In order to determine the time sequence of recent eruption in Tianchi volcano

the TL thermal-stability has been investigated for pumice and sanidine phenocryst within the volcanics. The results show that the TL signals of pumice and sanidine phenocryst have better thermal-stability

so they can be used for TL dating. Based on the research

the times of four eruptive events have been dated by TL method in the past 5000a

that is:300-350a B.P.±?1000a B.P.±?3500-4000a B.P.± and 5000a B.P.±. These results are consistent with the historical records of the volcanic eruption and other dating methods within the error range.