Skip to main content
← Back to map
⇄ Compare

Wai Sano

Sano, Wai

Caldera · Indonesia · 1319m

Wai Sano, the westernmost Holocene volcano on Flores Island, contains a 3.5 x 2.5 km caldera with a lake. The SE caldera wall truncated the slopes of Poco Sesak (also called Gunung Cerak), and the low point on the caldera rim is on the E side. Two solfataras are located at the SE shore of the lake.
Wai Sano, the westernmost Holocene volcano on Flores Island, contains a 3.5 x 2.5 km caldera with a lake. The SE caldera wall truncated the slopes of Poco Sesak (also called Gunung Cerak), and the low point on the caldera rim is on the E side. Two solfataras are located at the SE shore of the lake. · Photo: Photo published in Kemmerling 1929, "Vulkanen van Flores" (courtesy of Volcanological Survey of Indonesia).
Type
Caldera
Country
Indonesia
Region
Sunda & Banda / Sunda Volcanic Arc
Elevation
1319m
Coordinates
-8.735, 120.007
Last eruption
Unknown
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Composite
Major rock type
Dacite
Geological summary

The Wai Sano composite volcano at the western end of Flores Island includes a 2.5 x 3.5 km elliptical caldera in the NW part of a larger 9-10 km edifice. The caldera contains Sanonggoang Lake, with a surface more than 200 m below the high point on the southern caldera rim. The Poco Sesok and Poco Dedeng peaks are near the center of the eroded massif. The area has been a target of geothermal investigations, and two solfataras are located at the SE shore of the lake. No eruptions have been reported or dated, but the area was mapped as Holocene (Ratman and Yasin, 1978).

Eruption history

Detailed timeline

No eruption records available.

External links

⚠ For reference only. Not for emergency response.