The geomagnetically trapped a...r10malous cosmic rays have been monitored continuously by
instrumentation on the SAMPEX satellite since its launch in mid-1992. With the approach of
solar mimmum the intensity has been increasing along with that of the interplanetary anomalous
cosmic ray source. We compare the time variations of the two components using data from the
MAST instrument: describe improved measurements of the spatiaJ distribution of the trapped
component, and discuss implications for the trapping and lifetime of the trapped component
