The explosions inside here will trigger sympathetic detonations of all the missiles in the place.
Scientists believe landslides, volcanic activity, or explosions can trigger such an eruption.
According to the news agency Interfax, the explosions triggered fires in the nearby forest.
They concluded that an external explosion had triggered the explosion of the magazines.
The initial explosion triggered a fire and subsequent series of explosions which continued for three days.
The second explosion triggered a slide below the men.
A violent shock wave seemed to ride through the ground beneath Valdez as if the explosion might trigger an earthquake.
"Hard to imagine how an explosion could trigger melting like this," the short, thin geologist said.
Huge explosions triggered lava flows that destroyed three villages, killing about 80 people and 45,000 cattle.
The explosion triggered a mudflow, that travelled down a nearby river valley.
