Though the volcano’s magma chambers could hold enough material for a caldera-forming event, none of them are likely to erupt soon.

Loki Patera is 202 kilometres (126 mi) in diameter, covers 20,000 sq km (7,700 sq mi), and was the largest volcanic feature found on Io until these new observations revealed the hot spot in the south ...

Surprisingly, fascinating Pu'ukoholā Heiau National Historic Site in Hawaii is one of the least visited National Park Service units in the country ...