Natural Hazards Assessment By Christopher Iannuzzi

1710 WordsMay 18, 20167 Pages
Natural Hazards Assessment by Christopher Iannuzzi Introduction Nabro volcano Nabro is located in Eritrea, North Eastern Africa, next to the boarder of Ethiopia. The Nabro volcano is a stratovolcano and has a height of 2218m (7277 feet), and is the highest point in the Nabro Volcanic Range. The Nabro volcano erupted on the 13th of June 2011 and the volcano had become dormant on the 3rd of June 2012, this was the first ever historically recorded eruption of Nabro volcano. Its eruption was a 4 on the VEI (Volcanic Eruption Index). Eyjafjallajökull volcano Eyjafjallajökull is located in Sudurland, Iceland and is apart of the East Volcanic Zone of Iceland. The Eyjafjallajökull volcano is a stratovolcano and has a height of 1666m (5466…show more content…
In the case of the Nabro volcano, it was formed by the Arabian Plate and African Plate diverging; whereas the Eyjafjallajökull volcano was formed by the Eurasian Plate and North American Plate diverging (Mid Atlantic Ridge). The causes of the eruption for the Nabro volcano was the multiple series of earthquake with Magnitudes between 4.3 – 5.7 which struck the Nabro Volcanic Range the day before. The cause of the Eyjafjallajökull eruption was the magma being forced up through existing strata which then made a magma intrusion which led to a vent leading the magma to a 2.5km caldera at the summit of the volcano, but this was not the first place of the eruption because a dike was formed before and it had erupted in an arear near the caldera where there was no icecap. The main difference in the two volcanoes is that one of them was located beneath an icecap while the other one was under old basaltic lava flow that had already hardened. Both eruptions had an explosive start which sent a column of plume into the atmosphere. The Nabro explosions might of been caused by high levels of water which had dissolved in the magma or could of been because of mush under the volcano. Whilst the Eyjafjallajökull explosions were caused by the mixture of ice and magma. The Nabor volcano’s plume went in two different directions, South West and North West. The South west plume was rich in Sulfur Dioxide, whilst the North West plume travelled 1000km and covered some parts of
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