In 2021 and 2022, NASA’s InSight lander picked up the tremors coming from the depths of Mars. These Marsquakes were quickly ...

Traveling through the interior of the Earth, body waves arrive before the surface waves emitted by an earthquake. These waves are higher frequency than surface waves. P waves are also known as ...

known as primary waves (P-waves), secondary waves (S-waves), and various types of surface waves. P-waves travel at roughly 5-8 kilometers per second, around 1.7 times faster than S-waves ...

This helps the system to more quickly identify trains that should be stopped before the arrival of S waves, or secondary waves, which are much more powerful and destructive. It took an average of ...