Ol Doinyo Lengai, Tanzania

The Toulouse VAAC reported that a plume from Ol Doinyo Lengai was observed by pilots on 21 February and rose to an altitude of 18.3 km (60,000 ft) a.s.l. Based on a Significant Meteorological Information (SIGMET) report, an ash plume rose to an altitude of 14 km (46,000 ft) a.s.l. on 24 February.

Source: Toulouse Volcanic Ash Advisory Center (VAAC) - “Report provided courtesy of the Smithsonian’s Global Volcanism Program and the US Geological Survey’s Volcano Hazards Program.”