Taxonomy term

gravity

Gravity changes may warn of large earthquakes

Large earthquakes alter the planet’s gravitational field by displacing big portions of the crust. In a new study looking at earthquake-induced gravity signals produced by Japan’s magnitude-9 Tohoku quake in 2011, researchers conclude that such signals may prove useful in earthquake early warning systems.

10 Mar 2017

Rethinking Pangea? Ancient ocean crust challenges supercontinent theory

The oldest piece of undisturbed oceanic crust ever discovered has been found beneath the eastern Mediterranean Sea, hidden under more than 10 kilometers of sediment. This ancient crust — estimated at up to 100 million years older than the oldest oceanic crust previously known — could reshape our view of global tectonics and the supercontinent cycle.

21 Dec 2016

Red Planet Roundup: July 2016

With two rovers patrolling the surface of Mars, five spacecraft orbiting above it, and scientists here on Earth studying the Red Planet from afar, new findings are announced often. Here are a few of the latest updates.

15 Jul 2016

A new gravity map of Earth

Gravity differs from place to place around Earth because of the uneven distribution of mass across and within the planet. Scientists can study the variation in gravitational pull by measuring the gravity field at different places on the surface of the planet. In a new study published in Scientific Reports, gravity field data collected over the entire planet between 2009 and 2013 by the European Space Agency’s Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) satellite has been mapped, revealing many of Earth’s internal features, such as magmatic plumes welling up toward the surface.

17 Jun 2016

Down to Earth With: Maria Zuber

In 2011, a pair of orbiters will launch for the moon, making some of the most exact measurements yet of our satellite. Luckily for the orbiters, they’ll have Maria Zuber at the helm. A geophysicist at MIT, Zuber was recently named one of “America’s Best Leaders” last year by U.S. News & World Report for her role in establishing women in high-level science. The moon orbiters alone will make her one of the first women to lead a NASA robotic space mission. Recently, Zuber talked with EARTH reporter Brian Fisher Johnson about the mission, leadership and saving the economy.

23 Mar 2009