1.   Overhead, lightning flickered frequently as the static electricity accumulating in the ash cloud discharged.

2.   At the far end of the Alaskan peninsula, a volcano erupted Monday afternoon spewing an ash cloud over Unimak island.

3.   Surgical masks are stuffed in pants and shirt pockets, ready in case an ash cloud drops its cargo.

4.   While the greatest effect from Popcatapetl is expected to be colorful sunsets near the ash cloud, some large tropical volcanic eruptions can disrupt the climate.

5.   A second, larger avalanche created ash clouds that generated thunder and temporarily blotted out the sun.

6.   An ash cloud can severely damage a plane in several ways.

7.   And late Monday it briefly exploded, thrusting glowing rock and a thundering ash cloud six miles high.

8.   Hundreds left Montserrat, a British colony, when the volcano awoke in July, dusting the southwest of the island with ash clouds.

9.   It was later found that the jet had flown into a volcanic ash cloud that clogged up the engines.

10.   Later, during a tour of the port, a large ash cloud settled on him.