Tandikat-Singgalang

Geography & Climate

Tandikat-Singgalang is located in Indonesia, within the Sunda Volcanic Arc of the broader Sunda-Banda Volcanic Regions. Situated at 0.43° S, 100.32° E in the Southern Hemisphere, the volcano lies within a tropical climate zone. At 2,879 meters above sea level, Tandikat-Singgalang rises above the surrounding terrain into montane or subalpine conditions. The elevation creates distinct ecological zones along its flanks, from forested lower slopes to exposed rocky terrain near the summit. The volcanic landform is characterized as a composite, which describes the physical shape and structure of the volcanic edifice as observed from the surface.

Geological Context

Tandikat-Singgalang sits in a subduction zone, where one tectonic plate dives beneath another, creating intense heat and pressure that generates magma. Subduction zones are responsible for many of the world's most explosive volcanoes and deadliest eruptions. For communities in Indonesia near Tandikat-Singgalang, this tectonic setting means the volcano is capable of producing powerful explosive eruptions, pyroclastic flows, and lahars that can threaten populated areas within tens of kilometers of the summit. The dominant rock type is andesite / basaltic andesite, a dark, fine-grained volcanic rock that forms from rapidly cooling, low-viscosity lava. Basaltic eruptions tend to be less explosive and produce fluid lava flows that can travel long distances. While less immediately dangerous than explosive eruptions, basaltic lava flows can destroy structures and infrastructure in their path, and volcanic gases released during these eruptions can affect air quality over a wide area.

Eruption History Summary

Tandikat-Singgalang has 4 recorded eruptions in the geological database, spanning from 1889 CE to 1924 CE. The most powerful recorded event was a gentle, effusive event in 1924 CE, reaching VEI 1 on the Volcanic Explosivity Index. These eruptions span roughly 35 years of volcanic history. The most recent eruption in 1924 CE places this volcano within the modern era of volcanological observation.

GVP Reference Summary

This volcanic complex is dominated by the Singgalang stratovolcano and the smaller Tandikat edifice ~4.5 km SSW. They are located ~15 km WSW across the Bukittinggi plain from Marapi volcano. No eruptions are known from Singgalang, which hosts a lake in the summit crater. The summit of Tandikat has a partially eroded 1.2-km-wide crater containing a large central cone capped by a 360-m-wide crater containing a small lake. The only known eruptions are from Tandikat; three events reported in the late 19th and early 20th centuries produced minor explosive activity.

— Smithsonian Institution, Global Volcanism Program