Mount Nyiragongo is located within Virunga National Park, inwards the Democratic Republic of the Congo, virtually xx km due north of the town of Goma together with Lake Kivu. It is 1 of the most active volcanoes inwards Africa, together with 1 of viii volcanoes inwards the Virunga Mountains. The principal crater is virtually 2 km broad together with commonly contains a lava lake which look inwards the summit crater.
Nyiragongo’s lava lake has at times been the most voluminous known lava lake inwards recent history. The depth of the lava lake varies considerably depending on the activeness of the volcano. H5N1 maximum elevation of the lava lake was recorded at virtually 3250 m (10,700 ft) prior to the Jan 1977 eruption – a lake depth of virtually 600 m (2000 ft). H5N1 recent really depression elevation of the lava lake was recorded at virtually 2700 m (8800 ft).
Not much is known virtually how long the volcano has been erupting, exactly since 1882, it has erupted at to the lowest degree 34 times, including many periods where activeness was continuous for years at a time, oftentimes inwards the shape of a churning lava lake inwards the crater.
The lava emitted inwards eruptions at Nyiragongo is oftentimes unusually fluid, mayhap due to the presence of melilite nephelinite, an alkali-rich type of volcanic stone having odd chemic composition. Because of the extreme fluidity, Nyiragongo’s lava flows tin race downhill at upwards to lx miles per hr (up to 100 km/h), whereas most lava flows at a walking stair together with rarely pose a danger to human life.
Between 1894 together with 1977 the crater contained an active lava lake. On 10 Jan 1977, the crater walls fractured, together with the lava lake drained inwards less than an hr overwhelming villages together with killing at to the lowest degree seventy people. Some reports quote much higher figures of upwards to several m people. The hazards posed past times eruptions similar this are unique to Nyiragongo. Nowhere else inwards the world does such a steep-sided stratovolcano comprise a lake of such fluid lava.
Another major eruption of the volcano began on Jan 17, 2002. Lava from the reformed lava lake streamed out inwards 200 to m m broad streams together with upwards to 2 m deep. Warnings had been given together with 400,000 people were evacuated from the metropolis across the Rwandan edge into neighbouring Gisenyi during the eruption. Despite the precautionary measures, virtually 147 people died inwards the eruption from asphyxiation past times carbon dioxide together with buildings collapsing due to the lava together with earthquakes.
Six months subsequently the offset of the 2002 eruption, Nyiragongo volcano erupted again. Activity at Nyiragongo is ongoing, exactly currently confined to the crater, where or together with thence other lava lake has formed virtually 250 metres below the degree of the 1994 lava lake.
In June 2010, a squad of scientists together with intrepid explorers stepped onto the shore of the lava lake boiling inwards the depths of Nyiragongo Crater. These pictures are from the trip, past times lensman Olivier Grunewald.