narrator: the next august, tungurahua releases a column of steam thousands of feet in the air.dly vapor accompanies more earthquakes and sulfur emissions. it's time for the scientists to go public. on the tenth of september, we decided we had better call a yellow alert, which changed the way everybody looked at the volcano. narrator: soon, people could not only see but feel the danger. ( volcano rumbling ) the violent mountain throws out clouds of volcanic ash, suffocating crops and animals. voano rumb ) now, ordinary citizens could taste the peril lurking in the mountain. their fears are reflected in patty's tilt meters, which show powfuforces puing st bel sur. their fears are reflected she believes the surge is caused by molten magma rising to the peak. mothes: we knew that magma was moving, t we'd not been able to confirm visually that it was there near the summit. narrator: suddenly, it surfaced-- fiery magma glowing in the midnight sky. ( loud boom ) ( crowd exclaims; whistling ) ( people cheering ) hall: the incandescence that we saw on the 11th of october led us to belie