150,000-100,000 years ago and a number of lava flows were emplaced during the last 100,000 years. Holocene and present activity Eruptions occurred 8,970 ± 640, 8,200, less than 6,000 years ago and 0 ± 3,000 years ago; the first emplaced pumice on the summit, the penultimate of these formed a lava dome on the northern flank while the last formed a lava flow on Mount Hasan's western foot. A shift in archeological sites around Mount Hasan may be linked to the older eruptions. Hydrothermal activity also occurs at Mount Hasan, with fumaroles and water vapour emissions observed on the summit. Magnetotelluric imaging has found evidence of a magma chamber at depth and of a possible hydrothermal system. A seismic swarm occurred southwest of Mount Hasan in 2020 next to a cinder cone that was active 2000 years ago, and reportedly there are frequent explosions within the volcano. Possible portrayal of an eruption in a mural from Çatalhöyük A mural discovered in Çatalhöyük has been interpreted as showing a volcanic eruption, commonly linked to Mount Hasan, and this mural has even been interpreted as being the oldest known map. The interpretation of the mural showing a volcanic eruption has been contested however as an alternative interpretation is that the "volcano" shown in the mural is actually a leopard and the "village" a set of random geometric motifs. The map interpretation is also contested. If the mural indeed shows an eruption, it probably occurred only a short time before the mural was drawn. Radiocarbon dating has yielded ages of about 7,400 - 6,600 years BCE for Çatalhöyük and radiometric dating has produced evidence for explosive eruptions during the time that Çatalhöyük was inhabited. The recorded eruption probably was a lava dome eruption and a possible although disputed reconstruction of a mural recording the eruption is in Museum of Anatolian Civilizations in Ankara. The discovery of this mural has drawn attention to the volcano and has led to efforts to date the eruptive activity of Mount Hasan. Importance during ancient history Mount Hasan was used as a source for Obsidian. The Byzantine city of Mokissos was located on Mount Hasan. The mountain is considered to be the second beacon of the Byzantine beacon system, which was used to relay information from the Taurus Mountains to the Byzantine capital Constantinople. Gallery See also List of volcanoes in Turkey List of Ultras of West Asia