Studies of ‘Marsquakes’ reveal the red planet’s metallic innards
Studies of ‘Marsquakes’ reveal the red planet’s metallic innards Who knew it had such a massive metallic core? Metallic heart It’s impossible to get a sample of Mars’s core. Instead, to estimate its size, we used seismic waves (created by marsquakes). On Earth, the core’s radius was first estimated by finding its “shadow” – an area where the core disrupts the arrival of seismic waves from distant earthquakes.Our studyhad to rely on a particular kind of slow, sideways-travelling waves called S-waves which have been reflected back to the surface by the interface between the core and the mantle....
