In Photos: Etna Volcano

Volcanic vortex rings emerge from a new pit crater on the north side of the southeast crater of the Etna Volcano in Sicily, Italy.

Volcanic vortex rings emerge from a new pit crater on the north side of the southeast crater of the Etna Volcano in Sicily, Italy.

Volcanic vortex rings emerge from a new pit crater on the north side of the southeast crater of the Etna Volcano in Sicily, Italy.

People look at volcanic vortex rings emerging from a new pit crater on the north side of the southeast crater of the Etna Volcano in Sicily, Italy.

A volcanic vortex ring emerges from a new pit crater on the north side of the southeast crater of the Etna Volcano in Sicily, Italy.

Volcanic vortex rings emerge from a new pit crater on the north side of the southeast crater of the Etna Volcano in Sicily, Italy.

People look at volcanic vortex rings emerging from a new pit crater on the north side of the southeast crater of the Etna Volcano in Sicily, Italy.