Has anyone heard about what has happened since?
Scientists are warning that the Tungurahua volcano in Ecuador is showing early signs of impending catastrophic collapse, after satellite data showed substantial internal damage from ongoing magma activity.
Tungurahua, has been persistently active since 1999 so wear and tear was inevitable, especially given that the ‘Throat of fire,’ or ‘Black giant’ as the Quechua indigenous people named it, has already collapsed twice before thousands of years ago.
“Using satellite data we have observed very rapid deformation of Tungurahua’s west flank, which our research suggests is caused by imbalances between magma being supplied and magma being erupted,” says geophysical volcanologist James Hickey from the University of Exeter in the UK, whose worrying research was recently published.
Tungurahua previously collapsed at the end of the Late Pleistocene, after which it then rebuilt itself for thousands of years, before collapsing again about 3,000 years ago.
Such collapses can trigger massive landslides and pyroclastic flows, which can travel for tens of kilometers. For example, the collapse 3,000 years ago is thought to have laid waste to an area of roughly 31 sq miles (80 sq km).
Meanwhile, an eruption in 1999 forced the evacuation of some 25,000 people, so the impact on human life in the area should the volcano collapse again would be truly staggering.
Thanks to Dr Klaus Kaiser for this link
More about Tungurahua
“Tungurahua is one of the most active volcanoes in Ecuador, and is located about 140 km south of the capital city of Quito,” says volcanologist John Search.
“Tungurahua is a steep-sided stratovolcano that towers 3 km (1.86 miles) above its northern base. Tungurahua volcano has a complex historical record which includes sudden, violent eruptions. The volcano has a diameter of 14 km (8.7 miles).
“Historic volcanic activity has occurred at the summit vent, and has consisted of strombolian to vulcanian explosions, sometimes accompanied by pyroclastic flows, lava flows and lahars.
“During the past 1300 years eruptive episodes were generally once per century, and commenced with lapilli emission and pyroclastic flows, followed by lava flows or lava plug in the crater. This cycle was observed in the largest historic eruptions in 1773, 1886 and 1916-1918.”
Here are the known (or extrapolated) dates of previous Tungurahua Volcano Eruptions
1999-2013, 1944?, 1916-25, 1900?, 1886-88, 1885?, 1857, 1781?, 1777?, 1776, 1773, 1757?, 1646?, 1644?, 1641, 1640?, 1557, 1350 ± 50 years, 1250 ± 50, 1030 ± 75, 800 AD?, 730 AD ± 200, 600 AD?, 480 AD ± 75, 350 AD?, 200 AD?, 100 AD?, 50 BC?, 100 BC?, 270 BC ± 100, 500 BC?, 1010 BC ± 100, 7750 BC?
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April 20, 2021 at 09:52PM