Within 24 hours of that swarm, an eruption had begun that sent a large plume over 13 kilometers (~42,000 feet) up.
Needless to say, this surprised almost everyone and the eruption was originally thought to be coming from Dubbi rather than Nabro.
Prior to this eruption, not much was known about Nabro, mostly thanks to its remote location in the deserts north Africa at the top of the East African Rift near the Red Sea.
The basaltic lava flows and rhyolite domes inside the Nabro caldera could be hundreds or hundreds of thousands of years old.
We know that the volcanoes in this part of Eritrea have been historically active.
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Check out the first on Cerro el Condor) The 2011 eruption of Nabro in Eritrea was one of the most unexpected large eruptions of the last decade.
The fact that part of the caldera wall is missing to the southwest (left) suggest these could be trap-door calderas where one side of the caldera subsides more than the other.
Alternatively, that wall could just be buried in debris from those caldera-forming eruptions.Dubbi erupted in the 1860s, producing some impressive lava flows and dusted ash as far as 300 kilometers (~186 miles) from the vent.Alid may not have erupted in historic times (that we know of), but it does have active fumaroles and other geothermal features., like, “a guy told me he was looking for a girlfriend by next year so he’d have someone to split rent with.” Then there was the charmer who told his date about the time he “got wasted, peed and mopped it up with his clothes, and then wore them.” Um, yeah.But, if you’re the kind of guy who reads , we’d like to assume you know better than to make mistakes like these.This explains its history of large explosive eruptions caused by rhyolite volcanism, like what formed the large calderas, and the lava flows caused by basaltic volcanism like we saw in 2011-12.