Nabro Volcano Erupts Again Thursday
17 June, 2011 | By Mark Dunphy (Irish Weather)
----------------------------------------------------------------------------------
Volcanic activity has increased at the Nabro volcano in Eritrea,
just four days after the stratovolcano sent an ash plume more
than 15km into the air.
The ash drifted westnorthwest over Sudan Thursday evening
threatening to bring further disruption to air traffic in the east Africa
region.
Sunday night’s eruption led to some flight cancellations in neighbouring
Sudan, Djibouti and Ethiopia, and saw a massive ash plume being
carried as far away as Saudi Arabia, Israel, Turkmenistan, the Central
African Republic and Egypt.
The below MODIS Terra 1km True Colour satellite image, captured
Thursday afternoon, shows the ash plume drifting hundreds of
kilometres west of Nabro.
The most recent ash advisory from the Toulouse, France, based
Volcanic Ash Advisory Centre indicates that a relatively small region
is affected by emissions from Nabro. The next update is expected to
feature a much more expansive ash advisory, affecting neighbouring
Sudan.
The latest eruption follows two relatively small earthquakes in the
region on Thursday. Two magnitude earthquakes were registered in
the vicinity of the stratvolcao at 3.47am and 8.30am (both GMT).
The below map from EMSC identifies the epicentre of the most
recent shallow earth tremor.
Part of the Afar Triangle, Nabro is one of many volcanic caldera
complexes in the north easternmost part of the East African Rift valley
region. The stratovolcano is located in the Danakil Depression, close
to Eritrea’s border with Ethiopia and north of Djibouti, and has not
erupted in at least 150 years. It is the most prominent of 3 large
volcanoes (Nabro, Dubbi, Mallahle) in the region, each containing a
large summit caldera. Nabro comprises lava domes, lava flows, and
two calderas, 8 and 5 km in diameter.
The volcano is located along the Great Rift Valley, also known as the
East African Rift. the divergent plate boundary extends from the Afar
Triple Junction southward across eastern Africa, and is in the process
of splitting the African Plate into two new separate plates, the Nubian
Plate and the Somali Plate. Seismic activity is frequent in Ethiopia In
1961 alone three thousand tremors were recorded from the centre of
the Wollo province resulting in a 20km fissure being opened on the
slopes of the Borkena graben.
Courtesy
17 June, 2011 | By Mark Dunphy (Irish Weather)
----------------------------------------------------------------------------------
Volcanic activity has increased at the Nabro volcano in Eritrea,
just four days after the stratovolcano sent an ash plume more
than 15km into the air.
The ash drifted westnorthwest over Sudan Thursday evening
threatening to bring further disruption to air traffic in the east Africa
region.
Sunday night’s eruption led to some flight cancellations in neighbouring
Sudan, Djibouti and Ethiopia, and saw a massive ash plume being
carried as far away as Saudi Arabia, Israel, Turkmenistan, the Central
African Republic and Egypt.
The below MODIS Terra 1km True Colour satellite image, captured
Thursday afternoon, shows the ash plume drifting hundreds of
kilometres west of Nabro.
The most recent ash advisory from the Toulouse, France, based
Volcanic Ash Advisory Centre indicates that a relatively small region
is affected by emissions from Nabro. The next update is expected to
feature a much more expansive ash advisory, affecting neighbouring
Sudan.
The latest eruption follows two relatively small earthquakes in the
region on Thursday. Two magnitude earthquakes were registered in
the vicinity of the stratvolcao at 3.47am and 8.30am (both GMT).
The below map from EMSC identifies the epicentre of the most
recent shallow earth tremor.
Part of the Afar Triangle, Nabro is one of many volcanic caldera
complexes in the north easternmost part of the East African Rift valley
region. The stratovolcano is located in the Danakil Depression, close
to Eritrea’s border with Ethiopia and north of Djibouti, and has not
erupted in at least 150 years. It is the most prominent of 3 large
volcanoes (Nabro, Dubbi, Mallahle) in the region, each containing a
large summit caldera. Nabro comprises lava domes, lava flows, and
two calderas, 8 and 5 km in diameter.
The volcano is located along the Great Rift Valley, also known as the
East African Rift. the divergent plate boundary extends from the Afar
Triple Junction southward across eastern Africa, and is in the process
of splitting the African Plate into two new separate plates, the Nubian
Plate and the Somali Plate. Seismic activity is frequent in Ethiopia In
1961 alone three thousand tremors were recorded from the centre of
the Wollo province resulting in a 20km fissure being opened on the
slopes of the Borkena graben.
Courtesy
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