We were almost carried away by the river of fire in Kamchatka

'A little adventure during the very first night at Tolbachik', is how Andrey described it with a touch of understatement.

'For us who were at the volcano explosion site for the first time it was quite unnerving. We had been waiting for the dark to come at the site where a lava tube was coming out of the surface. It was a full moon and perhaps it does make a difference on how active the explosion was. Perhaps it was the same principle that works with the tide in the ocean. 

'We had been standing up quietly, sipping vodka. 

'Lava was flowing past calmly'.

Andrey suggested to experienced volcanologists that they should know which way to run.  

'I could hardly understand how and where one might escape', he said.

The experts dismissed his concerns. 

'It calmed me down for a bit - until the ground under our feet started to crack', Andrey recalls.

'The lava stream was only touching the surface close to the place where we stood. It kept moving above us, too, just under the crust. 

'So at some point we realised that something was in the way of lava stream, and it was getting through every hole and crack it could find - or break through. 

'It looks like that the crater, on the edge of which we were standing, actually saved our lives because at least lava started leaking inside it, instead of swelling up the slope. 

'It was also lucky that the crater was big enough to let the stream go through it without obstacles. And we were extremely lucky that the canyon was not blocked completely, so that a part of the lava continued moving through. 

'At some point the crater got completely filled - when the lava with a sound of porridge leaking out of the pan started to flow out. 

'Our experienced volcanologists were still laughing at how scared we were at this point - until a fountain of gas beamed out from the centre of it, which meant that lava could have started gushing out - and we would be right under the lava rain! 

'This is when panic got to all of us. And the lava stream went down right on the people that stood down the canyon, taking pictures of it. 

'You can see in the centre of one picture a little white flame - this was a backpack of Victor Mikhailovich from the Volcanology and Seismology Institute which worked at the previous Tolbachik explosion in 1975 and told us a lot about it. 

'Alas there was no way to rescue the bag, it all happened just too quick'.

The photographers escaped safely, though, with their sensational pictures. Thank you to Liudmila and Andrey for sharing them with us. 

See the rest of their images from Tolbachik volcano eruption, and visit their blog.