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L. O’Hanlon

Traditional low-tech compass on a geologic map
Posted inResearch Spotlights

Using Cell Phones as Space Weather Vanes

by L. O’Hanlon 14 May 202113 October 2021

Tiny magnetometers have turned your phone into a compass, and new research shows they are sensitive to geomagnetic storms.

Ilustración que ejemplifica la Cuenca del Valle de México, los diferentes componentes del subsuelo, líneas que indican el nivel de subsidencia y las direcciones de los flujos de recarga del acuífero al 2020
Posted inResearch Spotlights

La inminente crisis del hundimiento del suelo en la Ciudad de México

by L. O’Hanlon 12 May 20219 May 2023

Una nueva investigación revela la causa del rápido hundimiento y fracturación del suelo de la Ciudad de México.

Solar eclipse enthusiasts gather for the 26 February 1979 total solar eclipse in Goldendale, Wash.
Posted inNews

Small Towns Brace for Historic Eclipse Crowds

JoAnna Wendel, freelance science writer and illustrator by JoAnna Wendel and L. O’Hanlon 15 August 201725 October 2022

Some towns have known for a decade to prepare; others learned as little as a year ago about the event and what it might bring to their locale.

Posted inNews

Seeing the Gravitational Waves, Despite the Seismic Waves

by L. O’Hanlon 17 February 20168 February 2023

For detectors to sense the minute jolt of a gravitational wave announced last week, savvy geophysicists and engineers had to keep Earth's tiniest jiggles from reaching ultrasensitive instruments.

Posted inAGU News

What's New in the AGU Blogosphere

by L. O’Hanlon 2 June 20155 May 2023

Two new blogs—one focused on Mars and the other on glaciers—join AGU's lineup.

Posted inAGU News

Fall Meeting Erupts on Twitter

by L. O’Hanlon 10 February 201530 August 2022

Close to a half billion times during the 2014 Fall Meeting, somebody, somewhere, received a tweet about the American Geophysical Union.

Posted inNews

Smartphone App Seeks to Make Navigation Safer

by L. O’Hanlon 6 January 20155 May 2022

The app sends local magnetic field strength along with your phone’s position and orientation to scientists, who use the data to fine-tune magnetic field models.

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.”

Features from AGU Publications

Research Spotlights

Proposed Experiment Could Clarify Origin of Martian Methane

12 May 202512 May 2025
Editors' Highlights

First Benchmarking System of Global Hydrological Models

7 May 20257 May 2025
Editors' Vox

Decoding Crop Evapotranspiration

6 May 20256 May 2025
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