Search by USGS 7½ Minute Quadrangle
This query is used to search for any stations located on a specified U.S.G.S. 7 1/2 Minute Quadrangle Sheet.
Select a state from the pick list to load the quad sheet pick list. Then select the quad sheet from the pick list or enter the name of the quad sheet in the text area.
This form uses a drill-down query function. After selecting an item from the state pick list, the quad sheet pick list will be re-populated and limited to values matching your state selection. It will take a brief moment for the pick lists to update following each selection.