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Indonesian school children skip as mount Sinabung (backgournd) continues spewing smoke and hot ash in Karo on February 4 , 2014. A volcano in western Indonesia that killed 15 people in a weekend eruption shot hot ash and rocks high into the air again on February 3, halting a search for any more victims. (ADEK BERRY/AFP/Getty Images) ( 526644254 )

A view of tomatoes covered by ash from the Mount Sinabung eruption at Sibintun village on February 04, 2014 in Karo District, North Sumatra, Indonesia. The number of displaced people has increased to around 30,000 in Western Indonesia as Mount Sinabung continues to spew ash and smoke after a series of several eruptions since September. At least 15 people were killed in an eruption of Mount Sinabung on Saturday, after residents were allowed to returned to their homes on Friday by authorities who had said that activity was decreasing. (Photo by Ulet Ifansasti/Getty Images) ( 458355925 )

A villager places cabbages into a basket after they harvests from their fields as Mount Sinabung spews hot smoke at Jeraya village on February 04, 2014 in Karo District, North Sumatra, Indonesia. The number of displaced people has increased to around 30,000 in Western Indonesia as Mount Sinabung continues to spew ash and smoke after a series of several eruptions since September. At least 15 people were killed in an eruption of Mount Sinabung on Saturday, after residents were allowed to returned to their homes on Friday by authorities who had said that activity was decreasing. (Photo by Ulet Ifansasti/Getty Images) ( 458355977 )

Indonesian villagers watch as mount Sinabung spews smoke and hot ash in Karo on February 4, 2014. A volcano in western Indonesia that killed 15 people in a weekend eruption shot hot ash and rocks high into the air again on February 3, halting a search for any more victims. (ADEK BERRY/AFP/Getty Images) ( 526644659 )

Mount Sinabung volcano spews thick smoke and hot ash in Karo on February 4 , 2014. A volcano in western Indonesia that killed 15 people in a weekend eruption shot hot ash and rocks high into the air again on February 3, halting a search for any more victims. (ADEK BERRY/AFP/Getty Images) ( 526644020 )

An Indonesian farmer (R) harvests chili as mount Sinabung spews smoke in Karo on February 4, 2014. A volcano in western Indonesia that killed 15 people in a weekend eruption shot hot ash and rocks high into the air again on February 3, halting a search for any more victims. (ADEK BERRY/AFP/Getty Images) ( 526644820 )

Rescuers search victims of the eruption of Mount Sinabung in Suka Meriah, North Sumatra, Indonesia, Saturday, Feb. 2, 2014. Mount Sinabung erupted Saturday killing more than a dozen of people. (AP Photo/Binsar Bakkara) ( APTOPIX Indonesia Volcano )

Indonesian rescuers enter an abandoned village as they search for victims around the ash-covered danger zone from Mount Sinabung volcano in Karo district on February 2, 2014. Indonesian officials searched through thick ash for bodies after Mount Sinabung volcano erupted, killing at least 15 people, with the only sign of life an ownerless mobile phone ringing inside an abandoned bag. (ATAR/AFP/Getty Images) ( 526605879 )

Relatives carry a coffin during the burial of a victim that was killed after being hit by pyroclastic smoke from the eruption of Mount Sinabung on February 02, 2014 in Suka village, Karo District, North Sumatra, Indonesia. The number of displaced people has increased to around 30,000 in Western Indonesia as Mount Sinabung continues to spew ash and smoke after a series of several eruptions since September. At least 15 people have been killed in a eruption of Mount Sinabung, as residents returned to their local homes after they were told by authorities that activity was decreasing. (Photo by Ulet Ifansasti/Getty Images) ( 466561273 )

Villagers have dinner at a temporary shelter in Karo on February 2, 2014 as they left their homes following Sinabung eruptions. Indonesian officials searched through thick ash for bodies on February 2 after Mount Sinabung volcano erupted, killing at least 15 people, with the only sign of life an ownerless mobile phone ringing inside an abandoned bag. (ADEK BERRY/AFP/Getty Images) ( 526616154 )

An Indonesian soldier runs on ash-covered road as he and his team search victims of the eruption of Mount Sinabung in Suka Meriah, North Sumatra, Indonesia, Saturday, Feb. 2, 2014. Mount Sinabung erupted Saturday killing more than a dozen of people. (AP Photo/Binsar Bakkara) ( CORRECTION Indonesia Volcano )

A woman cries during the burial of a victim that was killed after being hit by pyroclastic smoke from the eruption of Mount Sinabung on February 02, 2014 in Suka village, Karo District, North Sumatra, Indonesia. The number of displaced people has increased to around 30,000 in Western Indonesia as Mount Sinabung continues to spew ash and smoke after a series of several eruptions since September. At least 15 people have been killed in a eruption of Mount Sinabung, as residents returned to their local homes after they were told by authorities that activity was decreasing. (Photo by Ulet Ifansasti/Getty Images) ( 466561265 )

Relatives attend during the burial of a victim after hit by pyroclastic smoke from eruption of Mount Sinabung on February 02, 2014 in Suka village, Karo District, North Sumatra, Indonesia. The number of displaced people has increased to around 30,000 in Western Indonesia as Mount Sinabung continues to spew ash and smoke after a series of several eruptions since September. At least 15 people have been killed in a eruption of Mount Sinabung, as residents returned to their local homes after they were told by authorities that activity was decreasing. (Photo by Ulet Ifansasti/Getty Images) ( 466561275 )

Relatives pray during the burial of a victim that was killed after being hit by pyroclastic smoke from the eruption of Mount Sinabung on February 02, 2014 in Suka village, Karo District, North Sumatra, Indonesia. The number of displaced people has increased to around 30,000 in Western Indonesia as Mount Sinabung continues to spew ash and smoke after a series of several eruptions since September. At least 15 people have been killed in a eruption of Mount Sinabung, as residents returned to their local homes after they were told by authorities that activity was decreasing. (Photo by Ulet Ifansasti/Getty Images) ( 466561271 )

Rescuers search victims of the eruption of Mount Sinabung in Bekerah, North Sumatra, Indonesia, Saturday, Feb. 2, 2014. Mount Sinabung erupted Saturday killing more than a dozen of people. (AP Photo/Binsar Bakkara) ( Indonesia Volcano )

Relatives pray during the burial of a victim that was killed after being hit by pyroclastic smoke from the eruption of Mount Sinabung on February 02, 2014 in Suka village, Karo District, North Sumatra, Indonesia. The number of displaced people has increased to around 30,000 in Western Indonesia as Mount Sinabung continues to spew ash and smoke after a series of several eruptions since September. At least 15 people have been killed in a eruption of Mount Sinabung, as residents returned to their local homes after they were told by authorities that activity was decreasing. (Photo by Ulet Ifansasti/Getty Images) ( 466561285 )

Villagers have dinner at a temporary shelter in Karo on February 2, 2014 as they left their homes following Sinabung eruptions. Indonesian officials searched through thick ash for bodies on February 2 after Mount Sinabung volcano erupted, killing at least 15 people, with the only sign of life an ownerless mobile phone ringing inside an abandoned bag. (ADEK BERRY/AFP/Getty Images) ( 526615781 )

Indonesian rescuers lift an abandoned motorcycle in the ash-covered two-kilometre danger zone from the crater of Mount Sinabung volcano in Karo district on February 2, 2014 as teams look for more victims of the eruption. Indonesian officials searched through thick ash for bodies after Mount Sinabung volcano erupted, killing at least 15 people, with the only sign of life an ownerless mobile phone ringing inside an abandoned bag. (ATAR/AFP/Getty Images) ( 526605858 )

Villagers and a journalist prepare to flee as Mount Sinabung releases pyroclastic flows during an eruption in Namantaran, North Sumatra, Indonesia, Saturday, Feb. 1, 2014. The rumbling volcano in western Indonesia has unleashed fresh clouds of searing gas, killing a number people and injuring fewothers. (AP Photo) ( Indonesia Volcano )

Mount Sinabung spews volcanic materials in Karo, North Sumatra, Indonesia, 01 February 2014. At least 14 people were killed when a volcano on the Indonesian island of Sumatra spewed lava and hot gas, an aid worker said. The eruption of Mount Sinabung came a day after the National Disaster Management Agency said residents living farther than 5 kilometers from the peak were being allowed to return to their homes after a lull in activity. EPA/CHAIRALY ( epaselect INDONESIA SINABUNG VOLCANO )

An Indonesian journalist looks at the mounth Sinabung spewing volcanic materials in Karo, North Sumatra, Indonesia, 01 February 2014. At least 14 people were killed when a volcano on the Indonesian island of Sumatra spewed lava and hot gas, an aid worker said. EPA/CHAIRALY ( INDONESIA SINABUNG VOLCANO )

Indonesian paramedics clean up a body of the Sinabung volcanic eruption victim at a hospital in Kabanjahe, Karo, North Sumatra, Indonesia, 01 February 2014. At least 14 people were killed when a volcano on the Indonesian island of Sumatra spewed lava and hot gas, an aid worker said. The eruption of Mount Sinabung came a day after the National Disaster Management Agency said residents living farther than five kilometres from the peak were being allowed to return to their homes after a lull in activity. EPA/DEDI SAHPUTRA ( INDONESIA SINABUNG VOLCANO ERUPTION )

Indonesian relatives mourn for the Sinabung volcanic eruption victims at a hospital in Kabanjahe, Karo, North Sumatra, Indonesia, 01 February 2014. EPA/DEDI SAHPUTRA ( INDONESIA SINABUNG VOLCANO ERUPTION )

An Indonesian villager checks on bodies of mounth Sinabung eruption victims shortly after an eruption in Karo, North Sumatra, Indonesia, 01 February 2014. EPA/DIAN SYLVIA Graphic content ( INDONESIA SINABUNG VOLCANO )

Villagers watch as Mount Sinabung releases pyroclastic flows during an eruption in Namantaran, North Sumatra, Indonesia, Saturday, Feb. 1, 2014. The rumbling volcano in western Indonesia has unleashed fresh clouds of searing gas, killing a number people and injuring few others. (AP Photo) ( Indonesia Volcano )

Relatives carry a coffin containing the body a victim of the eruption of Mount Sinabung, at a hospital in Kabanjahe, North Sumatra, Indonesia, Saturday, Feb. 1, 2014. (AP Photo/Binsar Bakkara) ( Indonesia Volcano )

A resident looks on at giant volcanic ash clouds from a village in Karo district during the eruption of Mount Sinabung volcano located in Indonesia's Sumatra island on February 1, 2014. Fourteen people, including four schoolchildren, were killed February 1 after they were engulfed by scorching ash clouds spat out by Indonesia's Mount Sinabung in its biggest eruption in recent days, officials said. AFP PHOTO / CHAIDEER MAHYUDDIN/AFP/Getty Images ( 526580372 )

Rescuers recover the body of a victim at a village in Karo district following eruptions of Mount Sinabung located in Indonesia's Sumatra island on February 1, 2014. AFP PHOTO / SUTANTA ADITYA/AFP/Getty Images ( 526580551 )

Mount Sinabung releases pyroclastic flows during an eruption as seen from Namantaran, North Sumatra, Indonesia, Saturday, Feb. 1, 2014. (AP Photo) ( Indonesia Volcano )

Nurses dress a victim of the eruption of Mount Sinabung for burial at a hospital in Kabanjahe, North Sumatra, Indonesia, Saturday, Feb. 1, 2014. (AP Photo/Binsar Bakkara) ( Indonesia Volcano )

The body of a victim is covered with hot volcanic ash at a village in Karo district following eruptions of Mount Sinabung volcano, seen in the background, located in Indonesia's Sumatra island on February 1, 2014. AFP PHOTO / SUTANTA ADITYA/AFP/Getty Images ( 526583577 )

Residents run away to escape from hot volcanic ash clouds engulfing villages in Karo district during the eruption of Mount Sinabung volcano located in Indonesia's Sumatra island on February 1, 2014. AFP PHOTO / SUTANTA ADITYA/AFP/Getty Images ( 526583573 )

A resident looks at giant volcanic ash clouds from a village in Karo district during the eruption of Mount Sinabung volcano located in Indonesia's Sumatra island on February 1, 2014. AFP PHOTO / CHAIDEER MAHYUDDIN/AFP/Getty Images ( 526584389 )

Residents rest after evacuating from villages engulfed by giant volcanic ash clouds in Karo district during the eruption of Mount Sinabung volcano located in Indonesia's Sumatra island on February 1, 2014. AFP PHOTO / CHAIDEER MAHYUDDIN/AFP/Getty Images ( 526584448 )

A resident evacuates from hot volcanic ash clouds engulfing villages in Karo district during the eruption of Mount Sinabung volcano located in Indonesia's Sumatra island on February 1, 2014. AFP PHOTO / CHAIDEER MAHYUDDIN/AFP/Getty Images ( 526584443 )

A giant cloud of hot volcanic ash clouds engulfs villages in Karo district during the eruption of Mount Sinabung volcano located in Indonesia's Sumatra island on February 1, 2014. AFP PHOTO / CHAIDEER MAHYUDDIN/AFP/Getty Images ( 526584884 )

A giant cloud of hot volcanic ash clouds engulfs villages in Karo district during the eruption of Mount Sinabung volcano located in Indonesia's Sumatra island on February 1, 2014. AFP PHOTO / SUTANTA ADITYA/AFP/Getty Images ( 526583036 )

A resident runs away to escape from hot volcanic ash clouds engulfing villages in Karo district during the eruption of Mount Sinabung volcano located in Indonesia's Sumatra island on February 1, 2014. AFP PHOTO / SUTANTA ADITYA/AFP/Getty Images ( 526583028 )