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Suwoh

Suoh

Caldera · Indonesia · 1000m

Steam plumes rise above the Danau Asam fumaroles on the west side of lake Asam within the 8 x 16 km Suoh depression in SE Sumatra. The depression appears to be primarily of tectonic origin, but contains historically active maars and silicic domes along its margins. Hot springs occur along faults and the Pematang Bata fumarole field are within the depression. Prior to a large explosive eruption in 1933 the floor of the Suoh depression was a broad marsh 13 km long in a NNW-SSE direction.
Steam plumes rise above the Danau Asam fumaroles on the west side of lake Asam within the 8 x 16 km Suoh depression in SE Sumatra. The depression appears to be primarily of tectonic origin, but contains historically active maars and silicic domes along its margins. Hot springs occur along faults and the Pematang Bata fumarole field are within the depression. Prior to a large explosive eruption in 1933 the floor of the Suoh depression was a broad marsh 13 km long in a NNW-SSE direction. · Photo: Anonymous, 1990. · Wikimedia Commons
Type
Caldera
Country
Indonesia
Region
Sunda & Banda / Sunda Volcanic Arc
Elevation
1000m
Coordinates
-5.250, 104.270
Last eruption
2024
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Cluster
Major rock type
No Data (checked)
Geological summary

The 8 x 16 km Suoh (or Suwoh) depression appears to have a dominantly tectonic origin, but contains a smaller complex of overlapping calderas oriented NNE-SSW. Historically active maars and silicic domes lie along the margins of the depression, which falls along the Great Sumatran Fault that extends the length of the island. Numerous hot springs occur along faults within the depression, which contains the Pematang Bata fumarole field. Large phreatic explosions (0.2 km2 tephra) occurred at the time of a major tectonic earthquake in 1933. Very minor hydrothermal explosions produced two 5-m-wide craters at the time of a February 1994 earthquake.

Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
1933~1942 · 1 eruptions · max VEI 42015~2024 · 1 eruptions · max VEI 119331951197919972015

Detailed timeline

  1. 2024VEI 1Observed
    2024-05-24 – 2024-05-24
    Nirwana Crater
  2. 1933VEI 4Observed
    1933-07-10 – 1933-08-05
    Pematang Bata

External links

⚠ For reference only. Not for emergency response.