An earthquake swarm is a series of small earthquakes that occur in a specific area over a short period of time. Earthquake swarms are caused by the shifting of tectonic plates and can occur at any time without warning. There are various synonyms that can be used to describe an earthquake swarm, including seismic swarm, tremor series, quake sequence, seismic tremors, tremor swarm, and earthquake frenzy. Regardless of the term used, earthquake swarms can be frightening and lead to serious damage, injuries, and even death. It's important to stay informed and prepare in case of an earthquake swarm or any other natural disaster.