Groundquakes, also called seismic quakes, were a type of geological event in which parts of a planet's surface violently shook, often causing damage to buildings. During the Clone Wars, the Kindalo species caused a series of groundquakes on their homeworld Aleen in order to try and close a breach which had opened up between their subterranean world and the surface, allowing in air that was toxic to them. The quakes devastated the surface, and greatly effected the Aleena species that lived there, causing the Galactic Republic to send aid to the world. Among the aid workers were the droids R2-D2 and C-3PO, who after learning about the cause of the quakes, managed to reseal the breach and so end the quakes.
They occurred regularly on the planet Gorse when its moon Cynda approached during its elliptical orbit. During a quake, parts of the planet's surface would violently shake and rock, often causing damage to buildings. The quakes occurred as a way of releasing the energy that built up through the gravitational pull of Cynda and the Gorse system's star on Gorse. Droid workers would occasionally fall into the acid baths used by Moonglow Polychemical on Gorse during groundquakes, and when Lal Grallik—the manager of Moonglow‐was murdered in one of the baths by Count Denetrius Vidian, it was claimed she had accidentally fallen in during a quake. When Vidian later planned to destroy Cynda, the science officers on board the Imperial-class Star Destroyer Ultimatum predicted that the loss of the moon would cause increased groundquakes on Gorse.
Behind the scenesEdit
Groundquakes first appeared in the Star Wars Legends novel Lando Calrissian and the Mindharp of Sharu, which was written by L. Neil Smith and released in 1983. They were confirmed to be canon by their appearance in Mercy Mission, an episode of the Star Wars: The Clone Wars television series, which was aired in 2011 as part of the show's fourth season.
- Star Wars 29: Yoda's Secret War, Part IV
- Star Wars: The Clone Wars – "Mercy Mission" (First appearance)
- Adventures in Wild Space: The Rescue
- Tarkin (Mentioned only) (First identified as seismic quake)
- A New Dawn
- Battlefront II: Inferno Squad (Mentioned only)
- Star Wars 41: The Ashes of Jedha, Part IV (Mentioned only)
- The Legends of Luke Skywalker (Mentioned only)
- "Scorched"—Star Wars Insider 165 (Mentioned only)