Report on Erta Ale (Ethiopia) — 13 October-19 October 2021
Smithsonian Institution / US Geological Survey
Weekly Volcanic Activity Report, 13 October-19 October 2021
Managing Editor: Sally Sennert.
Please cite this report as:
Global Volcanism Program, 2021. Report on Erta Ale (Ethiopia) (Sennert, S, ed.). Weekly Volcanic Activity Report, 13 October-19 October 2021. Smithsonian Institution and US Geological Survey.
13.601°N, 40.666°E; summit elev. 585 m
All times are local (unless otherwise noted)
During 15 September-15 October satellite data showed thermal anomalies of variable intensities in Erta Ale’s S pit crater and occasional thermal anomalies at the N pit. An anomaly was detected in the N, NW, and W parts of the N pit crater on 15 October.
Geological Summary. The Erta Ale basaltic shield volcano in Ethiopia has a 50-km-wide edifice that rises more than 600 m from below sea level in the Danakil depression. The volcano includes a 0.7 x 1.6 km summit crater hosting steep-sided pit craters. Another larger 1.8 x 3.1 km wide depression elongated parallel to the trend of the Erta Ale range is located SE of the summit and is bounded by curvilinear fault scarps on the SE side. Basaltic lava flows from these fissures have poured into the caldera and locally overflowed its rim. The summit caldera usually also holds at least one long-term lava lake that has been active since at least 1967, and possibly since 1906. Recent fissure eruptions have occurred on the N flank.
Source: Sentinel Hub