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.

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Fisher Caldera, Alaska – The largest Caldera System in the State

Historically Active Volcanoes of Alaska. Image courtesy AVO. https://avo.alaska.edu/images/dbimages/display/1258656665_ak6.jpg

Recent Volcanic Activity in Baja California

Schematic of major volcanic fields and structures in Baja California. Image courtesy All.This.Homework blog. https://allthishomework.wordpress.com/general-education/physical-geography/earthquakes-and-volcanoes/

Bogoslof Update – August 2018

AVO survey team returning to ship following a day of investigation of Bogoslof August 2018. Newly formed dome is at left, with still active fumaroles. 1926 – 1927 dome in in the center. 1992 dome is to the right. Photo courtesy Gabrielle Tepp, AVO. https://avo.alaska.edu/images/image.php?id=127351

Kunlun Volcanic Group, China

Yutian volcano in Kunlun Volcanic Group. Image courtesy China Whisperer. http://www.chinawhisper.com/top-6-chinas-amazing-volcanoes/

If it Wasn’t for Science, we Might Never have Known – MAYOTTE (🇾🇹) EQs

Aerial view of Mayotte: Petite Terre, with Grande-Terre in the background. Aug. 2018. (© Gil40100, via tripadvisor.com)

On the morning of November 11, just before 9:30 UTC, many seismographs around the world began scribbling a strange signal that looked only remotely like a normal earthquake. Someone spotted it, and it didn’t take long until, in the social media, tinhattery boiled over the rim and attention-seekers had a heyday.

Australia 1 – Introduction into Australian Volcanic Activity

Mount Elephant, Newer volcanic field, Victoria. Abandoned scoria quarry in the foreground. Photo courtesy Australian Geographic. https://www.australiangeographic.com.au/topics/science-environment/2017/05/volcanic-victoria/

Splitting North America – The Walker Lane – Part 2 – The Volcanic Fields

 

Schematic of Long Valley Caldera and surrounding volcanic structures. Relative locations of all three California calderas along the Walker Lane are depicted in previous images. Image courtesy Indiana.edu. http://www.indiana.edu/~sierra/papers/2010/jarosinski.html

Splitting North America – The Walker Lane – Part 1 – The Tectonics

Location of Walker Lane. San Andreas Fault System is depicted in red running from the lower right to the upper left of the image. Image courtesy Carlson et all. https://pubs.geoscienceworld.org/gsa/geosphere/article/9/6/1530/132671/kinematics-of-the-west-central-walker-lane

Real Risk or Fearmongering? PALINURO & MARSILI SEAMOUNTS (🇮🇹)

Bathymetry of the southern Tyrrhenian Sea. The inset shows a schematic representation of the tectonics affecting southern Italy. (from: M. Ligi et al., 2014)

On and off during recent years I caught some headlines about submarine volcanoes in Italy but never got round to read those studies. Since I came across some really Doom-&-Gloom-The-End-Is-Nigh videos I decided to have a closer look at these. And I’ll give the answer beforehand: Yes there is a real risk. And, yes, there is an awful amount of fearmongering.