Sakar, Papua New Guinea

Volcano Type: Stratovolcano
Volcano Status: Holocene
Last Known Eruption: Unknown
Summit Elevation: 992 m   3,255 feet
Latitude: 5.414°S 5°  24’50″S
Longitude: 148.094°E   148°5’40″E

Sakar volcano is located 36 km west of Cape Gloucester on the west coast of New Britain, and 17.5 km NNE of Rooke Island. The island is 9.6 km from north to south, and 8 km east to west. The volcano is regarded as dormant.
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Originally posted 2010-10-07 06:28:39.

Bam, Papua New Guinea

Volcano Type: Stratovolcano
Volcano Status: Historical
Last Known Eruption: 1960
Summit Elevation: 685 m   2,247 feet
Latitude: 3.613°S 3°  36’45″S
Longitude: 144.818°E    144°49’6″E

The small 2.4 x 1.6 km island of Bam is the summit of a mostly submerged volcano that is one of the more active in Papua New Guinea. Bam is the SE-most of the Schouten Islands, and lies off the coast of New Guinea, about 40 km NNE of the mouth of the Sepik River. A steep-walled summit crater that is 300 m wide and 180 m deep is the source of Bam’s recent eruptions, which have kept the upper half of the cone sparsely vegetated.

A NE-trending landslide scarp extends across the upper part of the andesitic volcano from the SW coast, and a large submarine debris-avalanche deposits lies to the south and SW. The younger summit cone partially buries the eastern side of the collapse scarp. A recent lava platform on the north flank supports the small island’s only villages. Historical eruptions, recorded since 1872, have been restricted to small-to-moderate explosive activity from the summit crater.

Originally posted 2010-10-07 06:13:51.

Lamington, Papua New Guinea

Lamington

Volcano Type:   Stratovolcano
Volcano Status: Historical
Last Known Eruption:  1956
Summit Elevation:  1680 m  5,512 feet
Latitude:  8.95°S  8°57’0″S
Longitude:  148.15°E  148°9’0″E

Lamington is an andesitic stratovolcano with a 1.3-km-wide breached summit crater containing a lava dome. Prior to its renowned devastating eruption in 1951, the forested peak had not been recognized as a volcano. Mount Lamington rises to 1680 m above the coastal plain north of the Owen Stanley Range. A summit complex of lava domes and crater remnants rises above a low-angle base of volcaniclastic deposits that are dissected by radial valleys. A prominent broad “avalanche valley” extends northward from the breached crater. Ash layers from two early Holocene eruptions at Lamington have been identified. After a long quiescent period, the volcano sprang suddenly to life in 1951, producing a powerful explosive eruption during which devastating pyroclastic flows and surges swept all sides of the volcano, killing nearly 3000 persons. The eruption concluded with growth of a 560-m-high lava dome in the summit crater.

Lamington Volcano

Lamington Volcano

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Originally posted 2010-08-31 05:21:51.

Ulawun, Papua New Guinea

Ulawun

Volcano Type:      Stratovolcano
Volcano Status:    Historical
Last Known Eruption:     2010
Summit Elevation:     2334 m     7,657 feet
Latitude:     5.05°S     5°3’0″S
Longitude:     151.33°E     151°20’0″E

The symmetrical basaltic-to-andesitic Ulawun stratovolcano is the highest volcano of the Bismarck arc, and one of Papua New Guinea’s most frequently active. Ulawun volcano, also known as the Father, rises above the north coast of the island of New Britain across a low saddle NE of Bamus volcano, the South Son. The upper 1000 m of the 2334-m-high Ulawun volcano is unvegetated. A prominent E-W-trending escarpment on the south may be the result of large-scale slumping. Satellitic cones occupy the NW and eastern flanks. A steep-walled valley cuts the NW side of Ulawun volcano, and a flank lava-flow complex lies to the south of this valley. Historical eruptions date back to the beginning of the 18th century. Twentieth-century eruptions were mildly explosive until 1967, but after 1970 several larger eruptions produced lava flows and basaltic pyroclastic flows, greatly modifying the summit crater.

Activity in Ulawun

Activity in Ulawun

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Originally posted 2010-08-30 05:15:06.