In this photo made with a slow shutter speed, Mount Sinabung spews hot lava and volcanic ash as seen from Jeraya, North Sumatra, Indonesia, early Tuesday, October 14, 2014. Mount Sinabung, among about 130 active volcanoes in Indonesia, has sporadically erupted since 2010 after being dormant for 400 years. (Photo by Binsar Bakkara/AP Photo)

Mount Sinabung spews pyroclastic smoke, seen from Tiga Pancur village on October 13, 2014 in Berastagi, Karo district, North Sumatra, Indonesia. Mount Sinabung, which has lain dormant for over 400 years, has been intermittently erupting since September 15 last year, killing 15 people and forcing hundreds to flee their homes. According to The National Disaster Mitigation Agency, more than 3,000 residents are still displaced. (Photo by Ulet Ifansasti/Getty Images)

A family cover their face as passing through an area covered by ash after Mount Sinabung erupted spewing volcanic materials on October 13, 2014 in Berastagi, Karo district, North Sumatra, Indonesia. Mount Sinabung, which had lain dormant for over 400 years, has been intermittently erupting since September 15 last year, killing 15 people and forcing hundreds to flee their homes. According to The National Disaster Mitigation Agency, more than 3,000 residents are still displaced. (Photo by Ulet Ifansasti/Getty Images)

People watch as Mount Sinabung spews pyroclastic smoke at Tiga Pancur village on October 13, 2014 in Berastagi, Karo district, North Sumatra, Indonesia. (Photo by Ulet Ifansasti/Getty Images)

A man cleans his car as their village is hit by ash from the eruption of Mount Sinabung on October 13, 2014 in Berastagi, Karo district, North Sumatra, Indonesia. (Photo by Ulet Ifansasti/Getty Images)

Villagers stand on their fields as their village is hit by ash from the eruption of Mount Sinabung on October 13, 2014 in Berastagi, Karo district, North Sumatra, Indonesia. (Photo by Ulet Ifansasti/Getty Images)

Villagers stand on their fields as their village is hit by ash from the eruption of Mount Sinabung on October 13, 2014 in Berastagi, Karo district, North Sumatra, Indonesia. (Photo by Ulet Ifansasti/Getty Images)

Villagers clean their cabbage fields after their village is hit by ash from the eruption of Mount Sinabung on October 13, 2014 in Berastagi, Karo district, North Sumatra, Indonesia. (Photo by Ulet Ifansasti/Getty Images)

Kalem (R), cleans her temporary tent as their village is hit by ash from the eruption of Mount Sinabung on October 13, 2014 in Berastagi, Karo district, North Sumatra, Indonesia. (Photo by Ulet Ifansasti/Getty Images)

Residents ride their motorcycles leaving their village as Mount Sinabung sprews hot gas and ashes at Guru Kinayan village in Karo, North Sumatra, Indonesia, 13 October 2014. Mount Sinabung in North Sumatra province has been erupting since last week, forcing hundreds of people to flee their home. The 2,460-metre volcano had been dormant for 400 years before it erupted in August 2010. (Photo by Dedi Sahputra/EPA)

Indonesian students walk on a street covered in Mount Sinabung volcanic ash in Sukandebi village, Karo, North Sumatra, Indonesia, 10 October 2014. (Photo by Dedy Sahputra/EPA)

Mount Sinabung volcano, spewing lava and a giant cloud of volcanic ash that threatens villages on October 10, 2014. Hundreds of people have been forced to flee their homes around Indonesia's Mount Sinabung volcano after a series of eruptions that began on Sunday. The 8,530ft volcano, in North Sumatra, started erupting four years ago and is among about 130 active volcanoes in the country. (Photo by Ivan Damanik/NurPhoto/ZUMA Wire)

This long exposure photograph taken late on October 9, 2014 shows scorching lava flow and giant ash clouds released from the crater during the eruption of Mount Sinabung volcano as seen from Karo district located in Sumatra island. Indonesian authorities said pyroclastics flow reached 4.5 kilometers down the slope threatening populated villages whlie ash clouds reached three kilometers to the sky during it latest series of eruption that began on October 5. (Photo by Sutanta Aditya/AFP Photo)

Refugees wear masks to protect themselves from the thick volcanic ash with his personal motorcycle when following the eruption of Mount Sinabung volcano repeatedly seen from the Karo district, Sumatra, Indonesia. on October 9th, 2014 still very high activity Sinabung Alert III status, so potentially has accompanied the eruption of hot clouds glide. (Photo by Ivan Damanik/NurPhoto/ZUMA Wire)

Dark giant ash clouds rise from the crater of Mount Sinabung volcano during an eruption on October 8, 2014, as seen from Karo district located on Indonesia's Sumatra island, following an earlier eruption on October 5, 2014. (Photo by Sutanta Aditya/AFP Photo)

School children wear face masks to protect from of volcanic ash following the eruption of Mount Sinabung volcano seen from Karo district on October 9, 2014. (Photo by Sutanta Aditya/AFP Photo)

Hot volcanic spew erupts from Mount Sinabung at the Tiga Serangkai village, Simpang Empat Districk, Karo, North Sumatra. Indonesia on October 8, 2014. The volcano, which has been active since September 2013, erupted in February, killing at least 15 people and forcing thousands to evacuate their homes. There have been no casualties reported from this latest eruption, which has been happening for the last four days. (Photo by Yuono Tanto H/NurPhoto/ZUMA Wire)

Dark giant ash clouds rise from the crater of Mount Sinabung volcano during an eruption on October 8, 2014, as seen from Karo district located on Indonesia's Sumatra island, following an earlier eruption on October 5, 2014. (Photo by Sutanta Aditya/AFP Photo)

Mount Sinabung volcano with lava blowing a giant cloud of volcanic ash that threatened villages during the eruption many times in recent eruption in Karo, Sumatra, October 10, 2014. According to the Information and Public Relations National Disaster Management Agency (BNPB), very high activity Sinabung Alert III status, thus potentially accompany the eruption of hot clouds glide pyroclastic flow reached 4.5 kilometers down the slopes with ash clouds reaching up to three kilometers into the sky. (Photo by Ivan Damanik/NurPhoto/ZUMA Wire)

This long exposure photograph taken early on October 10, 2014 shows giant ash clouds released from the crater during the eruption of Mount Sinabung volcano as seen from Karo district located in Sumatra island. (Photo by Sutanta Aditya/AFP Photo)