Pyroclastic flow
All posts tagged Pyroclastic flow
Towada volcano, northern Honshu. Clearly visible is the main caldera, the newer Nakanoumi caldera which truncated the Goshikiiwa stratovolcano in the caldera, and the most recent Ogurayama dome. Image generally looking west. Image courtesy Yoshihiro Ishizuka via Smithsonian GVP
Annotated topographic map of Akan caldera, caldera lake, and post-caldera volcanoes. Lake Kussharo is off the image at the upper right. Image courtesy Plate Tectonic Narod.ru.
Update, Aug. 2019:
In the five years since this was first posted, science continues to grind away, answering a few questions which in turn create a bunch more questions. The Baillie tree ring / ice core team is increasingly of the opinion that the 535 – 540 AD global cooldown was caused by huge volcanic eruptions, at least two of them bracketing the period. A team including Robert A Dull published a paper August 16 entitled “Radiocarbon and geologic evidence reveal ilopango volcano as the source of the colossal ‘mystery’ eruption of 539/40 CE” that appears to nicely define the most recent end of that bracket.
Mount Unzen from the west. Looking over Fugen-dake dome toward the east. http://рчц-дфо.рф/unzen-japan.php
El Misti
Photo: http://vulcanologia.igp.gob.pe/volc%C3%A1n-misti
agimarc
Spica
Granyia
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