Aviation at risk as Kamchatka volcano erupts.

The Shiveluch volcano in Russia's Kamchatka Peninsula erupted early on Tuesday and sent up an ash plume 10 kilometers high into the air, posing an increased threat to air traffic. The Kamchatka Volcanic Eruption Response Team (KVERT) issued a code red Volcano Observatory Notice for Aviation, noting that ash explosions 15 kilometers high could occur at any time. Local authorities closed schools and ordered residents in nearby villages to stay indoors. The peninsula in the north Pacific Ocean has about 160 volcanoes, but only about two dozen of them are active.