An erupting volcano on Russia's Kamchatka Peninsula has attracted widespread interest from volcanologists who flocking to the area to research lava flows and eruption processes first hand.

Dormant for nearly 40 years, Plosky Tolbachik started erupting in late November of last year, spewing clouds of ash up to three kilometres into the air, and spilling hot lava down its flanks.

"In the first years after the last eruption it was suggested that it would not erupt anymore for hundreds of years. But it has happened," said volcanologist Mefody Maguskin.

The last time Plosky Tolbachik erupted, it was active for five months, but it is unknown how long its current eruption will continue for.