Research Letters in Paleoceanography and Paleoclimatology

12 August 202610 August 2026
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