The 1871 Ruang eruption began on 3 March, and ended on 14 March 1871 at the Ruang volcano in the

Molucca Sea The Molucca Sea (Indonesian language, Indonesian: ''Laut Maluku'') is located in the western Pacific Ocean, around the vicinity of Indonesia, specifically bordered by the Indonesian Islands of Sulawesi, Celebes (Sulawesi) to the west, Halmahera t ...

, Indonesia. The eruption triggered a locally devastating

tsunami A tsunami ( ; from , ) is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and underwater explosions (including detonations, ...

measuring . It flooded many villages on nearby islands, killing some 400 people.

Eruption

The eruption on 3 March began when volcanic materials began falling from the summit and into the sea. German

zoologist Zoology ( , ) is the scientific study of animals. Its studies include the structure, embryology, classification, habits, and distribution of all animals, both living and extinct, and how they interact with their ecosystems. Zoology is one ...

and

anthropologist An anthropologist is a scientist engaged in the practice of anthropology. Anthropologists study aspects of humans within past and present societies. Social anthropology, cultural anthropology and philosophical anthropology study the norms, values ...

Dr.

Adolf Bernhard Meyer Adolf Bernhard Meyer (11 October 1840, Hamburg – 22 August 1911, Dresden) was a German anthropologist, ornithologist, entomologist, and herpetologist. He served for nearly thirty years as director of the Königlich Zoologisches und Anthropologi ...

, an eyewitness to the eruption described Ruang as a conical island rising above the sea. At the time of the eruption, the island was uninhabited. The residents of nearby Tagulandang island however, owned plantations on Ruang island. A strong

earthquake An earthquakealso called a quake, tremor, or tembloris the shaking of the Earth's surface resulting from a sudden release of energy in the lithosphere that creates seismic waves. Earthquakes can range in intensity, from those so weak they ...

and loud rumbling sound occurred at 20:00 local time. Based on examining historical observations of the eruption, Pranantyo and others interpreted it as the partial collapse of the eastern volcanic flank. Simulation of a flank collapse and the triggered tsunami indicate the volume of the slide at best fit the historical descriptions of the tsunami heights on nearby islands. The

Global Volcanism Program The Smithsonian Institution's Global Volcanism Program (GVP) documents Earth's volcanoes and their eruptive history during the Quaternary Period of Earth's geologic history, with particular emphasis on volcanic activity during the Holocene Epoc ...

at the

Smithsonian Institution The Smithsonian Institution ( ), or simply the Smithsonian, is a group of museums, Education center, education and Research institute, research centers, created by the Federal government of the United States, U.S. government "for the increase a ...

assigned the eruption Level 2 on the

volcanic explosivity index The volcanic explosivity index (VEI) is a scale used to measure the size of explosive volcanic eruptions. It was devised by Christopher G. Newhall of the United States Geological Survey and Stephen Self in 1982. Volume of products, eruption c ...

(VEI). Eruptions continued on 9–10 and 14 March.

Tsunami

According to Dr. Meyer, the tsunami caused extreme devastation on Tagulandang island, located next to Ruang, very few homes survived the tsunami. Waves of up to swept into the seaside settlements, and inundated inland. Two additional tsunami waves struck the coast shortly after. The tsunami destroyed the village of Bahhuas; at least 75 homes were destroyed. Three homes remained at the coast but only one was safe for use; the two other homes suffered major damage. Many homes were overturned or obliterated. A church on the island with thick exterior walls was also demolished. Debris of homes were deposited all over the former settlement.

References

{{Volcanic eruptions in Indonesia 1870s disasters in Asia Tsunamis in Indonesia 19th-century volcanic events VEI-2 eruptions 19th-century tsunamis Volcanic tsunamis 1871 natural disasters 1871 in the Dutch East Indies Sangihe Islands Geography of North Sulawesi Volcanic eruptions in Indonesia

Eruption

Tsunami

See also

References