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Nabro volcano

Updated: Mar 2, 2024 19:53 GMT -
stratovolcano 2218 m / 7,277 ft
Eritrea, 13.37°N / 41.7°E
Current status: normal or dormant (1 out of 5)
Last update: 14 Dec 2021 (thermal anomaly at summit suggesting weak activity continuing in the summit caldera)

Nabro is a stratovolcano at the SE end of the Danakil Alps in Eritrea and is the highest volcano in the Danakil depression.
Nabro is a complex volcano with 2 nested calderas of 8 and 15 km diameter, the larger of which is breached to the SW. The stratovolcano consists mainly of trachytic lava flows and tephra layers. Inside the caldera and on its flanks, there are post-caldera rhyolitic obsidian domes and basaltic lava flow. Although not precisely dated, the most recent features are lava flows from NNW-trending fissures transverse to the NE-SW trend of the Nabro volcanic range.

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Typical eruption style: effusive
Nabro volcano eruptions: 2011

Latest nearby earthquakes

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Background

Nabro stratovolcano sits on the crystalline basement of the Danakil horst, an isolated segment of the original continental African crust which has been largely dissected and is being pulled apart in the Afar triangle by active oceanic spreading ridges.
Nabro is the most prominent and NE-most of a NE-SW chain of 3 large volcanoes (Nabro, Dubbi, Mallahle), each containing a large summit caldera. These 3 volcanoes, along with Sork Ale volcano, collectively form the Bidu volcanic complex.

2011 earthquake swarm & eruption on 12 June
During the late afternoon and evening of June 12 2011 a series of moderate earthquake struck at first near Afambo in Eritrea and later 100 km more to the south in Ethiopia. The swarm was followed by a new explosive eruption at Nabro volcano. The eruption produced a large ash plume that drifted westwards over northern Africa and quickly reached more than 1000 km length.
This is the first known historic eruption of Nabro volcano.
Originally, its neighbor and historically active Dubbi volcano was believed to be the source of the eruption. ...more

See also: Sentinel hub | Landsat 8 | NASA FIRMS
Mon, 30 Jan 2012, 00:01

Nabro volcano (Eritrea) activity update: thermal anomaly at summit suggesting weak activity continuing in the summit caldera

A new weak thermal anomaly located inside Nabro's summit caldera was detected on 29 Jan on satellite infrared images by MODVOLC. It suggests that some sort of activity still goes on there. ... Read all
Wed, 28 Sep 2011, 06:00

Nabro volcano (Eritrea) - Smithsonian / USGS Weekly Volcanic Activity Report for 28 September-4 October 2011 (New Activity / Unrest)

According to NASA's Earth Observatory, satellite images of Nabro acquired on 28 September showed heat from the vent in the central crater, and from an area 1.3 km S of the vent that indicated an active lava flow. A small and diffuse plume rose from the vent. A region of seemingly thicker black ash (that completely covered the sparse vegetation) was noted S of the crater and thinner layers of ash (with some areas of visible vegetation) flanked either side of the region. ... Read all
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