The first studies of seismic activity and ground vibrations on Mars are in. The red planet has a moderate level of seismic activity, intermediate between Earth and the Moon.
An international group that includes the University of Maryland geologists issued preliminary outcomes from the InSight mission, which landed an inquiry on Mars on November 26, 2018. Data from the mission’s Seismic Experiment for Interior Structure (SEIS) supplied the first direct seismic measurements of the Martian subsurface and upper shell—the rocky external layer of the planet. The results had been printed in a special issue of the journal Nature Geoscience on February 24.
The seismic information obtained over 235 Martian days showed 174 seismic events. Of those, 150 had been high-frequency events that produce ground-shaking similar to that registered on the Moon by the Apollo program. Their waveforms show that seismic waves bounce around as they travel via the heterogeneous and fractured Martian crust.
The other 24 quakes noticed by SEIS had been predominantly low-frequency events. Three confirmed two distinct wave patterns similar to quakes on Earth caused by the movement of tectonic plates.
The researchers recognized the source location and magnitude of three of the low-frequency marsquakes, and believe that 10 extra are sturdy enough to reveal their source and magnitude as soon as they’re studied.