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The 2011 Nabro eruption was an eruption of the Nabro stratovolcano in the Southern Red Sea Region of Eritrea, which began on 12 June 2011 after a series of earthquakes. [2] The eruption killed seven [3] and possibly a further 31 people [4] and is estimated to be the highest altitude injection of sulfur dioxide (SO 2) ever observed by satellite.
Lava flows at Nabro Volcano, June 29, 2011 Although it had undergone no historically reported eruptions, [ 5 ] the Nabro Volcano erupted shortly after midnight local time on 13 June 2011, after a series of earthquakes up to magnitude 5.7 in the Eritrea-Ethiopia border region. [ 5 ]
Peralkaline felsic lava flows reached 7 kilometres (4.3 miles) long and 3 to 8 metres (9.8 to 26.2 feet) thick. [17] The eruptive products of the bimodal stratovolcano stage were deposited over a timespan of 1.8 million years and cover an area roughly 20 kilometres (12 miles) long and 20 kilometres (12 miles) wide.
Mount Rainier is a stratovolcano in the Cascade Volcanic Arc that consists of lava flows, debris flows, and pyroclastic ejecta and flows. Its early volcanic deposits are estimated at more than 840,000 years old and are part of the Lily Formation (about 2.9 million to 840,000 years ago).
The main summit of the volcano is a lava dome called Pico Laco, which is variously reported to be 5,325 metres (17,470 ft) or 5,472 metres (17,953 ft) high. The edifice has been affected by glaciation, and some reports indicate that it is still fumarolically active. The volcano is known for its magnetite-containing lava flows of enigmatic origin.
Mafic magma is less viscous; it produces lava flows and is less prone to explosive eruptions than silicic magma. [18] The Mount Bachelor volcanic chain, southeast of South Sister, consists of Mount Bachelor, [19] which is the largest [5] and northernmost volcano of the group, [19] and a series of cinder cones, lava flows, and three shield ...
The word lava comes from Italian and is probably derived from the Latin word labes, which means a fall or slide. [2] [3] An early use of the word in connection with extrusion of magma from below the surface is found in a short account of the 1737 eruption of Vesuvius, written by Francesco Serao, who described "a flow of fiery lava" as an analogy to the flow of water and mud down the flanks of ...
The northern summit cinder/scoria cone and some lateral lava flows have been assigned to the Santa Rosa series. [39] Lava flows from these stages have gray colours and rocky appearance which sometimes appears like it is covered by plates, with flow folds and some breccia. Their thicknesses and widths range 20–90 metres (66–295 ft ...