lava

Lava fountains are pictured at the site of a fissure eruption near Iceland's Bardarbunga volcano September 2, 2014. A fissure eruption near Iceland's Bardarbunga volcano was still spouting lava on Monday but no ash, a day after an eruption that briefly caused the country to raise its ash alert level for aviation to its highest level. Iceland's largest volcanic system - 190 km long and up to 25 km wide (118 miles by 15.5 miles) - has been hit by thousands of earthquakes over the last two weeks, putting scientists have been on high alert.

Armann Hoskuldsson/Reuters

Lava fountains spew out at the site of a fissure eruption near Icelands Bardarbunga volcano

Lava spewed by the Tungurahua volcano can be seen from the city of Banos, Ecuador. An orange alert was issued by the volcanic activity of the Tungurahua

Andres Reyes/AFP

Lava spewed by the Tungurahua volcano can be seen from the city of Banos, Ecuador. An orange alert was issued by the volcanic activity of the Tungurahua

The Tungurahua volcano spews smoke as pictured from the city of Huambalo, Ecuador...The Tungurahua volcano spews smoke as pictured from the city of Huambalo, Ecuador, February 3, 2014. An orange alert was issued in response to the volcanic activity. REUTERS/Cris Toala Olivares (ECUADOR - Tags: ENVIRONMENT DISASTER)

Cris Toala Olivares/Reuters

The Tungurahua volcano, as seen from the city of Huambalo, Ecuador Read more

Sinabung volcano spews hot ash and lava in Karo on January 14, 2014.

Sutanta Aditya/AFP

Mount Sinabung volcano spews hot ash and lava in Karo on Tuesday.

Hibiscus flower is seen on ash-covered plant at Mardingding village in Karo district, Indonesia's north Sumatra province...A hibiscus flower is seen on an ash-covered plant at Mardingding village in Karo district, Indonesia's north Sumatra province November 19, 2013. The volcano continued to emit volcanic ash on Monday, throwing an 8,000m (26,247 ft)-high plume into the atmosphere, as thousands of residents fearful of more eruptions remained in temporary shelters, according to local media. REUTERS/Roni Bintang

Roni Bintang/Reuters

A hibiscus flower emerges through a plant covered in volcanic ash in Indonesia’s north Sumatra province after Mount Sinabung erupted and sent an 8,000m-high plume of ash into the atmosphere on Monday. Thousands of residents fearful of more eruptions remained in temporary shelters, according to local media. Read more

A woman and her daughter flee their home as Mount Sinabung erupts in Karo, North Sumatra, Indonesia, Tuesday, Sept. 17, 2013. Thousands of people were evacuated from their villages following the eruption of the 2,600-meter (8,530-feet) volcano Sunday after being dormant for three years, sending thick ash into the sky with small rocks pelting neighboring villages (AP Photo/Binsar Bakkara)

Binsar Bakkara/AP

A woman and her daughter flee their home as Mount Sinabung erupts in Karo, North Sumatra, Indonesia. Thousands of people were evacuated from their villages following the eruption of the 2,600m volcano on Sunday, after it had been dormant for three years Read more

A View of volcano Tungurahua in Cotalo area, central Ecuador, in the early morning hours of 10 May 2013. The volcano is spelling incandescent rocks and generating explosions with an intensity which was defined as 'moderate' by the National Technical College's Geophysical Institute. Authorities gave 3,000 masks to residents living in areas affected by spelled ashes.

Jose Jacome/EPA

A view of the Tungurahua volcano in Cotalo area, central Ecuador. The volcano is spewing incandescent rocks and generating explosions with an intensity which was defined as ‘moderate’ by the National Technical College’s Geophysical Institute. Authorities gave 3,000 masks to residents living in areas affected by ash.