Heaven Lake

Heaven Lake
Location	North Korea / China
Coordinates	42°00′22″N 128°03′25″E / 42.006°N 128.057°E / 42.006; 128.057Coordinates: 42°00′22″N 128°03′25″E / 42.006°N 128.057°E / 42.006; 128.057
Type	crater lake
Primary inflows	precipitation
Basin countries	North Korea, China
Surface area	9.82 km2 (3.79 sq mi)
Average depth	213 m (699 ft)
Max. depth	384 m (1,260 ft)
Surface elevation	2,189.1 m (7,182 ft)

Korean name
Hangul	천지
Hanja
Revised Romanization	Cheonji
McCune–Reischauer	Ch'ŏnji

Heaven Lake (Korean: 천지, Ch'ŏnji or Cheonji; Chinese: 天池, Tiānchí; Manchu: Tamun omo or Tamun juce) is a crater lake on the border between China and North Korea. It lies within a caldera atop the volcanic Paektu Mountain, a part of the Baekdudaegan mountain range and the Changbai mountain range. It is located partly in Ryanggang Province, North Korea, at 42°00′22″N 128°03′25″E / 42.006°N 128.057°E / 42.006; 128.057, and partly in Jilin Province, northeastern China.

The caldera which contains Heaven Lake was created by a major eruption in 969 AD (± 20 years).

The lake has a surface elevation of 2,189.1 m (7,182 ft). The lake covers an area of 9.82 km² (3.79 sq mi) with a south-north length of 4.85 km (3.01 mi) and east-west length of 3.35 km (2.08 mi). The average depth of the lake is 213 m (699 ft) and maximum depth of 384 m (1,260 ft). From mid-October to mid-June, it is typically covered with ice.

In ancient Chinese literature, Tianchi also refers to Nanming (南冥 sometimes translated as "southern sea").

Some other well-known lakes named Tianchi include those in Xinjiang and Taiwan.

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