Landslides can happen when rainwater softens the soil, causing it to slide. A study looked at a landslide called Songmu and found that rain seeping into the clay layer made the soil weak and led to sliding. The researchers used different methods to analyze the stability of the landslide in natural and rainy conditions. They found that the landslide is stable in normal conditions but unstable when saturated with water. Understanding how landslides form can help predict and prevent them in the future.