By ExploreNow Editor, on February 22nd, 2012%
Volcano Type: Stratovolcano
Volcano Status: Historical
Last Known Eruption: 2010 (continuing)
Summit Elevation: 3470 m 11,384 feet
Latitude: 1.52°S 1°31’0″S
Longitude: 29.25°E 29°15’0″E
One of Africa’s most notable volcanoes, Nyiragongo contained a lava lake in its deep summit crater that was active for half a century before draining catastrophically through its outer flanks in 1977. In contrast to the low profile of its neighboring shield volcano, Nyamuragira, 3470-m-high Nyiragongo displays the steep slopes of a stratovolcano. Benches in the steep-walled, 1.2-km-wide summit crater mark levels of former lava lakes, which have been observed since the late-19th century. Two older stratovolcanoes, Baruta and Shaheru, are partially overlapped by Nyiragongo on the north and south. About 100 parasitic cones are located primarily along radial fissures south of Shaheru, east of the summit, and along a NE-SW zone extending as far as Lake Kivu. Many cones are buried by voluminous lava flows that extend long distances down the flanks of the volcano, which is characterized by the eruption of foiditic rocks. The extremely fluid 1977 lava flows caused many fatalities, as did lava flows that inundated portions of the major city of Goma in January 2002.
 Nyiragongo eruption Click Here For The Rest Of Nyiragongo, Congo
Originally posted 2010-08-29 04:44:04.
By ExploreNow Editor, on February 20th, 2012%
Volcano Type: Stratovolcano
Volcano Status: Holocene
Last Known Eruption: Unknown
Summit Elevation: 2411 m 7,910 feet
Latitude: 5.03°N 5°2’0″N
Longitude: 9.83°E 9°50’0″E
The well-preserved Manengouba stratovolcano rises to 2411 m across the Tombel Graben from Mount Cameroon and has two concentric summit calderas, Elengoum and Eboga. The older 6-km-wide Elengoum caldera is poorly defined and probably formed between about 800,000 and 600,000 years ago. Large lava flows traveled down the NE flanks from a breach on the eastern caldera rim. The younger 3-km-wide Eboga caldera is thought to have formed about 250,000 years ago. Younger volcanism of unknown age has constructed a SW-NE line of crater lakes and cinder cones across the caldera floor of the dominantly basaltic-to-trachytic volcano.
 Panoramic view of Mount Manengouba (Markus Betz)  Mount Manengouba (Markus Betz) Originally posted 2010-10-21 04:52:09.
By ExploreNow Editor, on February 17th, 2012%
Volcano Type: Fissure vents
Volcano Status: Historical
Last Known Eruption: 1978
Summit Elevation: 298 m 978 feet
Latitude: 11.58°N * 11°35’0″N
Longitude: 42.47°E 42°28’0″E
The Ardoukôba (Asal) Rift in Djibouti, trending NW from the Red Sea, contains a broad area of youthful fissure vents between Lake Asal and the Ghoubbat al Kharab gulf. The rift is subaerially exposed over a 12 km distance between these two bodies of water and contains numerous basaltic cinder and spatter cones. The silicic centers of Eger Alayta and Asa Aleyta, on the north and south sides of the rift, are remnants of a Pleistocene silicic center that has been disrupted and spread apart by the rift. Magma-water interaction has produced tuff cones, some of which form islands or are breached by the sea. The most recent lava flows are younger than lake sediments deposited 5300 years ago. These lavas were thought to have been erupted during the past 3000 years (Delibrias et al., 1975). The Ardoukôba fissure erupted in 1978, producing a small cinder cone and lava flows that covered part of the rift floor near the Red Sea.
Click Here For The Rest Of Ardoukôba, Djibouti, Africa
Originally posted 2010-08-25 03:51:19.
By ExploreNow Editor, on February 16th, 2012%
Volcano Type: Stratovolcano
Volcano Status: Holocene
Last Known Eruption: Unknown
Summit Elevation: 1875 m 6,152 feet
Latitude: 13.27°N 13°16’0″N
Longitude: 41.65°E 41°39’0″E
Mallahle volcano is located in northern Ethiopia near the border with Eritrea. Mallahle is the central of three NE-SW-trending stratovolcanoes in the Danakil horst SW of Dubbi volcano, and lies SSW of Nabro volcano. These two volcanoes, along with Bara Ale and Sork’Ale, form the Bidu volcanic complex. The complex Mallahle stratovolcano is truncated by a steep-walled 6-km-wide caldera. Mallahle is formed of rhyolitic lava flows and pyroclastics. Basaltic lava flows blanket the slopes of the volcano. Recent obsidian flows are found on the NW flank of Mallahle and older obsidian flows were erupted on the northern caldera floor. Flank spatter and scoria cones are most numerous on the western side of the volcano. Extensive ignimbrite deposits associated with the collapse of Mallahle and Nabro volcanoes blanket the countryside.
Originally posted 2010-10-22 04:10:38.
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