A gas explosion is an explosion resulting from a gas leak in the presence of an ignition source. The principal explosive gases are natural gas, methane, propane and butane, because they are widely used for heating purposes. However, many other gases, like hydrogen, are combustible and have caused explosions in the past. Industrial gas explosions can be prevented with the use of intrinsic safety barriers to prevent ignition.
An incomplete list of gas explosions
References
Gas explosion Wikipedia(Text) CC BY-SA