| Segara Anak | |
|---|---|
 | |
  Segara Anak | |
| Location | Lombok Island |
| Coordinates | 8°24′15″S 116°22′51″E / 8.4041448°S 116.3807939°E |
| Lake type | Crater lake |
| Basin countries | Indonesia |
| Surface area | 11.3 km2 (4.4 sq mi) |
| Max. depth | 230 m (750 ft) |
| Water volume | 36×106 m3 (1.3×109 cu ft) |
| Surface elevation | 2,004 m (6,575 ft) |
Segara Anak is a crater lake in the caldera that formed during the explosive volcanic eruption of Mount Samalas in 1257. The caldera is next to Mount Rinjani on Lombok Island in Indonesia. "Segara Anak" means "child of the sea" and refers to the blue lake's resemblance to the sea. The volcanic cone Gunung Barujari is at the eastern end of the lake and is responsible for its crescent shape. The lake temperature is 20–22 °C (68–72 °F), which is 5–7 °C (9.0–12.6 °F) higher than normal for a lake at its altitude. Hot magma below the lake is responsible for this anomaly. Gas bubbles escape from the lake floor, helping the lake to have a pH of 7–8.[1]
The surface of Segara Anak is 2,004 metres (6,575 ft) above mean sea level (AMSL) and is Indonesia's second-highest caldera lake with an active volcano. The peak of Gunung Baru Jari is 2,376 metres (7,795 ft) AMSL. The lake covers 45 square kilometres (17 sq mi), with dimensions of 7.5 by 6.0 kilometres (4.7 by 3.7 mi), and has a maximum depth of 230 metres (750 ft).[2]
- ^ "The 2009 eruption of Rinjani volcano (Lombok, Indonesia)". Université Libre de Bruxelles. 2009-08-31. Archived from the original on 2021-10-23. Retrieved 2020-12-17.
- ^ "Lake Segara Anak: The Charm of Mt. Rinjani's Giant Caldera". TEMPO. 2016-11-29. Retrieved 2020-12-16.