A device for an avalanche triggering system adapted to cooperate with a blasting chamber and including a support frame adapted to be detachably mounted on the blasting chamber, a diffusion chamber, partially delimiting an inner mixing cavity in which is housed a gas mixer configured to produce a gas mixture, the diffusion chamber further having a diffusion opening configured to allow the passage of the gas mixture to the outside of the diffusion chamber, and an ignition system configured to trigger an explosion of the gas mixture, where the diffusion chamber allows placing the device in an operating position configuration in which the device rests, by gravity, on the blasting chamber.