Volcanoes can 'wake up' in 2012

Katla volcano in Iceland. Katla's height is 1,500m, the diameter of the crater is up to 10km. According to scientists from the University of Iceland, the country may witness the biggest volcanic eruption in 100 years. The last time Katla erupted in 1918. Scientists predict, Katla volcano can spray many times larger than Eyjafjallajokull volcano - only 20km away. In the picture is ash from Katla volcano.

Gamalama volcano in Indonesia. Gamalama is 1,715m high, located above the city of Ternate. At the end of 2011, this mountain sprayed thick black smoke columns and 'released' ash into the city, causing many residents living near the mountainside to evacuate.

Kilauea volcano in Hawaii. This is one of the most active volcanoes in the world, located in the remote part of the Volcanic National Park on the big island of Hawaii. The US Geological Agency says this volcano continues to spray or collapse without warning.

Changbai Mountain in Jilin Province, China. It is also a tourist attraction that attracts many tourists in the summer, because this mountain has a very cool and fresh climate. However, this mountain can wake up at any time.

Mayon Volcano in the Philippines. Located about 340km southeast of Manila, Mayon has erupted 48 times since people began to record their "waking" times. This volcano has claimed several thousand lives.

St Helens volcano in America is 2,250m high, located in the "arc of fire" that surrounds the Pacific Ocean, 88km northeast of Portland and is the most active volcano among Cascade Range's 12 active volcanoes, chain of volcanoes stretching from California state to Washington state.

Yellowstone volcano in America is located under Yellowstone National Park in Wyoming. It is being watched by scientists' breathing. The amount of lava in the volcano is growing up. Most likely the volcano will explode with a tremendous eruption force, which is expected to be 1,000 times stronger than the 1980 record eruption of St. Volcano. Helens.

Marsili volcano in Italy. It has a height of 3,000m and is located about 150km southwest of Naples. It is 70km long and 30km wide. The crater is located only 450 meters from the Tyrrhenian Sea. The Italian National Institute of Volcanology and Geophysics (INGV) forecasts that if it explodes, Marsili will create a massive tsunami, attacking the coasts of Campania, Calabria and Sicily in southern Italy.

Merapi volcano in Indonesia. Since becoming active since October 26, 2010, Merapi has had dozens of sprays of ash and lava smoke spilling over the mountainside. The death zone was outlined as 20km away from the crater. Experts who monitor the activity of Merapi volcano are very worried, no one knows how to proceed.