This is a volcano with NO known history of eruption before June of this year.
OGA, the Djibouti Seismological Agency reports renewed seismic activity below the Nabro volcano. Seismic activity does not mean necessarily that the volcano will erupt again. In fact, and 3 of the 4 quakes are too deep to be related to an upcoming eruption.
However, according to earthquake-report .com, a magnitude 4.3 earthquake did strike below the volcano on the 10th of September.
Click here for the satellite map
2011-09-11 18:53:39 3.1 Eritrea – depth 600 meter
2011-09-10 20:05:48 4.3 Eritrea – depth 5.3 km
2011-09-10 06:29:35 2.7 Eritrea – depth 10.72 km
2011-09-09 04:27:38 3.5 Eritrea – depth 8 km
Map of East Africa showing some of the historically active volcanoes(red triangles) and the Afar Triangle (shaded, center) — a so-called triple junction (or triple point), where three plates are pulling away from one another: the Arabian Plate, and the two parts of the African Plate (the Nubian and the Somalian) splitting along the East African Rift Zone
According to NASA, “Nabro, a stratovolcano in the northeast African nation of Eritrea, rumbled to life late in the evening on June 12, 2011, following a series of earthquakes.
“Initial reports from news agencies and the Volcanic Ash Advisory Center in Toulouse, France, proclaimed the eruption to be occurring at Dubbi, a volcano further south. But later reports from volcanologists, field scientists, and the satellite image above appear to confirm the eruption at Nabro.
“There are no historical reports of eruptions at Nabro before that day.
“The volcano is part of a larger complex with several nested calderas nearby. It is part of the East African Rift, where the African continent is slowly pulling apart due to tectonic plate movements.”
See: “Eritrea Nabro volcano eruption : seismic activity continues below Nabro”
See also: “Nabro eruption : 31 people killed at the Ethiopian side – thousands more need aid”
Thanks to Caroline Snyder for these links