Spacewatch: Nasa lander detects first signals of possible marsquakes

If confirmed, faint signals would be first detection of seismic activity on Mars

Nasa's InSight Mars lander has detected signals of what could have been a marsquake. The signals were recorded on 6 April and if confirmed would be the first detection of seismic activity on Mars.

Although the signals are only faint, they fit the profile of moonquakes that were detected with seismometers left on the lunar surface by the Apollo astronauts 50 years ago. The apparent marsquake produced readings that were bigger than the shaking of the spacecraft due to the martian wind, but smaller than the vibrations caused by the movement of the spacecraft's robotic arm.