Posts about volcanoes mainly in and around the Pacific Ocean, except Americas.
NASA ISS photo of Raikoke in eruption taken June 22. Active plume with water vapor collar at the base. Water vapor collar at the base may be due to ambient air sucked upwards with the plume. Alternately, it may be due to interaction of pyroclastic flows with surrounding sea water. Image courtesy NASA Earth Observatory.
Simushir Island. Volcanoes named on the image. Photo courtesy Japan Space ASTER, Oct. 2004.
Suwanose-jima island and Otake volcano in its center. Flank collapse and new pyroclastic cone are clearly visible on the center and to the east of the crater. Image screen capture via Google maps.
ISS astronaut photo of Sarychev Peak eruptive plume June 12, 2009. 3 pyroclastic flows are visible at the base of the plume. Brown flow to the left toward the shoreline. Grey – white flow toward the bottom of the photo. Finally, a third dark brown flow to the right toward the opposite shoreline. Image originally courtesy NASA. https://en.wikipedia.org/wiki/Sarychev_Peak
The Southwest side of Avachinsky Volcano 09/2014 (© kuhnmi via Wikimedia)
Although I have known that the Avachinsky is one of the more active volcanoes in Kamchatka, somehow I habitually tended to skip it when checking webcams and reports for new activity in Kamchatka – I saw forever this owl face, this snow-covered, never-changing mountain… That has changed since I came across this wonderful diary by a 19th century German-Baltic geologist and explorer, K. v. Ditmar. He had lived and worked 1851-55 in Petropavlovsk, at the foot of two magnificent volcanoes. Although he didn’t manage to get to the crater – bad weather, strong gas emissions and superstitious company made him abandon two attempts – he loved volcanoes! Continue Reading
Anak Krakatau a week following flank collapse eruption Dec. 22. The vent region has not yet been rebuilt above water level. Highest remaining part of the island is the hyaloclastic ring that used to host the most recent cone. Note also the island has been resurfaced and grown a bit. Image courtesy BBC News, Jan. 3 https://www.bbc.com/news/science-environment-46743362https://www.bbc.com/news/science-environment-46743362
Yutian volcano in Kunlun Volcanic Group. Image courtesy China Whisperer. http://www.chinawhisper.com/top-6-chinas-amazing-volcanoes/
Satsuma Iojima Island on the rim of the Kikai Caldera. Iojima rhyolite dome is at the upper right. Inamura scoria cone is midway between the peninsula at the lower right and Iojima. Photo courtesy Getty via The Sun. https://www.thesun.co.uk/tech/5572129/underwater-supervolcano-eruption-kill-100-million-people-japan-lava-dome-science/
Smith volcano, Babuyan Claro Island (© Garrison et al., 2018)
“The 1831 eruption of Babuyan Claro in the Philippines is regarded as one of the most significant volcanic climate forcing events of the nineteenth century, particularly so when treated as a double eruption with the 1835 (VEI 5) eruption of Cosegüina, producing ‘enhanced’ forcing effects over a decadal time frame.”
Follows the course of much detective work and its conclusion:
“We therefore suggest that the 1831 eruption of Babuyan Claro is a false event and that one or more alternative eruptions will have to be identified as the source of the 1831 stratospheric sulphate aerosol.” Continue Reading
View to the W in a helicopter overflight of Maly Semyachik, with an old eroded cone of another volcano of this caldera in the background. (Img. via Twitter by “@ГК РФ(🇷🇺)в Женеве” Oct. 16, 2017)
Kamchatka is one of the most remote parts of the world with difficult access to most of its volcanoes. And yet, there are detailed maps available, and many of the volcanoes are researched well. Have you ever wondered how on earth volcanologists figure out the volume of a crater lake or the size of Continue Reading
Spica
Granyia