1. 

   Indonesia, the world's most active volcanic region, lies on the Pacific "Ring of Fire" where tectonic plates collide, causing frequent volcanic and seismic activities. Mount Agung has been hurling clouds of white and dark gray ash about 3,000 meters (9,800 feet) into the atmosphere since the weekend and lava is welling up in the crater, sometimes reflected as a reddish-yellow glow in the ash plumes. Indonesian authorities ordered a mass evacuation of people from an expanded danger zone around an erupting volcano on Bali. Ash has reached a height of about 30,000 feet as it drifts across the island. Let us take a look at the images from Bali that show aftermath of Mount Agung eruption:

2. 

   Agung looms over eastern Bali to a height of just over 3,000 meters (9,800 feet). Its last major eruption in 1963 killed more than 1,000 people and razed several villages. (AP Photo)

3. 

   Authorities are urging people living up to 10 km (6 miles) from the summit to move to emergency centres, but tens of thousands don't want to leave their homes and livestock unattended. In this photo scene after Mount Agung erupted in Bali, Indonesia. (Reuters Photo)

4. 

   The disaster mitigation agency said on Wednesday about 43,000 people had moved to shelters, but many were thought to be staying put as up to 100,000 people are estimated to live within the danger zone. (AP Photo)

5. 

   Ash and smoke ejected so far by the Agung volcano, which has been erupting in recent days, has not been big enough or high enough in the atmosphere to cool world temperatures. But scientists say they are studying what would happen if the volcano has a repeat of a far bigger eruption in 1963. (AP Photo)

6. 

   Tens of thousands of Balinese have already fled their homes around the volcano -- which last erupted in 1963, killing around 1,600 people -- but as many as 100,000 will likely be forced to leave in case of a full eruption, disaster agency officials have said. (AP Photo)

7. 

   Many scientists are keeping an eye on the Agung eruption in Bali. In this photo scene after Mount Agung erupted in Bali, Indonesia. (Reuters Photo)

8. 

   The Agung volcano has probably ejected only about 10,000 tonnes of sulphur dioxide in the latest eruption, and not as high as the stratosphere. (Reuters Photo)

9. 

   The shifting wind direction was being caused by cyclone Cempaka which is battering Indonesia's main Java island --west of Bali -- and has left at least 19 people dead in severe flooding and landslides. (AP Photo)

10. 

    Ash is dangerous for planes as it makes runways slippery and can be sucked into their engines. In this photo scene after Mount Agung erupted in Bali, Indonesia. (Reuters Photo)

11. 

    More than 4,500 people have now flown out of Bali's main airport, authorities said, with around 3,200 of them on international flights. (AP Photo)

12. 

    Millions of tourists visit palm-fringed Bali annually. In this photo scene after Mount Agung erupted in Bali, Indonesia. (Reuters Photo)

13. 

    The majority are Chinese, followed by Australians, Indians, Britons and Japanese, according to the immigration office, which added that nearly 25,000 foreigners live on the small Hindu-majority island. (AP Photo)

14. 

    Experts said Agung's recent activity matches the build-up to the earlier disaster, which ejected enough debris -- about a billion tonnes -- to lower global average temperatures by around 0.3 degrees Celsius for roughly a year. In this photo scene after Mount Agung erupted in Bali, Indonesia. (Reuters Photo)

15. 

    Last year seven people were killed after Mount Sinabung on the western island of Sumatra erupted. A 2014 eruption at Sinabung killed 16. (Reuters Photo)