Tag: swarms typically do not have a single standout event.

“#Natural fluid injections triggered Cahuilla earthquake swarm” Credit: Unsplash/CC0 Public Domain A naturally occurring injection of underground fluids drove a four-year-long earthquake swarm near Cahuilla, California, according to a new seismological study that utilizes advances in earthquake monitoring with a machine-learning algorithm. In contrast to mainshock/aftershock sequences, where a large earthquake is followed by many…