The planet doesn't have tectonic plates like Earth, but it does have volcanically active regions that can cause rumbles. The March 7 and March 18 quakes add weight to the idea that Cerberus Fossae is a center of seismic activity.

Why is Mars seismically active?

A marsquake is a quake which, much like an earthquake, would be a shaking of the surface or interior of the planet Mars as a result of the sudden release of energy in the planet's interior, such as the result of plate tectonics, which most quakes on Earth originate from, or possibly from hotspots such as Olympus Mons ...

Does Mars have any seismic activity?

NASA says Mars does not have tectonic activity like that on Earth, but it does have volcanically active regions that cause rumbles. Now, with the addition of these two powerful Mars-quakes, NASA scientists hypothesize the Cerberus Fossae as the center of seismic activity.