BackgroundTat Ali volcano is the dominant feature of the Tat Ali Range, east of Lake Afrera. The low Holocene shield volcano has an elongated summit depression and has produced a variety of rock types, ranging from basalts to pantellerites. NNW-SSE-trending fissures cutting the volcano have fed basaltic lava flows; those NE of Lake Afrera are of prehistorical age. Late-stage volcanism produced youthful basaltic lava flows on the floor of the summit depression, which is also the site of prominent fumarolic activity.
Smithsonian / GVP volcano information
Tat Ali Photos
The Cosmic Ray Research Station at the end of the road up to the summit plateau of Mount Aragats, at 3200 m altitude. The site was constructed in 1943 as a branch of the ...
Steam rises up along some of the cracks in the lava lake's surface, precipitating white mineralisations of mostly calcium sulfates and silica (Photo: Ingrid Smet)
Extension day 3: Older lava flows that came down the pali left a kipuka (vegetation island) behind. More recent surface lava outbreaks are recognisable by their dark brow...
July 27. Will the dam hold and contain the lava flow to the other side? Spectators, mostly journalists watch the lava flow invading La Sapienza. (Photo: Tom Pfeiffer)
See also: Sentinel hub | Landsat 8 | NASA FIRMS