NASA's newest Mars lander has confirmed that quakes and even aftershocks are regularly jolting the red planet.
Scientists reported Monday that the seismometer from the InSight spacecraft has detected scores of marsquakes.
A series of research papers focus on the 174 marsquakes noted through last September. Twenty-four were relatively strong – magnitude 3 to 4 – and apparently stemmed from distant underground triggers. The rest were smaller, with uncertain magnitude and origin. Even the stronger quakes would not have posed a hazard to anybody on the planet's surface, researchers said in a news conference.