[en] A 16-station network operates in the Texas Panhandle to monitor earthquake activity in the area. This report describes the network and its operation as well as analysis of data obtained during the period of January 1 to June 30, 1986. The network continued to operate satisfactorily during this period. Several local and regional earthquakes were detected and located during this period. These earthquakes occurred in the northern half of the Texas Panhandle and were small (magnitude /<=/3.0). None of the earthquakes was felt. Mansfield Station continued to detect a number of very small earthquakes occurring near the station, but it was not possible to locate them since no other station detected them. All elements of the microearthquake network were tested and checked in March and June as part of the Stone and Webster Engineering Corporation (SWEC) quarterly maintenance program. At several stations modifications were carried out to improve the quality of recorded data. These included placing the seismometer at a depth of 50 ft and raising the antenna to a height of 50 ft. 4 refs., 7 figs., 9 tabs