Lamongan Volcano | John Seach


East Java, Indonesia

8.00 S, 113.34 E,
summit elevation 1651 m

Lamongan is a small volcano located between the large volcanoes of Tengger caldera and Iyang-Argapura. The volcano is in the eastern half of a volcanic region which stretches 25 km E-W and 16 km N-S. Lamongan volcanic field covers an area of 260 sq km, including 61 cinder or spatter cones, and 27 maars. Lamongan has a similar number of vents to volcanoes such as Etna and Mauna Kea.

The volcano was very active in the 19th century but there has not been a confirmed eruption since 1898. The period of intense activity between 1799 and 1898, produced up to 15 basaltic lava flows. Volcanic hazards at Lamongan volcano include base surges, ash flows, ashfall and ballistics related to phreatomagmatic activity, ashfall and ejecta from magmatic eruptions, and the release of gas from existing lakes.

Lamongan volcano poses a threat to neaby populations. The eruption risks include base surges, ashfall and release of gas from lakes.

2012 Unrest
On 9th March 2012 Lamongan volcano was raised to level 2 alert after an increase in volcanic earthquakes.

1933 Activity
Beginning 16th March 1933 underground rumbling and detonations were heard at Lamongan volcano. New fractures appeared at the volcano on the night of 17-18 March.

1924-25 Activity
Underground rumbling and detonations were heard at Lamongan volcano.

1898 Eruption
An eruption occurred at Lamongan volcano in 1898 on the SW flank 400 m (Mt. Anyar).

1869 Eruption
Eight people were killed by falling ejecta from a vent located at 400 m altitude.

Further reading
Carn, S.A. and Pyle, D.M., 2001. Petrology and geochemistry of the Lamongan Volcanic Field, East Java, Indonesia: primitive Sunda Arc magmas in an extensional tectonic setting?. Journal of Petrology42(9), pp.1643-1683.

Carn, S.A., 2000. The Lamongan volcanic field, East Java, Indonesia: physical volcanology, historic activity and hazards. Journal of Volcanology and Geothermal Research95(1-4), pp.81-108.

Lamongan Volcano Eruptions

2003?, 1953?, 1933?, 1924-25?, 1898, 1896, 1893, 1891, 1890-91, 1890, 1889, 1888, 1887-88, 1887, 1885-86, 1884, 1883, 1877, 1874, 1872, 1870-71, 1870, 1869, 1869, 1864, 1861, 1859, 1856, 1849, 1847, 1847, 1843-44, 1841-42, 1838, 1830, 1829, 1826, 1824, 1821-22, 1818, 1817, 1808, 1806, 1799.