Since their first implementation in Mexico and Japan, earthquake early-warning (EEW) systems have provided critical advance ...

A new kind of earthquake has been detected in western Canada, one that shakes the ground slower and longer than typical seismic events. These earthquakes, recorded during hydraulic fracturing for oil ...

There are actually several types of seismic waves released by earthquakes, and each behaves a bit differently. The P-wave (P for “primary” because it’s the first to arrive) ...

Seismic waves can be generated naturally, during earthquakes and volcanic eruptions, for example, or by artificial means such as explosions. There are two major types of seismic waves: surface ...

Different types and structures of minerals, as well as different amounts of liquid in the subsurface, can change the speed of seismic waves traveling through Earth, offering clues to the makeup of ...

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 ...

Changes in seismic wave speed and direction can result from gradual variations in rock temperature or density, for example. Mars’ seismic waves also hint at the thickness of the planet’s crust.

Since then, researchers have built invisibility cloaks for a wide range of different waves in the electromagnetic spectrum and beyond. In 2012, they suggested that seismic invisibility cloaks ...

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 ...