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California

Sandhill cranes fly through the tule fog in the Merced National Wildlife Refuge
Posted inResearch Spotlights

Fading Air Pollution Reduces Fog in Central Valley

Aaron Sidder, freelance science writer by Aaron Sidder 12 June 20197 February 2024

The tule fog in California’s Central Valley is notorious for causing delays and accidents throughout the region; however, a decrease in air pollutants is reducing the fog’s frequency.

The Bishop Tuff in California
Posted inResearch Spotlights

Paleomagnetism Indicators May Be Flawed

Aaron Sidder, freelance science writer by Aaron Sidder 3 June 201914 March 2023

A new study finds that magnetism in volcanic ash tuff forms through varied processes, calling into question previously reliable signatures used to study variations in Earth’s magnetic field.

The south fork of the Eel River in California
Posted inResearch Spotlights

Answer to California Landscape Riddle Lies Underground

Elizabeth Thompson by Elizabeth Thompson 30 May 201915 November 2021

Scientists link vegetation mosaics in California to patterns of weathered bedrock.

An almond orchard with trees in bloom
Posted inNews

California Heat Waves Triggered by Pacific Thunderstorms

Mary Caperton Morton, Science Writer by Mary Caperton Morton 29 April 201930 March 2023

New link may offer 5-week lead time on predicting extreme heat in California’s fruit belt.

Victorian-style houses lean dramatically to the right after an earthquake.
Posted inNews

More Than a Million New Earthquakes Spotted in Archival Data

Katherine Kornei, Science Writer by Katherine Kornei 19 April 20195 December 2022

By reanalyzing seismic records, researchers found a plethora of tiny earthquakes in Southern California that trace new fault structures and reveal how earthquakes are triggered.

A man kneels next to a road cracked by the 1928 San Jacinto earthquake.
Posted inNews

Reassessing California’s Overdue Earthquake Tab

Mary Caperton Morton, Science Writer by Mary Caperton Morton 12 April 20196 October 2021

Paleoseismic records show that the current 100-year hiatus since the last major event on the San Andreas, San Jacinto, and Hayward Faults is unprecedented in recent geologic history.

A Twin Otter turboprop flies over California, taking measurements of smoke from a wildfire.
Posted inResearch Spotlights

Probing Wildfire Smoke Plumes Up Close

Sarah Stanley, Science Writer by Sarah Stanley 10 April 201919 September 2022

Direct observations from flights over coastal California reveal more about aerosol plumes released by burning biomass.

Eaton Canyon Falls in California’s San Gabriel Mountains
Posted inNews

Some Waterfalls May Be Self-Made

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 13 March 201927 April 2022

Waterfalls sometimes imply a past dramatic event, like tectonic uplift or a landslide. Self-formed waterfalls could challenge that interpretation.

Posted inEditors' Highlights

How Brown Carbon and Coatings on Black Carbon Affect Absorption

by Minghua Zhang 1 March 20193 May 2022

While ambient black carbon absorption is shown largely independent of coatings, distinct types of atmospheric brown carbon coexist, deriving from primary emissions and secondary processing.

Holuhraun lava field in Iceland in September 2014
Posted inFeatures

Earth’s Devastating Power, Seen by Satellite

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 25 January 20196 January 2023

Hurricanes, volcanoes, droughts, floods, fires, tsunamis: Satellites capture some of Earth’s most destructive forces.

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Research Spotlights

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16 July 202516 July 2025
Editors' Highlights

The Power of Naming Space Weather Events

10 July 20258 July 2025
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Water Tracks: The Veins of Thawing Landscapes

25 June 202525 June 2025
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