Mauna Loa, Earth’s largest active volcano, is still stirring

Mauna Loa
February 2016HAWAII Despite not being in the headlines, Mauna Loa continues to be in a state of unrest based on seismic and deformation monitoring data. The USGS Hawaiian Volcano Observatory’s improved seismic network began to detect increasingly frequent, small earthquakes on Mauna Loa as early as 2013. Renewed inflation of the volcano was detected by HVO’s GPS network and also with Interferometric Synthetic Aperture Radar (InSAR) in 2014. Based on the elevated rates of earthquakes and persistent inflation, the Volcano Alert Level for Mauna Loa was elevated from Normal to Advisory on September 15, 2015. According to the USGS Alert-Notification System for Volcanic Activity, an Advisory level indicates that the volcano is showing signs of unrest above known background levels, but does not mean that an eruption certain. Another period of Mauna Loa unrest in 2004–2005 included inflation and anomalous seismicity, but did not result in an eruption.
Mauna Loa, the largest active volcano in the world, has erupted 33 times since 1843. These eruptions occurred within the volcano’s summit caldera (Mokuʻāweoweo), along one of its two rift zones (Northeast and Southwest), or from radial vents located on the north and west flanks of the volcano. All historical eruptions started at the summit of Mauna Loa and then either remained in the summit area or migrated down one of the rift zones. Of the 33 eruptions, about half remained within the summit area and about half moved down a rift zone. Mauna Loa’s two most recent eruptions occurred in 1975 (summit) and 1984 (summit and Northeast Rift Zone). Both eruptions were preceded by at least a year of elevated seismicity. Satellite technology was not as advanced then, so there are no GPS or InSAR records for either of these eruptions.
The current locus of inflation and earthquakes is within the uppermost parts of Mauna Loa’s Southwest Rift Zone and the southern summit area. However, should an eruption occur, it is not clear if it would remain in the summit or move into one of the volcano’s rift zones. The risk to communities downhill of a Mauna Loa eruption depends on where the eruption occurs and if, and how far, erupting fissures migrate down a rift zone. As is often the case during volcanic unrest around the world, the current activity at Mauna Loa has not followed a steady, predictable trend. Overall, earthquake rates remain above normal background levels. But, a closer look at the seismic record reveals that earthquakes have occurred at higher rates for weeks to months, separated by quieter periods of a week or so. This crude episodic pattern may point to an unsteady influx of magma into the inflating area southwest of the summit caldera, with more magma intruding during times of higher earthquake rates.
An interesting change in the current unrest began in the fall of 2015, when, according to InSAR and GPS measurements, the main source of inflation on Mauna Loa moved from beneath the summit caldera to an area slightly farther southwest on the volcano. Along with this change in deformation, earthquakes beneath the summit caldera ceased. Currently, most of the earthquakes occurring on Mauna Loa are within the volcano’s uppermost Southwest Rift Zone region. –Big Island Now
This entry was posted in Dormant fault activation, Earth Changes, Earth Watch, Earth's core dynamics, Earthquake Omens?, Harmonic tremor swarm, High-risk potential hazard zone, Landslide & geological deformation, New volcanic activity, Potential Earthchange hotspot, Prophecies referenced, Seismic tremors, Signs of Magnetic Field weakening, Time - Event Acceleration, Volcano unrest, Volcano Watch. Bookmark the permalink.

14 Responses to Mauna Loa, Earth’s largest active volcano, is still stirring

  1. Dennis E. says:

    Welcome back Alvin.
    It seems that volcanic action has significantly pickup since the first of the year.
    Expect cooler temps in the future I think.

    By the way, you have to check out strangesounds.org. Clouds that have actual appearances of three horses.
    Auroras in the design of animals/birds. Either a hologram or somebody is trying to contact us. Site also records/ montiors trumpet type sky noises. Very interesting.

    Like

    • Thanks. Yes, there has been a noticeable rise in volcanic activity. Each year seems to herald a new intensification in these geological processes.

      That’s interesting. I’ll look into it.

      Liked by 1 person

      • Dennis E. says:

        yes, very interesting. With recent reports/photos? of what appears to be cities in the sky leads me to believe a great deception is unfolding, Clouds that look like cities, ufo’s or from science fiction sagas

        Like

      • Katnea says:

        Hey Alvin, the reason I’m writing you today, (04/03/16) is because we haven’t heard much of anything from you since February 2016. And while I understand that you are in demand for your wisdom, the people here are also depending upon your wisdom as well. The thing is Alvin, your fans, (myself included) do indeed worry about you when you are MIA. And while I truly hope all is well with you and yours, I also feel that a brief heads-up, as to when you need to be away for a while, is also a very appropriate action that you could provide to your fans as well…eh? Afteral, how else are your ‘Worry Wart’ fans to remain calm as to your wellbeing? I mean what if one of Nancy Lieder’s zealots got a hold of you?! (That’s my Lieder joke btw)

        Seriously though, I for one am patiently awaiting for your return to keep us abreast of the new developments that not only threaten our species, but that of any living species who we also share this planet with. So that, and yes, I not only miss your feedback, but I also miss the feedback of your other fans who frequent this website that you’ve created for us to do just that… to share our thoughts by reaching out to each other.

        Respectfully yours,
        KB

        PS: I hope you haven’t turned into a Trumpkin and are busily campaigning for, The Donald? (Grin)

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      • Thanks Katnea for your thoughtful words. I adore you for simply writing that.

        And while I understand that you are in demand for your wisdom, the people here are also depending upon your wisdom as well.”

        I am so fortunate and deeply appreciative that I have so many wonderful people around me like yourself to enrich this experience called “life.” I am preparing a lot of things for all of you in this finality and I’m doing it during the day, “for the night cometh when no man can work.” JOhn 9:4

        MIA = WFF (Working fast and furious) – Check your email

        Much love and thanks again for writing,
        Alvin

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      • Yellow Bird says:

        “MIA = WFF”, oh i really like that! this is what i will tell myself during ‘dry spells’ from now on :}

        Like

  2. Volcanic activity has picked up in Nicaragua since December…Masaya, Momotombo, Cerro Negro, and Telica.

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  3. Margaret says:

    Going to Hawaii in July, would love to see an eruption! (but not too severe of one!)

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  4. tonic says:

    Yeah right,……………………… I’ll check back in six months,
    That is what you want, isn’t it?

    Like

  5. Tina Tenis says:

    Alvin.
    As a regular reader for several years now of this site, I’ve noticed there haven’t been any new postings in 2 months. I hope you are doing okay and look forward to seeing new ones in the future.
    Sincerely, Tina

    Like

  6. christopher says:

    Hey Alvin I read an article on volcano cafe. A fictional story, but showing the devastating damage if Iwo Jima erupted.

    Like

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