VOLCANOES

NOVARUPTA, ALASKA

• The June 1912 eruption of Novarupta was the largest of the 20th century.
• Novarupta is part of the Pacific Ring of Fire.
• The eruption sent 3 cubic miles of magma and volcanic ash into the air.
• It fell to cover an area of 3,000 sq miles in ash more than a foot deep.
• The Katmai caldera was formed by the eruption.

EYJAFJALLAJÖKULL, ICELAND

• "Island mountain glacier", it is one of the smaller ice caps of Iceland.
• The eruption sent lava 100m into the air and tore a 1km-long fissure in the ice.
• Icelandic airspace was closed, along with 20 European countries.
• Before 2010, the last eruption was in 1821.

VOLCANIC AIR POLLUTION AND EFFECTS

• Sulfurous volcanic emissions are called vog.
• Vog and other gases from volcanoes can cause acid rainfall.