The Nabro Volcano is an active stratovolcano in the Southern Red Sea Region of Eritrea.

The twin calderas likely formed during an eruption of about 20 to 100 cubic kilometres consisting of ignimbrite, although the date of their formation is unknown.

[5] The ash plume was seen on satellite drifting to the west-northwest along the border, spanning about 50 km wide and several hundred kilometres across in the hours immediately following the reported eruption, and reportedly reaching 15 km (9.3 mi) high.

[5] On June 13, US Secretary of State Hillary Clinton had to cut short a trip to Ethiopia due to the ash cloud, which was projected to enter a west-to-east jetstream and enter the atmosphere of countries such as Egypt, Yemen, Israel, Iraq, Jordan, Sudan, Somalia, Djibouti and Saudi Arabia.

The exact nature of the activity is unknown, but activolcans.info[usurped] noted that there might be a lava lake there.