NASA's InSight Mars lander has recorded its first “marsquake,” making waves among Earthling seismologists tens of millions of miles away and kicking off a new era in our study of the red planet.

The faint signal, which came on April 6, is the first tremble that scientists believe comes from the Martian interior, rather than from surface forces, such as wind. But researchers are still studying the data to pin down the quake's precise source.

The detected waves are fairly small and seem to correspond to a magnitude 2 or 2.5 quake, which would barely be perceptible on Earth's surface. But this tiny tremor marks a momentous moment for InSight scientists, who have waited for this day since the installation of