The alert radius allows you to select the area included in your crime alerts. The alert radius spreads out in a circle from the last location searched. The radius can spread from .5 miles and expands up to 5 miles. For example if your radius is 1 mile, your alert will include all crimes occurring within 1 mile of the center point. To change locations, use the Search Crimes panel to search for the desired location. Once the map is centered on the correct location, drag the slider to select the radius around the center point for which you wish to receive alerts.