Accumulated electric energy underground (tens of kilowatthours or more), immediately changed to heat, may cause a great pressure difference, that is able to create much more significant and noticeable sounds.
Accumulated underground electric enerhiya (sampu-sampung ng kilowatthours o higit pa), Agad na mababago sa init, ay maaaring maging sanhi ng isang mahusay na presyon ng pagkakaiba, Iyon ay upang lumikha ng mas kapansin-pansin kapansin-pansing at tunog.