The earliest scientists first observed the waves that earthquakes produce before they could accurately describe the nature of earthquakes or their fundamental causes, as discussed in Lessons 1–5.

Geophysics has shown that precise measurements and a little modeling can perform wonders, like showing us the detailed structure of the Earth’s interior despite the fact that it is inaccessibly buried ...

Figure 2. A diagram showing how different seismic waves travel across Mars. Credit: Ikuo Katayama For example, S-waves cannot travel through water and move at a slower speed than P-waves. Therefore, ...

Widespread global lockdowns resulting from the COVID-19 pandemic reduced the amount of seismic noise produced by humans by up to 50 percent in some places, a new study finds. This 2020 seismic noise ...