Complex sentence: They are also in the forefront of natural hazards and disasters warning and mitigation, studying earthquakes, volcanic activity, tsunamis, weather storms, and the like; their studies are used to warn the general public of the occurrence of these events.
Split into simpler sentences: They are also in the forefront of natural hazards and disasters prevention and mitigation, studying natural hazards such as earthquakes, volcanic activity, tsunamis, weather storms. Their studies are used to warn the general public of the occurrence of these events.