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Thread: Kīlauea Activity

  1. #121
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    Human impact: Stunning before and after satellite views of the eruption area covering homes in the Multimedia Section, posted Sept 28.
    Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.

  2. #122
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    USGS has downgraded Kilauea's alert status from orange to yellow for both aviation and otherwise due to now significant activity for thirty days. They also note this:
    This change in activity marks the first time since 1986 that lava has not been active at Kīlauea's surface for a period of 30 or more days (The last long pause was 48.5 days between episodes 39 and 40 of the Puʻu ʻŌʻō eruption.) In the past 200 years, the volcano has experienced periods of quiet ranging from months to years with no eruptive activity. However, Kīlauea is one of the most active volcanoes in the world, and additional eruptions will occur.
    Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.

  3. #123
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    From the HVO site: "Kīlauea Volcano is not erupting." They haven't been able to say that in more than 30 years. But there's an inflationary trend.
    Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.

  4. #124
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    Quote Originally Posted by Trebuchet View Post
    From the HVO site: "Kīlauea Volcano is not erupting." They haven't been able to say that in more than 30 years. But there's an inflationary trend.
    To paraphrase Arnold, "She'll be back."

  5. #125
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    So will this be considered the end of the 1983 eruption?

  6. #126
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    Quote Originally Posted by publiusr View Post
    So will this be considered the end of the 1983 eruption?
    Probably not, unless the period of inactivity goes on for a year or two. I'd bet it won't. It's recharging.
    Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.

  7. #127
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    Quote Originally Posted by publiusr View Post
    So will this be considered the end of the 1983 eruption?
    Quote Originally Posted by Trebuchet View Post
    Probably not, unless the period of inactivity goes on for a year or two. I'd bet it won't. It's recharging.
    On the other hand....
    September 4 was the last time active lava was observed along the LERZ; tomorrow (December 5) will mark three months with no eruptive activity at the surface. According to the Smithsonian Institution's Global Volcanism Program (https://volcano.si.edu/), volcanoes with no eruptive activity over a three-month period are no longer classified as having a "continuing" eruption. Based on this Global Volcanism Program criterion, the LERZ eruption could be considered to be over. However, there is one known example (Mauna Ulu, 1969-74) in which Kilauea's rift zone activity resumed after more than three months had passed. Although this phase of Kīlauea's activity has now reached this three-month threshold, it is important to note that it is still an active volcano that could erupt in the near future and associated hazards have not changed. Magma is being supplied to Kīlauea and geophysical datasets continue to show evidence for movement of material through the magma system, including the refilling of the ERZ.
    (Link is to the update page which gets updated. I don't see how to get one for a specific daily report.)
    Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.

  8. #128
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    New report on magnitude of the activity there...

    https://phys.org/news/2018-12-kilaue...ecedented.html

    Data from Kilauea suggests the eruption was unprecedented
    December 14, 2018 by Bob Yirka, Phys.org

    A very large team of researchers from multiple institutions in the U.S. has concluded that the Kilauea volcanic eruption that occurred over this past summer represented an unprecedented volcanic event. In their paper published in the journal Science, the researchers describe the sequence of events that transpired and what set them apart from other volcanic eruptions. Kilauea, a volcano on Hawaii's big island underwent a long, drawn-out eruption over this past summer. It made headlines due to the spread of lava that destroyed many homes and changed some of the island's landscape. And it is now making news again as data from the eruption reveals that it erupted in ways that have not been seen before.


    original paper:
    http://science.sciencemag.org/conten...cience.aav7046

    The 2018 rift eruption and summit collapse of Kīlauea Volcano
    C. A. Neal, et al.; Science 11 Dec 2018: DOI: 10.1126/science.aav7046

    In 2018, Kīlauea Volcano experienced its largest lower East Rift Zone (LERZ) eruption and caldera collapse in at least 200 years. After collapse of the Pu‘u ‘Ō‘ō vent on 30 April, magma propagated downrift. Eruptive fissures opened in the LERZ on 3 May, eventually extending ~6.8 km. A 4 May earthquake (M6.9) produced ~5 m of fault slip. Lava erupted at rates exceeding 100 m3/s, eventually covering 35.5 km2. The summit magma system partially drained, producing minor explosions and near-daily collapses releasing energy equivalent to M4.7-M5.4 earthquakes. Activity declined rapidly on 4 August. Summit collapse and lava flow volume estimates are roughly equivalent—about 0.8 km3. Careful historical observation and monitoring of Kīlauea enabled successful forecasting of hazardous events.
    There is something fascinating about science. One gets such wholesale returns of conjecture out of such a trifling investment of fact.
    Mark Twain, Life on the Mississippi (1883)

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