article_snippet: A tourist has videoed the exact moment a Japanese volcano erupts - including the rare phenomenon of volcanic lightning.
article_snippet: The German videographer was able to capture the  volcanic lightning, as well as an explosive shockwave which rippled through the sky.
article_snippet: Marc explained what it was like to photograph such an active and dangerous volcano - which erupted between March 2 and 7 2015.
article_snippet: The German videographer found a perfect vantage point so as to catch the beautiful, yet ferocious moments, of eruption .
article_snippet: Marc said: 'There was a delay of several seconds between seeing the eruption and the arrival of the shockwave and sound. '
article_snippet: Szeglat was able to capture the volcanic lightning, as well as an explosive shockwave which rippled through the sky . '
article_snippet: the volcanic lightning, as well as an explosive shockwave which rippled through the sky is very rare and does not appear in a normal ash cloud but in clouds from pyroclastic flows - which are mixtures of rock fragments and hot gases. '
article_snippet: Pyroclastic flows are the most dangerous hazards on volcanoes