10 comments on “Dome Inflation at Kikai Caldera, Japan

  1. PhysOrg article moves the date of the Deception Island caldera forming eruption from 9,800 years ago to 3,890 years ago. It is now classed as a VEI 6 ejecting 30 – 60 km3 of material, making it equivalent to Tambora and perhaps the largest volcanic eruption known in Antarctica. We covered this caldera in Antarctica 2 last year. Cheers –




  2. Thanks, agimarc! It’s amazing how journalists always assume (or love to imply) that after a huge eruption – esp. a relatively short time after – another one of similar power is likely to occur soon. If a caldera was formed by expelling 500 km³ of material 7300 years ago, I should say it takes a *very* long time to replenish that. I’d think it more likely that, if humongous eruptions were to come, they would happen in areas that never have made headlines before.

    On the other hand, an active caldera IS likely to produce further small to relatively large eruptions. So we’d better do our research and know in advance where they could happen.


  3. Out of sheer fun, I have made a juxtapose image to compare the size of the new Showa-Iojima using GE images from 2010 and 2015. I don’t know how the aquisition parameters of the sat camera, the tides or wave-hight influence the apparent size of an island but, looking very closely, it seems to me that it has enlarged (risen) somewhat in the E and N parts.
    I’ve made it a bit too big, so better view it in full screen mode.



    • Glad you and yours are okay!

      Tweet from the AK Earthquake Center, about the M 7.0: “This is 30 seconds of east-west earthquake shaking across Anchorage, from our strong motion network. The severity of shaking varied based on the location, and some areas experienced shaking exceeding 20%g.” Interesting, the variations are due to to ground-, rock structure, sedimentation etc.


    • Gosh! Lateral spreading, liquefaction in the swamp… between Knik Goose Bay Rd and the Parks Hwy. Image tweeted by Marc Lester (@marclesterphoto).


      • That’s across the Inlet from us. We had a bit of that on an onramp 4 – 5 N of us. The Daily Mail has the video of the vehicle that sunk on a block of fill.

        It’s been quite a night. When you are a long way away from a large quake, you don’t feel aftershocks. I think it being shallow contributes a lot also. Screen shot from UAF Seismology Lab of activity over the last 24 hours for your consideration. The main quake is the largest diameter circle at the 5:00 position of the swarm straddling the western shore of Knik Arm. Cheers –


  4. Pingback: Suwanose-jima, one of Japan’s Most Active Volcanoes |

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