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J. B. Johnson

On 3 March 2015, Villarrica volcano near Pucón, Chile, erupted briefly but violently, for the first time in 30 years.
Posted inScience Updates

Monitoring Volcanic Craters with Infrasound “Music”

by J. B. Johnson and L. M. Watson 17 June 20195 October 2021

Volcanic craters act as giant horns that emit intense low-frequency sounds. Changes in this infrasound may be used to track rising lava lakes and identify signals of future eruptions.

View of typical Santiaguito explosion as seen from the summit of Santa Maria.
Posted inScience Updates

Visiting the Volcano

by J. B. Johnson, B. Andrews and R. Escobar-Wolf 2 May 20165 June 2023

Workshops on Volcanoes; Santiaguito, Guatemala, 4–12 January 2016

A view of a Washington, D.C., skyline from the Potomac River at night. The Lincoln Memorial (at left) and the Washington Monument (at right) are lit against a purple sky. Over the water of the Potomac appear the text “#AGU24 coverage from Eos.”

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