How many volcanoes are there in Indonesia?

There are more than 500 volcanoes in Indonesia, including 77 active volcanoes/kloc-0.

In addition, the most about volcanoes:

The most violent volcanic eruption in human history is the Tambora volcano on the Indonesian island of Sumba. 18 15 from April 5 to July15, the sound of volcanic eruption reached 1600 kilometers away, and volcanic ash filled the sky. The range of 400 kilometers was dark and the darkness covered the sky for three days. The upper part of the volcano was stripped1250m, and the lost mountain was about 30 cubic kilometers (7 billion tons), and the total eruption volume reached 15 17 cubic kilometers. Volcanic eruptions triggered earthquakes and tsunamis.

The most active volcanoes in the world are Nyiragongo volcano in eastern Zaire, Africa and Kilauea volcano in eastern central Hawaii, USA. They all have peculiar "magma lakes", with temperatures as high as1000 ~1100℃ and other heights as high as 1350℃. Magma boils like molten steel, and sometimes there will be a "magma fountain" several meters high.

The largest volcano in the world is Yasu volcano. Although the height of the mountain is only1592m, the crater is 27km long from north to south,169km wide from east to west, and its perimeter is114km.

The highest active volcano in the world is Antofara volcano in Argentina, with an altitude of 6450 meters. The highest extinct volcano in the world is also in Argentina. It is the famous Aconcagua Mountain, with an altitude of 6964 meters.

The shortest volcano in the world is Taal volcano in Luzon, Philippines, with a relative height of only 200 meters.

Africa has the most volcanoes in the world. There are more than 9,000 large and small volcanoes on this continent, most of which are extinct volcanoes, and there are only more than 30 active volcanoes, mainly distributed on both sides of the Great Rift Valley in East Africa.

Asia has the largest number of active volcanoes in the world. Among more than 500 active volcanoes in the world, there are more than 200 in Asia. The country with the largest number of volcanoes in the world is Indonesia. There are more than 500 volcanoes in China, including 77 active volcanoes/KLOC-0.

The northernmost volcano in the world is the Lunberg volcano (2277 meters above sea level) on Jan Mayen Island in Greenland Sea, with a position of 75 05' north latitude and 810' west longitude.

The southernmost volcano in the world is Mount Erebus on Ross Island, Antarctica (3,794 meters above sea level), located at 77 35' south latitude and16710' east longitude.

Japan is one of the countries with the most volcanic eruptions, and there are earthquakes and volcanic activities in varying degrees almost all year round.

Volcano is not a mountain spewing "fire", but a high-temperature viscous substance called magma. The scene when the volcano erupted was spectacular. Usually magma is tightly wrapped in the earth's crust. Because of its extremely high temperature and great pressure from the earth's crust, whenever cracks appear in the thin earth's crust, magma will rush out of the ground violently.

When the volcano erupts, with the earth-shattering roar, stones fly and roll, and fiery magma spews out of the ground like a fierce dragon, devouring everything around. At the moment, dozens of miles in Fiona Fang are shrouded in thick smoke. Sometimes, due to volcanic eruption, a mountain can be erected instantly on the flat ground, such as Kilimanjaro and Coto Paxi near the equator. Sometimes, it can devour whole villages and towns in an instant.

Volcanoes form below the surface, and the deeper the place, the higher the temperature, about 20 miles deep, which is high enough to melt most rocks. When the rock melts, it expands and needs more space. This material melted by high temperature will rise along the cracks caused by the uplift. When the pressure in the lava tank is greater than the pressure of the rock above it, it explodes outward to form a volcano.