1.   Pressure builds until the volcano explodes.

2.   Three days later, the volcano exploded.

3.   When Volcanoes Get Violent Some volcanos explode dramatically, while others are content merely to spew their lava down the hillside.

4.   The towering volcano exploded repeatedly Tuesday and expelled a huge hot cloud that raced down a narrow river valley, searing everything in its path.

5.   In a pre-dawn announcement early Wednesday, the government ordered evacuated residents to move farther north after scientists warned of an increased chance the rumbling volcano would explode.