A list of Indonesia's most deadly volcanic eruptions over the past 200 years

JAKARTA: Indonesia, where nearly 50,000 people have been evacuated over fears of an imminent volcanic eruption at Mount Agung on Bali, is the world's most volcanic region with 129 active volcanoes.

The Southeast Asian archipelago, which counts more than 17,000 islands and islets, is situated on the Pacific "ring of fire", a vast zone of instability where the collision of tectonic plates causes frequent quakes and major volcanic activity.

Here are some of the country's most deadly volcanic eruptions.

- Mount Tambora - 

In 1815 Mount Tambora on the island of Sumbawa explodes in one of the most violent eruptions in recorded history. An estimated 12,000 people die, while a resulting famine causes the death of 80,000 more.

- Krakatoa -

The island of Krakatoa is practically wiped off the map in 1883 by a volcanic explosion so powerful that it is heard some 4,500 kilometres (2,800 miles) away. 

About 36,000 people are killed in the eruption and the resulting tsunami, or tidal wave. A new volcano emerges in 1928 on the same site.

- Kelud -

This volcano on Java island has erupted several times. In 1568 it kills 10,000 people, taking another 5,000 lives in 1919. 

In February 2014, 75,000 people were evacuated due to a forecast eruption of the same volcano.

- Merapi -

In 1930 an eruption in Java of Mount Merapi -- considered one of the most active and dangerous volcanoes in the world -- kills more than 1,300 people. 

It erupts again in 2010, forcing 280,000 people to flee and killing more than 300 in what is considered its most powerful eruption since 1930.

Merapi is also one of the most densely populated volcanic sites: 12,000 people live on its slopes and a million people live under its threat.

- Agung -

Agung, a spiritual centre on the island of Bali, goes through several successive eruptions in 1963 which leave nearly 1,600 dead.