The Great Earthshake (as called by the dinosaurs) was a huge earthquake taking place near the start of The Land Before Time. According to the Narrator it was created by two continents coliding. It took place at dawn and separated and killed many herds, including the main character's. It created a huge crack called the Great Divide, leading down to the "Big Underground". Many dinosaurs fell down the cracks, among them Sharptooth. Littlefoot and Cera nearly fell as well but Littlefoot's Mother saved them. There was also a stampede of Apatosaurus, Triceratops, Saurolophus, Parasaurolophus, Pteranodon, Dimorphodon, Struthiomimus, Edaphosaurus, and Heterodontosaurus. By the earthshake's climax, one side of the divide started slowly rising up, separating herds everywhere. Among the dinosaurs stuck on the high portion included Grandma and Grandpa Longneck, Daddy Topps and Cera's mother, (all of whom survived the earthshake), while Littlefoot, Cera and Littlefoot's Mother were trapped on the lower portion.
Other earth shakes include the Flying Rocks from The Land Before Time III: The Time of the Great Giving, one in the cave in The Land Before Time IV: Journey Through the Mists, one that stranded the kids on the Mysterious Island in The Land Before Time V: The Mysterious Island , Three horn peak right before it erupted in The Land Before Time VII: The Stone of Cold Fire, and one in The Land Before Time IX: Journey to Big Water, and some in the TV Series.None of the Land Before Time Earthshakes, including the Great Earthshake, had any onscreen aftershocks.