| Abstract: | To establish the structure of volcanic vents in adventive craters, seismic studies have been carried out on Piip crater break-through formed in October–December 1966 on the northern flank of Kliuchevskoi volcano. The studies were carried out by refraction method on longitudinal and nonlongitudinal profiles. An approximate seismic section has been obtained together with several refracting horizons. An injection area of magmatic melt is established and its size in plan is 100×40 m, which is identified with the upper part of the channel feeding Piip break-through with magma. By parametric measurements on an incandescent lava flow the longitudinal wave velocitiesV=750?850 m/sec have been computed. Special investigations established an area of microearthquakes located on the northern extension of explosion funnel line. |
