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Alaska

The source and upper track of the Pedersen Lagoon landslide.
Posted inThe Landslide Blog

The 7 August 2024 Pedersen Lagoon landslide and tsunami

by Dave Petley 22 August 202422 August 2024

The Landslide Blog is written by Dave Petley, who is widely recognized as a world leader in the study and management of landslides. At about 5 am local time on 7 August 2024, a large landslide occurred on the rock slopes above Pedersen Lagoon in Alaska, triggering a local tsunami. Whilst this major event is […]

Clouds off California’s coast, captured by the Moderate Resolution Imaging Spectroradiometer (MODIS)
Posted inNews

Cloud Brightening Could Have Unintended Effects in a Warming World

Rishika Pardikar, Science Writer by Rishika Pardikar 31 July 202431 July 2024

New research shows that though marine cloud brightening holds potential to temporarily reduce heat stress regionally, the technique has unpredictable and far-reaching outcomes.

A flooded airport runway on a cloudy day.
Posted inNews

More than a Third of Coastal Alaska Structures May Be at Risk of Flooding by 2100

by Grace van Deelen 12 June 202412 June 2024

A new analysis of flood exposure shows many residential buildings at risk as sea levels rise.

Graph from the paper.
Posted inEditors' Highlights

Repeated Coseismic Uplift Above the Patton Bay Splay Fault, Alaska

by Daniel Melnick 30 May 20243 June 2024

Stratigraphic and diatom analyses suggest ruptures of the Patton Bay splay fault occurred together with half of the documented great Alaskan megathrust earthquakes during the past 4,200 years.

A glacier between two dark-colored mountains. A snowy mountain reaching up into the clouds is in the background, and blue seawater is in the foreground.
Posted inResearch Spotlights

A Million Years Without a Megaslide

by Rebecca Owen 19 April 202419 April 2024

A new study goes deep into the Gulf of Alaska to examine the sixth-largest underwater landslide and investigate why a similar event hasn’t happened since.

A river cuts through a valley in Alaska in summer.
Posted inNews

Climate Change Is Weakening River Seasonality in the North

by Grace van Deelen 13 March 202414 March 2024

Seasonal flow variability is decreasing as climate change alters Earth’s systems, creating challenges for water management.

A bald eagle perches on a lichen and moss-covered branch sticking out of a large tree trunk, with pine trees visible in the background.
Posted inResearch Spotlights

To Meet Climate Goals, Protect the Tongass and Chugach Forests

Rachel Fritts, Science Writer by Rachel Fritts 22 November 20231 December 2023

The two largest U.S. national forests, both in Alaska, have low wildfire risk and provide crucial forest carbon stocks and biodiversity benefits.

Posted inThe Landslide Blog

The deadly 20 November 2023 landslide near Wrangell in Alaska, USA

by Dave Petley 22 November 202322 November 2023

The Landslide Blog is written by Dave Petley, who is widely recognized as a world leader in the study and management of landslides. At about 9 pm local time on 20 November 2023, a large landslide occurred near to Wrangell in Alaska, USA. At the time of writing, three people have been confirmed to have […]

A man wearing a blue life vest stands knee deep in water to collect a water sample downstream of the large glacier in the background.
Posted inResearch Spotlights

Measuring Carbon’s Flow from Land to Sea

by Rebecca Owen 21 November 202321 November 2023

A new study catalogs how dissolved inorganic carbon moves through southeast Alaska’s waterways.

Map of study area with symbols.
Posted inEditors' Highlights

Machine Learning Identifies Source Volcanoes of Ash Deposits

by Paul Asimow 8 November 20236 November 2023

Tracing ash layers from explosive eruptions back to their source volcanoes is needed to evaluate hazards to population and aviation, a problem addressed by a new machine learning classification method.

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