Volcanoes are one of the most important geological forces on the planet. Their activity can halt air travel, impact air quality, force evacuations and damage communities. It isn’t currently possible to predict when one might blow or for how long. But there are important indicators, including changes in seismic activity, temperature, gas emissions and the shape of the ground, that can alert researchers whether a volcano may be shifting from dormant into a more explosive mode, scientists say.

Source: Wall Street Journal August 12, 2020 18:33 UTC