Mount Wilis

Last updated
Mount Wilis
Wilis.jpg
Mount Wilis viewed from the west
Highest point
Elevation 2,563 m (8,409 ft) [1]
Coordinates 7°48′29″S111°45′29″E / 7.808°S 111.758°E / -7.808; 111.758
Geography
Indonesia Java relief location map.png
Red triangle with thick white border.svg
Mount Wilis
Indonesia relief location map.jpg
Red triangle with thick white border.svg
Mount Wilis
Mount Wilis (Indonesia)
Geology
Rock age ~700,000 years
Mountain type Stratovolcano
Volcanic arc Sunda Arc
Last eruption Pleistocene

Mount Wilis is a dormant solitary stratovolcano surrounded by low-elevation plains. It is located in East Java, Java island, Indonesia. Like most volcanoes along the Java trench, Mount Wilis is the result of subduction as the Indo-Australian plate subducts under the Sunda plate at around 6.7 cm/yr. [2]

Contents

Geology

While no eruptions have taken place in historic times, hot springs and warm ground water indicates that a magma chamber still exists beneath the volcano. [3]

Mount Wilis is unique in that it has erupted many different types of magma. Lawu, another volcano ~70 km to the west, has erupted almost entirely andesite. Mount Wilis in contrast has erupted basalt, basaltic andesite, andesite, and dacite. [4]

Geothermal energy

Due to the vast amounts of hot springs and warm underground water near Wilis, there is the potential for geothermal power. Mount Wilis is a great location due to the fact there are no recorded eruptions in historic times, and an active geothermal system underground. It is thought that geothermal potential from Mount Wilis is between 50 MW from the 1015 MW potential total in East Java. This is enough power to light 15,000 houses in 5 separate regencies around the volcano. The occurrence of geothermal systems is detected by discharge of fluids, which included fumaroles, steaming from the ground, hydrothermal alterations, and hot springs. [5]

See also

References

  1. ↑ "Wilis". Global Volcanism Program . Smithsonian Institution . Retrieved 2006-12-26.
  2. ↑ Kopp, Heidrun (January 2011). "The Java convergent margin: structure, seismogenesis and subduction processes" (PDF). Geological Society, London, Special Publications. 355 (1): 111–137. doi:10.1144/SP355.6 . Retrieved 23 November 2025.
  3. ↑ Santoso, D.; Wahyudi, E.J.; Kadir, W.G.A.; Alawiyah, S.; Nugraha, A. D.; Supendi, P.; Parnadi, W.W. (31 December 2018). "Gravity Structure around Mt. Pandan, Madiun, East Java, Indonesia and Its Relationship to 2016 Seismic Activity". Open Geosciences. 10 (1): 882–888. doi:10.1515/geo-2018-0069 . Retrieved 23 November 2025.
  4. ↑ Hartono, Udi (1 January 1994). "The petrology and geochemistry of the Wilis and Lawu volcanoes, East Java, Indonesia" . Retrieved 23 November 2025.
  5. ↑ Ashari, Muhammad. "Geothermal Mapping for Mt. Wilis | PDF | Geothermal Energy | Satellite Imagery". Scribd. Retrieved 23 November 2025.


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