M6.7 rocks Japan island — Followed by Intensity 4 quake in Fukushima

Published: April 21st, 2013 at 11:33 am ET


Title: M6.7 earthquake rocks Torishima
Source: AFP-JIJI
Date: Apr 22, 2013

A 6.7-magnitude earthquake struck the southern fringes of the Izu Island chain off Honshu on Sunday […]

[…] a depth of about 450 km. […]

Later in the day, a 4.2-magnitude earthquake struck Fukushima Prefecture at 7:27 p.m., the agency said.

The quake registered 4 on the Japanese seismic intensity scale of 7 in the city of Aizuwakamatsu and the village of Konan in Koriyama, Fukushima Prefecture.

See also: [intlink id=”intense-jolt-northeast-japan-series-quakes-hit-tokyo-country-18-quakes-m40-several-hours” type=”post”]{{empty}}[/intlink]

Published: April 21st, 2013 at 11:33 am ET


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20 comments to M6.7 rocks Japan island — Followed by Intensity 4 quake in Fukushima

  • lam335 lam335

    It's only a matter of time before a big enough quake strikes close enough to Fuku to deal the hanging fuel pool(s) a fatal blow. I wish they would hurry up and get that fuel removed and secured.

    • norbu norbu

      lam335, I share the same thought, Haste makes waste, Nice and steady please, with a little hurry up….

    • NoPrevarication NoPrevarication


      The event took place on 3/11/11 at Fukushima. When did they put the last spent fuel in that decrepit pool? Remember that is the problem with spent nuclear fuel, once deposited in the pool, it cannot be moved out for five years–it is too hot. Just think of all that we have around the U.S. which can't be removed promptly even if we had a permanent place to put it; even if there was an urgent reason to move it….

  • Jay

    It is the 450+ Km depth the eq occurred , the Transition region , that tells what is coming :


    If that layer moves then what is on top , the crust , will follow soon .

  • Quakes hit southern Honshu, Fukushima
    NATIONAL APR. 21, 2013 – 08:00PM JST ( 12 )

    The 4.2 quake was very shallow (10km):

    "Meanwhile, a 4.2-magnitude quake struck at 7:27 p.m. in Fukushima Prefecture in the northeast at a shallow depth of 10 kilometers and was felt throughout the region, the Japan Meteorological Agency said.

    It had no impact on the tsunami-ravaged Fukushima Daiichi plant, its operator Tokyo Electric Power Company said."

    The problems sometimes show up a few hours after they make the announcement, so, the quicker they announce that nothing is wrong, the less they appear like liars.

  • Dr. Anne Lee Tomlinson Maziar anne

    37.460°N, 139.966°E
    Depth: 43.7km (27.2mi)
    Event Time
    1. 2013-04-21 10:27:36 UTC
    2. 2013-04-21 19:27:36 UTC+09:00 at epicenter
    3. 2013-04-21 04:27:36 UTC-06:00 system time
    37.460°N 139.966°E depth=43.7km (27.2mi)
    Nearby Cities
    17km (11mi) SW of Inawashiro, Japan
    22km (14mi) SSE of Kitakata, Japan
    37km (23mi) W of Koriyama, Japan
    38km (24mi) W of Motomiya, Japan
    198km (123mi) N of Tokyo, Japan

    This earthquake is 58.6 mi (94.28 km) W on land from Fukushima Daiichi (#1) Nuclear Power Plant
    Fukushima #1 37.422972N 141.032917E

  • TheBigPicture TheBigPicture

    Quakes are an issue because nuclear industries worldwide are unable to clean up meltdowns.

    Sad, but true.

  • Sickputer

    Anybody who thinks manmade objects are impervious to the forces of nature eventually finds out there is nothing humans can build that is indestructible.

    Some amazing footage of soil liquefaction in the 311 quake:


  • 16Penny 16Penny

    Correct me if I am wrong, but isn't part of the problem that the SFP is a couple of stories above ground?

  • PhilipUpNorth PhilipUpNorth

    We know corium is no longer in Containment 2, since the water is relatively cool, and the tons of water added to the Containment every day has disappeared, likely entering ground water through the large hole in the bottom of the Containment. The same can be said for Containments1&3, although no endoscope videos have been made. Here is a video made inside the Containment of Unit 2.
    Earthquakes will disturb Corium1,2,&3, cracking the crust, and exposing new surfaces to leach into the surrounding water.
    Earthquakes also threaten spent fuel pools, breaking apart damaged or corroded fuel assemblies, spilling their contents, and breaking up the concrete holding the SFPs up 100' in the air. Fukushima Diiachi is now a total loss. 100% of the fuel in Reactors1,2,&3 has been lost to the environment. Only half, or less than half, of the spent fuel assemblies can be removed intact from SFP1,2,3,&4. Somebody do the math. A terrible fate awaits human kind. Lucky that the Pacific Ocean is nearby to serve as a nuclear dumping ground. So sad. 🙁

    • 16Penny 16Penny

      Thanks PhilipUpNorth,

      "Earthquakes also threaten spent fuel pools, breaking apart damaged or corroded fuel assemblies, spilling their contents, and breaking up the concrete holding the SFPs up 100' in the air. "

      so since the common sfp is the greatest risk due to it's large quantity of fuel rods, shouldn't we be getting these down and moved to higher grounds?

      Wouldn't getting them down be dangerous? Ya sure would but it looks like it is pretty dangerous to leave them up in the air so to speak. What would be a safe way to get them down? Construct a confining structure, like a reverse coffer dam, and fill it with sand. Attach guide cables to reinforced structure of the SFP, adding support structure if necessary. Using access tunnels, enter below and separate lower connection of existing reinforced concrete supports. Same for the connection at the top, cut em and pull them out from under the sfp. Use cranes to extract vertical support members. Horizontal members could be extracted from the bottom or allowed to go into a pit at the bottom of the "sand pit". Once old structure is out of the way, remove sand from pit. Using guide cables as a backup I think the pools could be lowered intact down to ground level where they could be moved to a better location for ongoing maintenance cooling, surrounded by thousands of Japanese ninja kitty guards with lasers of course.


      • 16Penny 16Penny

        But to the serious aspect of the idea, It's been around for a while.

        "Actually raising an obelisk to the Egyptians was a simple matter. The first thing that they would do is figure where they wanted it placed. They would dig two pits, side by side, connected by a wooden door that could be raised by a rope. One of the pits was the exact location of where they wanted the obelisk This pit was filled with sand. Next they would drag the obelisk to the pit on a sledge or rollers then drag it over the pit full of sand and have the heaviest part, the bottom, on the sand. Here comes the ingenious part, they would pull up on the trap door and the sand would be pushed out of the pit by the weight of the obelisk and go into the empty pit and as this was happening the obelisk would begin to stand up on its own. After it stood up they would shovel dirt around it, it was now standing. That is how ancient Egyptians raised an obelisk"

        Read more here: http://aboutfacts.net/Ancient141.html

        I am proposing the reverse of the way the Egyptians did it but it should still be able to be done when FUKUdiocracied back to neanderthal mentalities. Nothing but sticks, stones, cables and strong backs required.

        • PhilipUpNorth PhilipUpNorth

          This is the type of fuel cask transport used at Fukushima:
          Good observations, 16 Penny.
          Fuku has been moving spent fuel around the facility for decades, and has the equipment to do so pretty well worked out.
          What they do is the following:
          1. A transport cask is lifted from a truck bed by crane into the spent fuel pool.
          2. Spent fuel assemblies are lifted from racks, and placed inside the cask.
          3. The cask lid is fitted to the cask.
          4. The cask is lifted from the pool, and placed on a truck bed.
          5. The cask is transported to the common spent fuel pool (which is at ground level).
          6. The cask is lifted into the pool for unloading.

          TEPCO also has the ability to load fuel assemblies into dry casks for storage. Now, they have ordered a couple of hundred dry casks, and will construct new dry cask storage facilities. Typically, spent fuel spends years in the spent fuel pool. It is then relocated to the common SFP for further cooling. Finally, it is put into "temporary" dry casks for storage.

          A new crane support structure is being built over Unit4 SFP. Fuel removal will begin in 2013, to be completed in 2014. Similar crane support structures will be needed to empty SFP1,2,&3. Spent fuel assemblies have been damaged by falling debris, fire, overheating, seawater, and explosions. Perhaps less than half of them will maintain their structural integrity during fuel removal.

          • PhilipUpNorth PhilipUpNorth

            My prediction is that the fuel removal process will leave the floor of the SFP littered with piles of fuel pellets, spilled from damaged fuel assemblies. Suppose a spill occurs from the bottom of a fuel assembly, as it is moved by crane, producing a pile of spent fuel pellets 30' in diameter, and 48" high at its center. The spill involves 36,400 fuel pellets, spilled onto a stainless steel pool bottom, from 1 pellet deep at the edges, to perhaps 500 pellets deep at the center. The water chemistry is as you would expect following the Fukushima disaster. What will happen?
            The water will moderate neutrons, and the fuel pellets would heat up beyond their melting point, forming a pool of molten fuel pellets on the bottom of the SFP. Zirconium cladding would melt and burn at these temperatures, producing lots of hydrogen. Will a SFP boil dry? Will hydrogen explosions occur? Can spilled fuel pellets be cleaned up before they melt down? Time will tell.

            • 16Penny 16Penny

              Thanks for not beating me about for not knowing the CSFP is on the ground, I haven't studied FUKUtecture yet. If the fuel unloading scenario you described above is possible then even gently lowering the pools may cause a similar calamity.

              At any rate, every day this mess sits in the air the odds of further catastrophe increase. Every earthquake could be the one and whether or not they report any damage, damage is occurring with each seismic wave.

              Anyone working in the Nuclear field that still uses "That will never happen" in defense of their design is only fooling themselves, and I doubt even that. Go find an honest job and let someone else do their bidding. Make cakes, drive a bus or better yet, be a janitor at a cancer treatment facility. That is one way you can help clean up after yourselves if you care to.