Like dormant volcanos, earthquakes, too, can strike in areas considered seismically inactive.

In the wake of the Pinatubo explosions is the long term threat to settlements posed by lahars "rivers" of volcanic sediment and rain.

Natural disasters are trying times for people and a test of government ability and determination to handle crises. In the Philippines, the explosions of the Pinatubo and Mayon volcanoes exposed how ill-conceived efforts can cause more harm than good.

Africa's Lake Kivu contains vast quantities of gas, which makes it both dangerous and valuable. Anjali Nayar asks whether it is possible to tap the gas without causing a disaster.

Slumbering in Indonesia is the world's biggest geothermal energy potential. Improved promotion policy and high fuel prices might help it to make a breakthrough.