A denser concentration of meteoroid particles within a meteor stream. Particles comprising a meteor swarm will usually have been released from the parent body comparatively recently, and have not yet become dispersed by gravitational and other perturbations. Examples of streams in which meteor swarms are found include the Giacobinids and Leonids. Passage of the Earth through these more highly populated regions in the streams gives rise to periodic meteor storms.
Subjects: Astronomy and Astrophysics.