Essentially, gas pistoning is a shallow, degassing-driven rise and fall of a lava surface. Often these pistons occur in ...

As scientists scramble to understand the cause, officials are urging residents to brace for the worst, and the rest of Japan to take this as a grim reminder of its ever-present seismic vulnerability.

A small earthquake struck off the coast of Isla Vista on Thursday morning. It was 2.7 magnitudes, approximately 6 miles off the coast.