Here we are at the knockout stage and where the competition starts to hot up. Vote for whichever country in each game you want to see progress to the quarter finals.
Russia vs Portugal
For this match up I pick the Kamchatka volcano Gorely to represent Russia to go up against a Portuguese volcano. This caldera contains some overlapping small stratovolcanoes and numerous craters at the summit or flanks, some containing a crater lake whether it’s freshwater or acidic. Eruptions are usually of vulcanian or phreatic style. Last eruption came in 2010.
For Portugal I choose Agua de Pau on the island of Sao Miguel in the Azores to go up against Gorely. This stratovolcano contains an outer caldera and an inner caldera, the latter which contains a lake called Lagoa do Fogo. A VEI 5 eruption from the caldera occurred in 1563 which was followed by a lava flow originating from the northwest flank. Numerous cinder cones are present on the flanks plus some hot springs on the northwest flank.
Peru vs Argentina
I choose El Misti to represent Peru for this match up. This majestic symmetrical stratovolcano rises above the city of Arequipa at the altitude of 5822m asl, and the summit crater displays fumarolic activity. Pyroclastic eruptions have occurred in the past especially at around 2000 years ago when a pyroclastic flow travelled 12km to the south. Some reports of historical eruptions may have been mistaken for increased fumarolic activty.
Representing Argentina will be the Peinado Volcano, a symmetrical stratovolcano in northwest Argentina. No historical eruptions have been known but well preserved lava flows which appeared to have originated from the summit and flank vents are well preserved.
Costa Rica vs Germany
For this match up I choose Poas to represent Costa Rica against Germany. Poas is the most visited active volcano in Costa Rica and has for long contained an acidic crater lake in the active crater until the last major eruption in 2017. Eruptions on Poas are predominately of phreatic style especially as they break through the surface of the lake and many historical eruptions have occurred since 1747. The extinct Botos crater contains a freshwater lake. In 2017, strong phreatic explosions blew apart the small lava dome at the south end of the crater lake, eventually leading to the lake to dry up.
Laacher See will go up against Poas of Costa Rica for this one. This volcanic caldera lake is part of the East Eifel Volcanic Field but is no longer active and was formed about 12,900 years ago as a result of a VEI 6 plinian eruption.
England vs Colombia
I choose Tristan Da Cunha to go up against a Colombian volcano. This South Atlantic island consists of a central shield volcano (Queen Mary’s Peak) with numerous parasitic cones and vents dotted around the flanks. During the only historical eruption of 1961-62 a vent opened up near the north shore of the island causing the evacuation of the island’s only settlement, Edinburgh of the Seven Seas.
Cumbal Volcano near the border with Ecuador will go up against England’s volcano representative. This glacier capped volcano contains two summit craters both of which have active fumaroles. Two historical eruptions occurred in 1877 and 1926.
Spain vs Saudi Arabia
I thought I’d be fair on Saudi Arabia and give them an equal opponent and choose Montañas del Fuego on the island of Lanzarote to represent Spain, a cinder cone field which saw historical activity in 1730-36 and 1824. The eruptions of 1730-36 originated from fissures and produced voluminous lava flows covering 200 square km and also reached the western coast of the island.
The Harrat Rahat volcanic field will represent Saudi Arabia. This is the site of Saudi Arabia’s largest lava field which covers 20,000 square km and extends 300 km south of the Islamic holy city of Madinah. Evidence for volcanic activity can be seen for miles around in the form of basaltic lava flows, scoria cones, cinder cones, and even Pelean-type lava domes. The most recent eruption occurred in the year 1256 when a lava flow threatened the city of Madinah.
Iceland vs France
Iceland has no shortage of volcanoes to choose from but just to be fair on France I’ll choose Hengill. A volcanic system which contains fissure vents, crater rows, and small shield volcanoes, as well as the Hengill central volcano itself. No historical eruptions have occurred but hot springs occupy the flanks of Hengill as well as the Nesjavellir Geothermal Power Plant located down valley between the central volcano and the Thingvallavatn lake.
For France I’ll choose the island of St. Paul in the Indian Ocean to go up against Hengill of Iceland. The caldera of St. Paul is breached to the northeast and is filled in by the sea as a result of the collapse of the northeastern half of the island. The only historical eruption of St. Paul took place in 1793 from the lower southwest flank. Geothermal areas are present near the caldera rim.
Mexico vs Brazil
For Mexico I choose Barcena which is located on San Benedicto Island off coast of Mexico in the Pacific Ocean. Barcena was formed during the only historical eruption in 1952-53 when a tuff cone formed at the southern end of San Benedicto Island. Two small lava domes then formed in the crater and a lava flow occurred from a fissure at the southeast base of the cone.
The island of Trindade in the Atlantic Ocean will represent Brazil. Very much dissected, phonolitic lava domes and volcanic plugs are present on the island along with remnants of a cinder cone. No historical eruptions are known on this island.
Japan vs Panama
For Japan, I’ll choose their famous volcano to be their representative in the match up against Panama, Mount Fuji. This stratovolcano is the most well known in Japan and is very picturesque within the surrounding landscapes especially when there’s snow. The last historically known eruption of Fuji came in 1707-08 but was quite strong. Explosive eruptions along with small pyroclastic flows have occurred in the past as well as some basaltic lava flows. Flank vents are also present especially the Hoei Crater, site of the 1707-08 eruption.
Up for representing Panama is the Baru Volcano located in the west of the country. Lava domes occupy the summit caldera which is breached to the west, and a possible strong eruption may have been observed in the mid 16th century.
Polls will close on the 2nd July.