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California

Comparison of two mussel beds, one in 1984 and one in 2023
Posted inNews

Ocean Warming Is Wiping Out Southern California’s Mussel Beds

by Madeline Reinsel 14 December 202314 December 2023

Historic photographs reveal the dramatic retreat of mollusks as warmer waters take a toll on the health of the intertidal zone.

An aerial view of water being released down the spillway of the Coyote Valley Dam, with a large earthen berm in the background
Posted inNews

Weather and Watershed Forecasting Make for Dam Smart Water Use

by Nicole Choi 13 December 202330 January 2024

Using weather forecasts in reservoir management improves decisions about water supplies. Now researchers are studying the hydrology around reservoirs to help apply this strategy nationwide.

A firefighter stands in front of burning grass and trees.
Posted inNews

Climate Change Narrows the Window for Prescribed Fires

by Caroline Hasler 16 November 202316 November 2023

Longer, drier summers may mean fewer opportunities for firefighters to safely burn would-be wildfire fuel in the western United States.

Field photos and elevation diagram of study area.
Posted inEditors' Highlights

Revealing a Catchment’s Erosional Secrets: Grain Size Matters

by Mikaël Attal 15 November 202313 November 2023

A provenance study with 699 new samples from 12 different sediment grain sizes (from sand to boulder) shows that each fraction originates from distinct parts of a mountain catchment in California.

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.

A large forest fire burns on a mountainside.
Posted inNews

Natural Nitrogen Emissions Are Rising in California

by Nathaniel Scharping 13 October 202313 October 2023

Wildfires and soil microbes are releasing more nitrogen oxides in California as the climate gets warmer and drier.

Map and 2 graphs form the paper
Posted inEditors' Highlights

Earthquakes Have Preparatory Stage Years Before Rupture

by Victor Tsai 29 September 202329 September 2023

Tidally induced seismicity increased locally before the 2019 Ridgecrest earthquake, suggesting that fault sensitivity to stress increases in the years immediately before large earthquakes.

Photo of a scientist with a group of students in a lab.
Posted inEditors' Vox

One Solution to the Climate Crisis: Better High School Education

by Michael Wysession 24 August 202323 August 2023

Integrating Earth and space science into high school biology, chemistry, and physics courses may be the best way to educate the public about climate science.

A debris flow triggered by Storm Hilary in Forest Falls, California. Still from a video posted to Twitter.
Posted inThe Landslide Blog

Mudslides and debris flows triggered by Storm Hilary

by Dave Petley 22 August 202322 August 2023

Videos of debris flows and mudflows from Storm Hilary.

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A view of a bridge, with the New Orleans skyline visible in the distance between the bridge and the water. A purple tint, a teal curved line representing a river, and the text “#AGU25 coverage from Eos” overlie the photo.

Features from AGU Publications

Research Spotlights

New River Chemistry Insights May Boost Coastal Ocean Modeling

9 January 20269 January 2026
Editors' Highlights

Central China Water Towers Provide Stable Water Resources Under Change

9 January 20269 January 2026
Editors' Vox

Hydrothermal Circulation and Its Impact on the Earth System

3 December 20253 December 2025
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