Future volcanic activity in the field may result in hazardous Plinian eruptions.
[10] Other volcanoes in the wider region include Jingbo Lake, Keluo, Wudalianchi and Xianjindao.
[11] Based on these structures, it has been concluded that Changbaishan and Longgang are back-arc volcanoes associated with processes involving the sinking Pacific Plate slab.
[14] The field covers a surface area of 1,700 square kilometres (660 sq mi) with 164 individual centres.
[18] The towns of Houhe, Jilin and Jingyu are located in the eastern part of the field.
[18] This maar is surrounded by a 10–119 metres (33–390 ft) high rim composed of pyroclastic material[27] and was formed by phreatomagmatic activity.
[16] 0.85 square kilometres (0.33 sq mi) large Hanlongwan is a dry maar north of Jinlongdingzi and is surrounded by a 10 metres (33 ft) high rim.
[28] Xiaolongwan maar is surrounded by a 5–100 metres (16–328 ft) high crater rim and covers a surface area of 0.079 square kilometres (0.031 sq mi).
[25] Airmasses come from central Asia during winter, while in summer southeasterlies from the Pacific Ocean dominate.
[31] The average air temperatures at Xiaolongwan and Sihailongwan are 4 °C (39 °F), with the lakes freezing between November and April.
[47] Past environmental changes, such as peat growth[48] and red tides in lakes, also leave records.
[51] Tephra layers found in lakes indicate that explosive volcanism was common in the field during the late ice age.
[53] A tephra layer dated 15 BC - 26 AD is chemically similar to the one of Jinlongdingzi and may stem from an eruption in the Longgang field.
[55] A long lava flow was erupted from the western flank of Jinlongdingzi and went on for at least 26 kilometres (16 mi).
[52] A new eruption may result in damage to property or fatalities especially east of the cone and the field is thus considered a potentially active volcano.
[22][24] Hot springs are found in the area,[5] and there is ongoing uplift at a rate of 3–4 millimetres per year (0.12–0.16 in/year),[56] and the field is among the most seismically active regions of Jilin.
[57] Seismic tomography shows evidence of crustal melts persisting beneath Longgang,[58] and magnetotelluric analysis has found areas of partial melts, one under Jinlongdingzi and a larger one under the uplifting area.