In this lesson, students learn about different types of seismic waves on the basis of where and how the waves move. In addition, students discuss how scientists use earthquake waves to investigate ...

A phase change in post-perovskite materials at the so-called D” discontinuity is also evidence for long-predicted slow, convective flows in the mantle itself ...

A Comparison of Seismic Design Methods. There are basically four different types of seismic design methods. Most building designers immediately assume that the building code provides the best seismic ...

These mysterious waves, known as PKP precursors, arrive just before a type of seismic wave known as PKP waves, ... And we can compare that to the real recordings that we have," Thorne said.

A new kind of earthquake has been detected in western Canada, one that shakes the ground slower and longer than typical ...

There are actually several types of seismic waves released by earthquakes, and each behaves a bit ... The researchers compare it to estimates from the automated Argo array of floats and to NASA ...

As their names suggest, ULVZs slow down seismic waves, and scientists have known about these strange areas that tend to hang around hotspots, which are regions where mantle wells up through the ...

A massive explosion in Beirut, Lebanon, sent shock waves across the ground, triggering an estimated magnitude 3.3-4.5 earthquake.

There are three types of seismic waves – P waves, S waves and surface waves. P waves are longitudinal waves, and their relative speed is faster than other waves.

Seismic wave data has revealed giant structures 2900 kilometres beneath the surface of Earth, at the boundary between Earth’s molten core and solid mantle.. Analysing data from hundreds of major ...

As seismic waves travel, they slow or speed up depending on the density, temperature and type of rock. For example, they slow down when traveling through an underground aquifer or magma. By combining ...

Blowing up: a powerful extratropical cyclone east of Japan in January 2013. (Courtesy: NASA) A new type of rare deep-Earth tremor, created by fast-developing ocean storms, has been detected by ...