ShakeMap is a tool developed by the United States Geological Survey (USGS) to visualize the ground shaking caused by earthquakes. It uses data from seismic sensors to create real-time maps that show the intensity of shaking in different areas. This information helps emergency responders and the public understand the impact of an earthquake. The maps produced by ShakeMap display various levels of shaking intensity, ranging from light to severe. They are crucial for assessing damage, guiding rescue efforts, and informing communities about potential hazards following an earthquake.