Volcanism along the Northern EPR 9.8° – 17° N

Location of RISE Project area at the Northern East Pacific Rise. Image courtesy Wiki

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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.

Mount Longonot, Kenya

Mount Longonot most recent caldera (pit crater) with line of pyroclastic craters down flank fissure on the north.  Massive lava flow on the flank visible on the lower left of the photo.  Image courtesy Lonely Planet

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.

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

Antarctica 2 – The Deception Island Caldera

Deception Island. Neptunes Bellows, harbor entrance. Rest of caldera to the right. http://travelvista.net/deception-island

1999 – 2001 Eruption Sequence in the Gakkel Ridge

Gakkel Ridge across the Arctic Ocean basin https://www.researchgate.net/figure/284359093_fig1_Fig-1-The-study-area-is-the-Gakkel-ridge-Dotted-line-divides-the-Gakkel-Ridge-into

Another Hot Spot: Mt. KARTHALA, Comoros

The pit crater Changouméni (created 1918?) in the northern lobe of the Karthala caldera is filled to the brim with new lava. 17/01/2007. (© OVK)

Azores part 2 – tectonics

Azores Plateau from Weiss, et all