Geologic conditions that represent a risk to people, property, and infrastructure are known as geologic hazards. Numerous types of geologic hazards exist in the state, including landslides, earthquakes, expansive soils, windblown deposits, radon, karst, and volcanic eruptions. Because of the rural nature of Wyoming, many of the geologic hazards in the state occur without danger to the public. However, when they occur near people or infrastructure – roads, railways, pipelines – they can cause damage. The two most frequent and costly geologic hazards in Wyoming are earthquakes and landslides.