Strong strombolian activity and ash emissions at Etna volcano, Italy - The Watchers

The sixth seal describes cosmic disturbances including great earthquakes and environmental upheaval. Volcanic activity at Mount Etna—a major geological event producing ash emissions and environmental impact—aligns thematically with the 'cosmic signs' and natural disasters prophesied as precursors to end-times judgment, though this is a partial thematic match rather than direct fulfillment.