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Background:

Gunung Bromo (Mount Bromo) volcano is a small, but active volcanic cinder cone on the Indonesian island of Java. Bromo is located in the center of the Sandsea Caldera, itself only a portion of the larger Tengger Caldera. The Sandsea caldera formed around 8,000 years ago, in what must have been a massive eruption. Subsequent volcanic activity formed the cluster of cinder cones in the caldera's center, including Bromo.
The historical record indicates eruptions of Bromo every few years since 1804, and geologic evidence indicates eruptions at least several hundred years earlier. The most recent eruption occured in 2004, and tragically killed two tourists.


The image above shows most of the Sandsea Caldera, along with Gunung Bromo and the older volcanoes on the caldera floor. A small plume of steam is visible rising out of Mt. Bromo. Space Imaging's IKONOS satellite, capable of 4-meter per-pixel color imagery, and 1-meter per-pixel resolution panchromatic imagery, acquired the data on July 8, 2001.


Bromo volcano, East Java, Indonesia: news & activity updates

Updated: Oct 26, 2025 18:39 GMT-

Tengger Caldera Volcano (Indonesia) activity update Sep 30, 2025 - Unrest

Wed, 1 Oct 2025, 16:15
The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that unrest continued at Tengger Caldera on 30 September 2025 (local). The alert level remained at "Level 2 - Alert" (on a 4-level scale). Read all

Tengger Caldera Volcano (Indonesia) activity update Sep 29, 2025 - Unrest

Tue, 30 Sep 2025, 10:15
The Center for Volcanology and Geological Hazard/Pusat Vulkanologi dan Mitigasi Bencana Geologi (CVGHM/PVMBG) reported that unrest continued at Tengger Caldera on 29 September 2025 (local). The alert level remained at "Level 2 - Alert" (on a 4-level scale). Read all
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Bromo volcano
Stratovolcano 2329 m / 7,641 ft
East Java, Indonesia, -7.94°S / 112.95°E
Map of Bromo volcano Current status: restless (2 out of 5) Bromo volcano eruptions:
1804, 1815, 1820, 1822, 1825, 1829, 1830, 1835, 1842, 1843, 1844, 1856, 1857, 1858, 1858, 1859, 1860, 1865, 1865, 1866, 1867-68, 1877, 1885, 1885-86, 1886, 1886-87, 1888(?), 1890, 1893, 1896, 1906-07, 1907, 1907-08, 1909, 1910, 1915-16, 1921, 1922, 1928, 1930, 1935, 1939, 1940, 1948, 1950, 1955, 1956, 1972, 1980, 1983(?), 1983, 1984, 1995 (March-May), 1995 (Sep-Dec), 2000 (Nov)-2001 (Jan), 2004 (June), 2010 (Nov)-2011 (Jun) , 2015 (Nov)- 2016 (Nov), 2019 (Mar-Jul), 2020 (Dec), 2021 (Apr-Oct)
Typical eruption style
Explosive. Frequent small, phreatic eruptions at Bromo cinder cone on the bottom of the caldera.
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Zoom onto the cone of Bromo volcano (from the satellite image to the left).
Zoom onto the cone of Bromo volcano (from the satellite image to the left).
NASA space image of Bromo volcano, located inside the Tengger caldera.
NASA space image of Bromo volcano, located inside the Tengger caldera.
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