Figure. This map shows the locations of baselines that are measured in the Long Valley Caldera, near Mammoth Lakes, Calif., using a two-color laser distance measuring instrument (geodimeter). The two-color geodimeter measures distances to a precision of 0.5 to 1.0 mm for ranges between 3 and 8 km. The locations of these baselines are shown in relation to sources of inflation that have been modeled using both these data and leveling data.
Plots of the changes in length of 8 frequently measured baselines are available through the links listed below. These baselines, which use the central station at CASA as a common end point, have been measured approximately 3 times each week since early 1984.
