By Volcano Explorer, on January 27th, 2012
 weh volcano Volcano Type: Stratovolcano
Volcano Status: Pleistocene-Fumarolic
Last Known Eruption: Pleistocene time
Summit Elevation: 617 m 2,024 feet
Latitude: 5.82°N 5°49’0″N
Longitude: 95.28°E 95°17’0″E
The island lies about 15 kilometres (9 mi) off the northernmost tip of Sumatra. The island is small at only 156.3 square kilometres (60.3 sq mi), but mountainous. The highest peak is a fumarolic volcano, 617 metres (2,024 ft) high. The last known eruption is estimated to have occurred in the Pleistocene age, as a result which the mountain partially collapsed and was filled by the sea, forming a separate island. Click Here For The Rest Of Weh Island Volcano
Originally posted 2011-04-20 00:47:46.
By ExploreNow Editor, on January 27th, 2012
Volcano Type: Cinder cones
Volcano Status: Holocene
Last Known Eruption: Unknown
Summit Elevation: 214 m 702 feet
Latitude: 13.32°S * 13°19’0″S
Longitude: 48.48°E 48°29’0″E
Nosy-Be island off the NW coast of Madagascar contains very recent basaltic lava flows from well-preserved cinder cones. Many large crater lakes are found in the central part of the island. Nosy-Be volcanics, which are dominantly of low-silica foiditic compositions, overlie Mesozoic limestones and other sedimentary rocks. Two periods of activity occurred at Nosy-Be. Initial eruptions of fluid lava flows from the western side of the massif were followed by the construction of numerous strombolian cinder cones on the western plain. Little is known about the age of the volcanic field, and the only K-Ar dates are Tertiary in age, but the Nosy-Be volcanics were mapped as recent.
 Nosy-Be, Madagascar (Bettina Neuefeind)  Nosy-Be, Madagascar (Bettina Neuefeind)  Sunset in Nosy-Be (Bettina Neuefeind)  Area in Nosy-Be (Bettina Neuefeind)  Shore (Bettina Neuefeind)  Puddle of mud (Bettina Neuefeind) Originally posted 2010-10-19 04:26:11.
By ExploreNow Editor, on January 26th, 2012
Volcano Type: Stratovolcano
Volcano Status: Historical
Last Known Eruption: 2010 (continuing)
Summit Elevation: 5230 m 17,159 feet
Latitude: 2.002°S 2°0’9″S
Longitude: 78.341°W 78°20’27″W
The isolated Sangay volcano, located east of the Andean crest, is the southernmost of Ecuador’s volcanoes, and its most active. The dominantly andesitic volcano has been in frequent eruption for the past several centuries. The steep-sided, 5230-m-high glacier-covered volcano grew within horseshoe-shaped calderas of two previous edifices, which were destroyed by collapse to the east, producing large debris avalanches that reached the Amazonian lowlands. The modern edifice dates back to at least 14,000 years ago. Sangay towers above the tropical jungle on the east side; on the other sides flat plains of ash from the volcano have been sculpted by heavy rains into steep-walled canyons up to 600 m deep. The earliest report of a historical eruption was in 1628. More or less continuous eruptions were reported from 1728 until 1916, and again from 1934 to the present. The more or less constant eruptive activity has caused frequent changes to the morphology of the summit crater complex.
Click Here For The Rest Of Sangay, Ecuador
Originally posted 2010-08-23 04:16:23.
By ExploreNow Editor, on January 26th, 2012
Volcano Type: Stratovolcano
Volcano Status: Historical
Last Known Eruption: 2010 (continuing)
Summit Elevation: 3772 m 12,375 feet
Latitude: 14.756°N 14°45’21″N
Longitude: 91.552°W 91°33’6″W
Symmetrical, forest-covered Santa María volcano is one of the most prominent of a chain of large stratovolcanoes that rises dramatically above the Pacific coastal plain of Guatemala. The 3772-m-high stratovolcano has a sharp-topped, conical profile that is cut on the SW flank by a large, 1.5-km-wide crater. The oval-shaped crater extends from just below the summit of Volcán Santa María to the lower flank and was formed during a catastrophic eruption in 1902. The renowned plinian eruption of 1902 that devastated much of SW Guatemala followed a long repose period after construction of the large basaltic-andesite stratovolcano. The massive dacitic Santiaguito lava-dome complex has been growing at the base of the 1902 crater since 1922. Compound dome growth at Santiaguito has occurred episodically from four westward-younging vents, the most recent of which is Caliente. Dome growth has been accompanied by almost continuous minor explosions, with periodic lava extrusion, larger explosions, pyroclastic flows, and lahars.
Click Here For The Rest Of Santa Maria, Guatemala
Originally posted 2010-08-30 04:44:47.
|
|
|
