Since 2018, NASA's InSight mission to Mars has recorded seismic waves from more than 1,300 marsquakes ... the US Apollo missions of the 1960s and '70s. However, there was no recording of a natural ...

But mysterious earthquake waves suggest that these features might be widespread. ULVZs, which are located in the lower mantle near the core-mantle boundary, can slow seismic waves by up to 50%.

Seismic waves from one of those earthquakes ... such as a moderate speed of about 70 millimeters per year," he added. "In other words, we think our study could offer a reasonable lower bound ...

Scientists like me use the seismic waves created by earthquakes as a kind of ultrasound to “see” the shape and structure of the core. Using a new way of studying these waves, my colleague ...