Volcanoes of Samoa – Part 1 of 2

Google Maps screen capture of the Samoan Islands. The two main islands of the nation of Samoa are clearly visible left of center, Savai’i and Upolu. The main islands of American Samoa also visible, the American Samoa label is hiding Tuluila. To its east are Ofu – Olosega, Ta’u and the Vailulu’u seamount. Sea floors are up to 5,000 under the island chain. Multiple seamounts, some related, some not, are visible. The curved structure in the lower right is the transition of the Kermadec – Tonga Trench into the Vitaz Trench, a source of significant tectonic stress in the region.

Gunung Guntur, the Thunder Volcano, Garut Regency, Indonesia

Gunung Guntur from the south looking north. Most recent lava flow clearly visible. Note the lava flow coulees on the flank to the right of center. Image courtesy Wikimedia Commons

Indian Heaven Volcanic Field, Washington State, USA

Lemei Rock in Indian Heaven volcanic field.  Image courtesy Outdoor Project, Fall Color in Indian Heaven Wilderness, WA, Lisa Holmes, 2014

Lanin and the Huanquihue Volcanic Group, Argentina

Blocky, partly forested Escorial lava flow.  Looking S across Lago Epulafguen toward its source, Achen – Niellu pyroclastic cone.  A’a lava flow is 200 – 400 years old.  Image courtesy Hecto Osvaldo Gonzalez, 2007 via Smithsonian GVP

Ongoing Effusive Eruption at La Soufriere, St Vincent

An effusive eruption began on La Soufriere volcano on St Vincent (St Vincent and the Grenadines) island in the eastern Caribbean Sea in Dec.  Note that this is currently an ongoing dome building eruption.

Volcanoes of the Solomon Islands – Part 1 of 2

Map of Solomon Islands and most of its volcanoes. Two active volcanoes are in yellow, Kavachi, center left, and Tinakula, lower right. Recently active volcanoes are in bright green. Dormant / extinct volcanoes are black. Bougainville Island in the upper left is part of Papua New Guinea, but also volcanic. New Georgia Island group center left is home to most of the volcanoes to be discussed in this post. Image screen capture from interactive map in Volcano Discovery

Manda-Inakir, Rifting Volcanism in the Afar

Manda – Inakir recent volcanism. The Kammourta volcano is flagged at the red pointer. It is the 1928 – 1929 most recent eruption from this system. Multiple lava flows at center to the south of the main line of lava flows is the Dabbahu Manda Hararo rifting event of 2005 – 2010. The Andabba plain is to the lower right of the image. Google Maps screen capture.

Makushin Volcano, Alaska. The 9th Most Dangerous Volcano in the US?

Active fumaroles on Makushin Volcano from Dutch Harbor July 2018. Photo courtesy Abi Woodbridge, via AVO

Shishaldin Volcano, Alaska – Neighbor to Fisher Caldera

Shishaldin from 11 km altitude. Note the steam from the ice-free crater. Image courtesy AVO, Jun 2015.

Australia 4 – The Volcanoes of Victoria and Tasmania

Schematic of volcanic provinces in Victoria. Older volcanics are depicted in green, Newer in orange, and Macedon – Trentham in blue. Image courtesy Meeuws, et al. https://www.sciencedirect.com/science/article/pii/S0264817216300605

 

This post will cover remaining volcanic activity in southern Australia.  The majority of it is in the southeastern state of Victoria.  The most recent activity has spilled over the border to the west into South Australia.  Finally, we will take a look at volcanic activity in the Bass Strait, the water separating Tasmania from the rest of the continent and a quick look at volcanic activity in Tasmania.