Shaken in Indonesia

As if two massive earthquakes and the Dec. 26 tsunami weren't enough, Indonesia has a new geological concern: a string of volcanoes threatening to erupt. Tens of thousands of residents living near Mount Talang on the island of Sumatra fled their homes after the mountain began spewing hot ash last Tuesday. Two days later, Mount Tangkuban Parahu, a 2,084-m peak only 16 km from Bandung, the country's third-largest city, grumbled to life, bringing to 11 the number of Indonesian volcanoes now being monitored for possible eruption.

Indonesian scientists say the Dec. 26 and March 28 quakes off...