For instance, seismic waves carry energy from the source of the shaking outward in all directions (not in one direction only as the setup shows). 7. (Optional) Both primary and secondary waves are ...

Millions of people across Southern California learned about a 5.2-magnitude earthquake that hit San Diego County on Monday not from their windows rattling or their picture frames clattering, but from ...

There are mainly two types of seismic waves – P-waves (Primary waves) and S-waves (Secondary waves). P-waves are the fastest and are felt first. They cause straight-line vibrations on the Earth.

Seismic waves from earthquakes have always offered a window into Earth’s hidden interior. For decades, researchers believed they had a firm grasp on how these waves revealed the rocky mantle’s ...

Tiny ocean wave vibrations from the Gulf of Alaska — too subtle for humans to notice — can travel through land as far north ...

Using artificial seismic waves, the team determined that the top of the chamber is 3.8 kilometers, or about 12,500 feet, below Earth's surface, and it is sharply delineated from the rock strata ...