There have been many eruptions in the history of Changbai Mountain area. According to historical records, the two eruptions of Tianchi volcano in 1668 and 1702 are credible. According to the study of volcanic geology and 14C chronology, Tianchi volcano has erupted at least twice since Holocene (1 199, about 5000 years ago). The Tianchi volcano erupted in1199 ~1201year, which was the biggest eruption event in the world in recent 2000 years, and the volcanic ash spewed out landed as far as the Sea of Japan and northern Japan.

65438-0997, the national key project "Monitoring and Research of Some Modern Active Volcanoes in China" was started. Seismological Bureau of China started monitoring and research in Tianchi Volcano Area of Changbai Mountain. After several years of research, experts believe that Changbai Mountain is a dormant active volcano. Although it has been dormant for 300 years, it is not uncommon for volcanoes that have been dormant for hundreds of years in the world to erupt again. Geophysical exploration shows that there are signs of crustal magma sac under Tianchi Lake in Changbai Mountain. Tianchi Lake in Changbai Mountain is in danger of erupting again, and the eruption form is explosive, because there are 2 billion tons of water in Tianchi Lake, which is more destructive. During the Ninth Five-Year Plan period, the Seismological Bureau of China and the Seismological Bureau of Jilin Province set up volcano monitoring stations in Tianchi, Changbai Mountain, including digital earthquake monitoring network, fixed-point deformation observation system, GPS mobile observation network and geochemical observation network. The implementation of the Ninth Five-Year Plan ended the undefended situation of Tianchi volcano.

Judging from the current observation results, there is no sign of volcanic recovery, and people can safely enjoy the rich resources and beautiful scenery endowed by nature to Tianchi Lake in Changbai Mountain.