Galunggung, Java, Indonesia

 

Mt. Galunggung in the background (Selvi Rumondang)

Volcano Type:      Stratovolcano
Volcano Status:    Historical
Last Known Eruption:     1984
Summit Elevation:     2168 m     7,113 feet
Latitude:     7.25°S     7°15’0″S
Longitude:     108.058°E     108°3’30″E

The forested slopes of 2168-m-high Galunggung volcano in western Java are cut by a large horseshoe-shaped caldera breached to the SE that has served to channel the products of recent eruptions in that direction. The “Ten Thousand Hills of Tasikmalaya” dotting the plain below the volcano are debris-avalanche hummocks from the collapse that formed the breached caldera about 4200 years ago. Although historical eruptions, restricted to the central vent near the caldera headwall, have been infrequent, they have caused much devastation. The first historical eruption in 1822 produced pyroclastic flows and lahars that killed over 4000 persons. More recently, a strong explosive eruption during 1982-1983 caused severe economic disruption to populated areas near the volcano.

Mt. Galunggung from a distance (Selvi Rumondang)

Mt. Galunggung from a distance (Selvi Rumondang)

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Originally posted 2010-08-28 03:18:04.

Marapi, Indonesia

Volcano Type:   Complex volcano
Volcano Status: Historical
Last Known Eruption:  2004
Summit Elevation:  2891 m  9,485 feet
Latitude:  0.381°S  0°22’50″S
Longitude:  100.473°E  100°28’24″E

Gunung Marapi, not to be confused with the better-known Merapi volcano on Java, is Sumatra’s most active volcano. Marapi is a massive complex stratovolcano that rises 2000 m above the Bukittinggi plain in Sumatra’s Padang Highlands. A broad summit contains multiple partially overlapping summit craters constructed within the small 1.4-km-wide Bancah caldera. The summit craters are located along an ENE-WSW line, with volcanism migrating to the west. More than 50 eruptions, typically consisting of small-to-moderate explosive activity, have been recorded since the end of the 18th century; no lava flows outside the summit craters have been reported in historical time.
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Originally posted 2010-08-22 04:49:29.

Rinjani, Indonesia

Mt. Rinjani

Volcano Type: Stratovolcano
Volcano Status: Historical
Last Known Eruption: 2010
Summit Elevation: 3726 m   12,224 feet
Latitude: 8.42°S    8°25’0″S
Longitude: 116.47°E   116°28’0″E

Rinjani volcano on the island of Lombok rises to 3726 m, second in height among Indonesian volcanoes only to Sumatra’s Kerinci volcano. Rinjani has a steep-sided conical profile when viewed from the east, but the west side of the compound volcano is truncated by the 6 x 8.5 km, oval-shaped Segara Anak caldera.

Infrared satellite view of Mt. Rinjani

Infrared satellite view of Mt. Rinjani

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Originally posted 2010-10-12 03:01:16.

Semeru, Java, Indonesia

Mount Semeru Volcano

Volcano Type:      Stratovolcano
Volcano Status:    Historical
Last Known Eruption:     2010 (continuing)
Summit Elevation:     3676 m     12,060 feet
Latitude:     8.108°S     8°6’30″S
Longitude:     112.92°E     112°55’0″E

Semeru, the highest volcano on Java, and one of its most active, lies at the southern end of a volcanic massif extending north to the Tengger caldera. The steep-sided volcano, also referred to as Mahameru (Great Mountain), rises abruptly to 3676 m above coastal plains to the south. Gunung Semeru was constructed south of the overlapping Ajek-ajek and Jambangan calderas. A line of lake-filled maars was constructed along a N-S trend cutting through the summit, and cinder cones and lava domes occupy the eastern and NE flanks. Summit topography is complicated by the shifting of craters from NW to SE. Frequent 19th and 20th century eruptions were dominated by small-to-moderate explosions from the summit crater, with occasional lava flows and larger explosive eruptions accompanied by pyroclastic flows that have reached the lower flanks of the volcano. Semeru has been in almost continuous eruption since 1967.

Mount Semeru Volcano Eruption Cloud

Mount Semeru Volcano Eruption Cloud

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Originally posted 2010-08-21 05:01:43.