Many of the world’s biggest earthquakes, volcanic eruptions and tsunamis occur along a chain of seismologically active ...

Mount Paektu, an active stratovolcano straddling the border of North Korea and China, is the highest peak on the Korean peninsula and lies at the heart of North Korea’s foundation myth.

Equipped with a small porthole and digital camera, the Shinkai 6500 sank to depths of more than 19,000 feet when it approached a shelf of volcanic rock, according to a study published July 24 in the ...