Earth Sciences

Following two large meteorite impacts on Mars, researchers have observed, for the first time, seismic waves propagating along the surface of a planet other than Earth. The data from the marsquakes was recorded by NASA’s InSight lander and analysed at ETH Zurich in collaboration with the InSight Science Team. It provides new insights into the structure of the Martian crust.

Until now, Mars has been generally considered a geologically dead planet. An international team of researchers led by ETH Zurich now reports that seismic signals indicate vulcanism still plays an active role in shaping the Martian surface.

ETH Zurich is opening a new research and teaching centre with a focus on exploring the origin and prevalence of life on Earth and beyond. Under the leadership of Noble Laureate, Didier Queloz, more than 40 research groups from five departments will address the big questions posed by humankind.

An international research team led by ETH Zurich proposes a new theory for the Earth’s formation. It may also show how other rocky planets were formed. (Image: ETH Zurich)

How the plates of the Earth’s crust move depends largely on the behaviour of the rocks below them in the mantle. A new ETH study now shows that the grain size of these rocks is a key factor.

The InSight mission on Mars is running out of power and most of its functions could be shut down in the months to come. Some have already been deactivated. However, the attached seismometer, SEIS, will remain in operation for as long as possible. ETH Professor Domenico Giardini takes stock of three years of marsquake measurements.