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Hawaii 'lava dome' revealed in throwback image

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Author Topic: Hawaii 'lava dome' revealed in throwback image  (Read 295 times)
20,000 Leagues Under the Sea
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« on: April 08, 2018, 12:21:17 pm »


This Volcano Erupted For 5 Years Straight, And The Photos Are Mesmerising

You're looking at a very rare type of lava fountain.
SIGNE DEAN
5 APR 2018

On 24 May 1969, a deep rumbling started within Kīlauea, the largest of the volcanoes comprising the island of Hawai'i.

Those were the first moments of the historical Mauna Ulu eruption - a spectacular outpour of lava that lasted for a total of 1,774 days, at the time becoming the longest Kīlauea eruption in at least two millennia.

Staff at the Hawaiian Volcano Observatory had noted that the magma reservoir underneath the tip of the volcano had started to swell, but they still didn't expect the magnificent activity that lasted well into the summer of 1974.

So huge was this eruption that the cooling lava created a whole new landscape on the side of Kīlauea, earning the name of "growing mountain", or Mauna Ulu.

In 1969 alone, twelve huge lava fountains erupted at the site, and much of this activity has been captured for posterity in glorious photographs.

The United States Geological Survey (USGS) recently reminded the world of the Mauna Ulu eruption with a throwback photo to one of the rarest types of a lava fountain you can possibly get:

    Dome fountain of episode 10, October 10–13, 1969, eruption of Kilauea Volcano. This dome fountain is about 20 m (65 ft) high. Symmetrical dome fountains such as this are rare. #Tbt #HI @Volcanoes_NPS pic.twitter.com/sKSQaVINKs
    — USGS (@USGS) March 29, 2018

Usually, lava just explodes all over the place without any rhyme or reason, making this beautiful, perfectly rounded dome fountain all the more special. (By the way, the foreground is not the ocean, as it might seem at first glance - it's a landscape of cooled lava.)

Here's another version of the photo, taken on 11 October 1969. The original tweet notes its height at roughly 20 metres (65 feet), but according to USGS records, at some point the fountain may have towered as high as 75 metres (246 feet):
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