Sakurajima volcano located on the Southwestern part Kagoshima of Japan is gearing up for its first major eruption in over 100 years and it appears to be deadly

Sakurajima Volcano with flame like lightening

14 million cubic metres of magma is accumulating each year beneath Sakurajima, enough to fill London's Wembley Stadium 3 and a half times over

One of Japan's most active volcanoes will erupt very soon, researchers who have been studying a build-up of magma have said with potentially devastating consequences.

The University of Bristol warned in its latest report that Japan's Sakurajima volcano , which is just 50 km (31 miles) from a nuclear reactor, is showing signs of increased activity.

The mountain on the southern island of Kyush is one of Japan's most active volcanoes, and erupts almost constantly.

However, the researchers said a much larger eruption is due to occur within the next 30 years after research showed 14 million cubic metres of magma is accumulating beneath the volcano every year enough to fill London's Wembley Stadium 3.5 times over.

Sakurajima's last deadly eruption was in 1914, when 58 people died.

It sits with more than a hundred other volcanoes in the Japanese archipelago, which sits on the Pacific "Ring of fire" a horseshoe-shaped band of fault lines and volcanoes around the edges of the Pacific Ocean.

Sakurajima is said to be particularly dangerous as it still very dormant. It regularly spews ash and there are many small explosions there each year, with the latest eruption taking place in February.

It is closely monitored by Japanese authorities, and is one of two volcanoes at Level 3 out of 5 levels on Japan's volcanic warning system , which means that people are warned not to approach it.

Mountain Sakurajima aerial view

Bristol University and the Sakurajima Volcano Research Centre published its latest report on the activity of the volcano on Tuesday.