. The usual voltage of lightning strikes is said to be around 15kA. One Twitter user said: 'Biggest lightning bolt I ever heard just cracked down in south London, sounded like an explosion! More please oh mighty Thor' Another said: 'What the f*** was that? Lightning?' Stephen, who lives in Mitcham, told Metro.co.uk: 'So I'd just got home from work and was having dinner, it had been raining all day but no thunder or lighting, just one of those long drizzly days. 'At about 8.45pm there was a sudden flash and a huge rolling boom. It sounded just a huge cannon had gone off, like the ones they fired for the Queen. 'For a moment, because of all the madness with Russia and Poland, I had a genuine thought of, 'Oh god, what if it's an attack! Or some kind of electrical explosion?' 'I went on to Twitter to find lots of tweets about it as well, reassuringly it was just thunder but wow, someone really annoyed Thor last night.' MORE : Two days of 'atrocious' weather to hit UK with warning homes could flood MORE : Katie Price ready for all weathers in excellent plastic poncho with Carl Woods after being 'turned down for surgery in Thailand' MORE : Why is the weather so warm this November? One person said they heard the lightning in Canary Wharf, during the sudden 10-minute storm. Nearly 20 miles away in Twickenham, south west London the bolt shook one person's house so much it sent brick dust down their chimney. They said: 'Saw the f){kind=link}
NEWS… BUT NOT AS YOU KNOW IT
If your evening was disturbed by a massive clap of thunder last night, it’s because an of an epic lightning bolt.
The energy created by the ‘positive strike’ was around six times more powerful than a normal clap of thunder.
It echoed across most of South London and into Surrey yesterday evening at around 9.30pm.
Huge downpours rained down with parts of London left flooded by the bad weather.