Various types of geologic risk-causing phenomena has been described by geological risks such as Seismic hazards, volcanic hazards, water-related hazards and slope instability hazards.

Various types of geological risks are caused by different natural phenomena. Here are some examples:

1. Seismic Hazards: These are caused by the movement of tectonic plates beneath the Earth's surface. When these plates move, they can cause earthquakes. The risk is particularly high in areas near fault lines.

2. Volcanic Hazards: These risks are associated with volcanic activity. This can include eruptions, which can cause lava flows, ash clouds, and pyroclastic flows. These hazards can cause damage to property and loss of life, particularly in populated areas near active volcanoes.

3. Water-Related Hazards: These can include floods, tsunamis, and landslides. Floods can be caused by heavy rainfall, tsunamis by undersea earthquakes or landslides, and landslides by a variety of factors including heavy rain, earthquakes, and human activity.

4. Slope Instability Hazards: These are caused by the movement of soil or rock down a slope. This can be due to a variety of factors, including erosion, heavy rainfall, earthquakes, or human activity. These hazards can cause landslides, rockfalls, and other types of ground movement.

Each of these hazards presents a different type of risk, and the level of risk can vary depending on a variety of factors, including the location, the local geology, and human activity.