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California

Posted inResearch Spotlights

Dating Lava Domes in California's Salton Trough

by Terri Cook 10 November 20159 May 2023

Scientists use a trio of techniques to resolve the age and duration of rhyolite volcanism of the Salton Buttes.

Posted inResearch Spotlights

Extracting New Meaning from Seismological Data

by C. Minnehan 9 November 201511 May 2022

Scientists use noise data collected at the Long Beach dense array to measure elusive high-frequency surface waves.

Posted inNews

Researchers Track Underwater Avalanches Like Never Before

Cody Sullivan by C. Sullivan 3 November 201521 February 2023

Using beach ball–like detectors, researchers set out to determine how sediments, which could contain toxic contaminants, travel through submarine canyons to greater depths.

Posted inNews

This Winter's El Niño Might Only Dent Western U.S. Drought

Cody Sullivan by C. Sullivan 16 October 20152 May 2023

The National Oceanic and Atmospheric Administration released its winter weather outlook, which predicts a warm and wet winter in California but not enough rain to eliminate the state's pernicious drought.

Posted inResearch Spotlights

Global Warming Intensifies Drought Conditions in California

by L. Strelich 26 August 20153 March 2023

The rise in global temperatures has amplified naturally occurring drought conditions in California and has increased the chance of severe droughts in the future.

Posted inResearch Spotlights

Urbanization Threatens Drought-Reducing Clouds in California

by C. Palmer 16 July 201528 October 2022

Since the mid-20th century, increased urbanization along the southern California coast has raised nighttime temperatures, resulting in less morning fog and cloud cover.

Posted inResearch Spotlights

California's 2012–2014 Drought Unusual for Last Millennium

by P. Kollipara 3 April 201521 October 2021

Soil moisture estimates, inferred from thousands of tree rings spanning the past 12 centuries, highlight the severity of the recent record-breaking drought.

Posted inNews

Satellites Show True Extent of California Drought

by N. Weiler 18 December 201410 September 2025

Since 2011, California’s water supply has lost 4 trillion gallons per year and the Sierra Nevada snowpack has hit record lows.

Posted inResearch Spotlights

River Slope Connects Modern Topography with Ancient Tectonics

JoAnna Wendel, freelance science writer and illustrator by JoAnna Wendel 10 December 201410 February 2023

Scientists create models to help them figure out how the slope of a river can record ancient tectonic activity.

Posted inScience Updates

Reducing Rockfall Risk in Yosemite National Park

by G. M. Stock and B. D. Collins 22 July 20143 November 2022

Rockfalls from steep cliffs pose great hazards to the millions who visit Yosemite Valley each year. Armed with new studies, the National Park Service recently took steps to enhance visitors’ safety.

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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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