Sirung volcan

stratovolcan 862 m / 2,828 ft

Condition actuelle: normal / en sommeil (1 sur 5)
Last update: 18 Sep 2021 (phreatic explosion today)

Sirung is a frequently active volcano on Pantar Island, 77 km north of the island of Timor. Sirung has a 2 km wide caldera which usually contains an acid crater lakes in the rain season. Gunung Sirung is a lava dome located on the caldera's western rim.

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Style éruptif tipique: Explosive
Eruptions du volcan Sirung: 2004 (?), 1970, 1965, 1965, 1964, 1960, 1953, 1947, 1934, 1927 (?), 1899 (?), 1852 (?)

HeureMag. / ProfondeurDistance/Lieu
lundi, 20. septembre 2021 13:34 GMT (1 séisme)
20 sept. 2021 21:34 (GMT +8) (20. sept. 2021 13:34 GMT)
2.9

139 km
45 km (28 mi)
Banda Sea, 51 km à l'ouest de Pura , East Nusa Tenggara, Indonésie
jeudi, 16. septembre 2021 18:46 GMT (1 séisme)
17 sept. 2021 02:46 (GMT +8) (16. sept. 2021 18:46 GMT)
2.3

67 km
44 km (27 mi)
Savu Sea, 73 km à l'ouest de Atambua, Indonésie
lundi, 13. septembre 2021 22:09 GMT (1 séisme)
14 sept. 2021 06:09 (GMT +8) (13. sept. 2021 22:09 GMT)
2.6

89 km
42 km (26 mi)
Savu Sea, 76 km au sud-ouest de Pura , East Nusa Tenggara, Indonésie

Introduction

Sirung volcano is located at the NE end of a 14-km-long line of volcanic centers that form a peninsula at the southern end of Pantar Island. The low, 862-m-high volcano is truncated by a 2-km-wide caldera whose floor often contains one or more small lakes. Much of the volcano is constructed of basaltic lava flows, and the Gunung Sirung lava dome forms the high point on the caldera's western rim. A number of phreatic eruptions have occurred from vents within the caldera during the 20th century. Forested Gunung Topaki, the 1390-m high point of the volcanic chain, lies at the SW end and contains a symmetrical summit crater.
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Source: GVP

Sirung hot springs & crater lake
Strong fumaroles and boiling springs are found in Sirung's large crater. The crater contains often a highly acid (pH = 0.75), warm (40 deg C), grey-coloured crater lake where volcanic gasses escape in bubbles. The gasses are unusually rich in chlorine. The lake is similar to Kawah lien crater lake in East Java. ...plus

Beangabang Bay hot springs
A second area of hot springs is found on the beach of Beangabang Bay east of Sirung's crater. Water from these springs mixes with seawater.

2004 uncertain eruption
Eruptions of "smoke and dust" were reported by press around 13 May 2004, but according to the Indonesian Volcanological Survey, these reports were false.

1987 earthquake
A volcanologist from the Indonesian Volcanological Survey visited the volcano on 12 December, following an earthquake of M6.5 on 26 November. Fumaroles and the crater lake were normal and showed no evidence of increased activity. The only notable change in the crater was a fresh landslide scar that perhaps had resulted from the earthquake.

1934 eruption
Sirung volcano erupted on 14-15 June 1934. Detonations were heard in Ilakalau village and the following morning the crater rim was observed to be covered by white fresh ash deposits. On 16 June lapilli fell in Ilakalau village. On 17 June dense ash clouds were erupted 5-10 minutes. On 26 June, 30 m high lava fountains or strombolian activity were observed at the crater.

See also: Sentinel hub | Landsat 8
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