California's earthquake early-warning system sounded three seconds before a 4.4-magnitude quake shook Los Angeles County Tuesday night. The so-called ShakeAlert system, under development by the U.S.

No audio available for this content. Scientists at Japan’s Nagoya University have used Japan’s extensive network of GNSS receivers to create the first 3D images of atmospheric disturbances caused by ...

Earthquakes create ripple effects in Earth's upper atmosphere that can disrupt satellite communications and navigation systems we rely on. Scientists have now used Japan's extensive network of Global ...

Residents across Nevada and California were startled Thursday when their phones erupted with an earthquake alert warning of a powerful 5.9 magnitude. The US Geological Survey (USGS) issued the warning ...

Did your phone light up Thursday morning with an earthquake alert? Good news: There was no quake. The ShakeAlert early warning system that notifies people about earthquakes as they are occurring ...