GEOLOGY

Detailed explanation-1: -These rarely make trouble. But studying the earthquakes that accompany low-level eruptions can provide a wealth of data for scientists, offering important clues about volcanic behavior and, ultimately, better ways to predict when major eruptions might occur.

Detailed explanation-2: -Just like earthquakes, predicting exactly when an individual volcano will erupt-and exactly how large that eruption will be-is still impossible. But deposits left by past eruptions, along with live data from volcanoes around the world, might help volcanologists make better forecasts.

Detailed explanation-3: -Seismic Monitors An increase in earthquakes can be a sign of an impending eruption. Researchers use seismic monitors to track the many small tremors that occur around a volcano. Modern seismometers can record the intensity, escalation, and epicenters of earthquakes.

Detailed explanation-4: -GPS also helps us understand how magmatic systems work so that we may better plan for eruptions. Combining GPS with seismicity, gas emissions, and changes in water chemistry around the volcano paints an even better picture of what is going on below the surface. Figure 3.