Study on Present Activity of Longgang Volcano in Jilin Province

Longgang volcanic area is in Jilin province of China, during the past 30 years, tectonic earthquakes in this area is more active than its adjacent tectonic units.Through first-class precise level survey data and the analysis of seismic activity during the past 50 years in the region, we find that the crust of longgang volcano group region is rising, and the rising velocity is up to 40 mm/yr which is significantly faster than that in other parts of the earth's crust.This phenomenon may indicate that the longgang volcano activity has increasing trend.