Ukraine
That's a fairly significant flair-off of excess gas. I question the reports use of language. An underground storage field did not explode.
What happened at worst is an above ground pipe broke and it's flaring-off in a spot that doesn't look too bad for that to be happening there. It's in an open place and it's green around there. (They will pretend that is what happened.)
The best case is they were forced to release a small amount of excess gas to manage the safe storage of a lot of gas. If gas is being produced and not enough of it is being sold they either need to shut down some production and / or flair off excess gas when the storage capacity they have becomes overly full. Sometimes they get caught by surprize and need to do both to prevent a larger problem.
Usually, (as they did it in the past,) if they need to flair off gas on a regular basis they will build a fair off tower to get the fire up off of the ground where it can spread by burning trees and things. I remember when they did that in the USA. (those kind of business practices are no longer allowed in the US.)
I remember there being a constant flair-off of unusable gas at a refinery near Ogden Utah which was comparable in size to that surface fire I see in these videos. There it was a case of the oil they were refining being loaded with a very poisonous gas. They were separating that unusable gas from the usable and then were destroying it by burning it in the open atmosphere.
That was a gross abuse for them to conduct their business like that. I also remember always rolling up the windows in the car because I hated the stench of that place.