Earthquake detection involves monitoring the Earth's movements to identify seismic activity. This is typically done using instruments called seismometers, which measure vibrations in the ground. When an earthquake occurs, these devices record the intensity and duration of the shaking, helping scientists understand the event's characteristics. Data from multiple seismometers are analyzed to determine the earthquake's location and magnitude. This information is crucial for issuing early warnings and assessing potential damage. Organizations like the United States Geological Survey (USGS) use this data to inform the public and improve safety measures in earthquake-prone areas.