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The final eruptions in the creation of Banks Peninsula in New Zealand occurred about 9 million years ago. A major eruption of Gran Canaria took place around 14 million years ago. Approximately 23.03 million years BP, the Neogene period and Miocene epoch begin. Cerro Guacha, Bolivia; 5.6–5.8 Ma (Guacha ignimbrite). [61]
Ash eruptions, some to altitudes over 7.5 miles (12 km), were associated with several of the lava eruptions. By 1960, the dome had grown nearly 853 feet (260 m) high and a sequence of viscous flows, up to 984 feet (300 m) thick and covering an area of about 1,200 acres (5 km 2 ) south of the volcano, had been extruded.
Name Elevation Location Last eruption meters feet Coordinates; Malumalu: Last 8,000 years Ta‘u-931: 3054: 30,000 years ago [15]: Ofu-Olosega: 639: 2096: 1866 unnamed submarine cone eruption
Possible eruptions occurred around 1730 and 1750 and sometime during 1780 and 1803. [48] A June 1832 eruption was witnessed by a missionary on Maui, but the 190 km (118 mi) between the two islands and lack of apparent geological evidence have cast this testimony in doubt. Thus the first entirely confirmed historically witnessed eruption was a ...
These eruptions have taken place from the main caldera and fissures along rift zones. They are generally fluid ( VEI -0) Hawaiian eruptions but more violent eruptions have occurred throughout Mauna Loa's eruptive history, with the largest recorded explosive eruptions having taken place in the 19th century.
1950 Chicago streetcar crash: a collision and explosion kills 34. [4] June 1 – Mauna Loa in Hawaii starts erupting. June 5 – Sweatt v. Painter decided in the Supreme Court of the United States, challenging the "separate but equal" doctrine of racial segregation in education.
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Since 1950, there have been several earthquake swarms each year at Mount Hood, most notably in July 1980 and June 2002. [31] [32] Seismic activity is monitored by the USGS Cascades Volcano Observatory in Vancouver, Washington, which issues weekly updates (and daily updates if significant eruptive activity is occurring at a Cascades volcano). [33]