The Marvel Comics character of Thor is based on the Norse mythological character of Thor, the God of Thunder. The comic book version of Thor shares many biographical details and other characteristics with the mythological Norse god, including possession of an enchanted hammer known as Mjolnir.
In addition to possessing the hammer of the mythological Thor, the comic book character has powers that include the ability to control and otherwise manipulate the weather. Other details, such as Marvel's Thor originating from an Olympus-like god realm called Asgard, are derived from traditional Norse myths. The Marvel version of Thor is arguably more fleshed out than the mythological character.