So we’ve now reached the quarter final stage of the Volcano World Cup and this is where the competition starts to tighten up when serious volcanic nations come up against each other. Do the usual, vote for whoever you want to progress to the semi finals.
Russia vs Peru
I thought I’d make use of the Kurile Islands and pick Chirinkotan to go up for Russia. This small island consists of an above the water summit of a stratovolcano which has a small caldera breached to the southwest. Historical eruptions date back to the 1800s but the most recent eruptive period occurred during 2016-17. Lava flows were witnessed in the 1880s.
For Peru I choose Huaynaputina to go up against Chirinkotan of Russia. Huaynaputina has only had one historical eruption but was a mighty VEI 6 eruption which occurred in 1600 resulting in the construction of three overlapping ash cones within the depression breached to the east and pyroclastic flows which travelled 13 km east and southeast. Lahars reached the Pacific.
Costa Rica vs Colombia
I choose Irazu to represent Costa Rica going up against Colombia. Irazu is a large 3432m high stratovolcano which is located east of the capital San Jose. Frequent eruptions have occurred since the 1700s but the most recent eruption came in 1994 when a phreatic eruption occurred on the upper northwest flank. A significant eruption during 1963-65 caused a lot of ashfall which disrupted the surrounding areas.
Purace will represent Colombia to go up against Costa Rica. This volcano has had numerous eruptions dating from 1816 going right up to 1977 with the largest eruptions occurring in 1849, 1869, and 1885.
Spain vs Iceland
I will pick El Hierro in the Canary Islands to go up against Iceland. This island contains numerous cones and a massive collapse scarp which is present to the northwest of the island caused by the gravitational collapse of the El Golfo shield volcano. A recent eruption occurred during 2011-12 from a submarine vent to the south of the island.
For Iceland I choose Surtsey to go up against El Hierro. This small volcanic island emerged from the sea in 1963 producing phreatomagmatic explosions before eventually building up high enough to prevent the sea from washing away the loose materials, enabling the eruption to become lava fountains producing lava flows which formed a hard shell on the new island preventing erosion. The eruption ended in 1967. Surtsey is part of the Vestmannaeyjar submarine volcanic system.
Mexico vs Japan
I choose El Chichon to represent Mexico for this one. The only historical eruption was in 1982 when a huge VEI 5 eruption occurred blowing apart the lava dome that once made up the summit area of the volcano, forming a 1 km wide crater. Pyroclastic flows occurred devastating the area within a 8 km radius plus destroying the village of Francisco Leon in the process. An acidic lake now occupies the crater floor.
For Japan I choose Unzen, that volcano which claimed the lives of Maurice and Katia Krafft during a pyroclastic flow. It is a complex volcano located in southern Japan which had much of it’s historical activity on Fugen-dake but also on the Mayu-yama lava dome complex. The most recent eruptive period came in 1990-95 (and later 1996) when a lava dome grew in the crater and caused large pyroclastic flows which caused fatalities and damage to populated areas.
Polls will close on the 8th July.