“It’s Complicated”: Japan aftershock upgraded to M7.4 — Gov’t now says it was 2 quakes at same time

Published: December 11th, 2012 at 11:42 am ET


Watch Fukushima webcams shaking during M7.4 quake

Source: Asahi Shimbun Digital
Summary Translation: Fukushima Diary
Date: Dec. 11, 2012

[…] Earthquake Research Committee of the government announced it was two continuous earthquakes which are separated. According to the analysis of meteorological agency and Earthquake Research Institute of the University of Tokyo, the first earthquake was reverse fault type from the inside of the pacific plate, and 10~20 seconds later, the second one occurred, which was normal fault type. Japan meteorological agency comments it was really a complicated mechanism.

Published: December 11th, 2012 at 11:42 am ET


Related Posts

  1. Japan experts warn of more quakes off Fukushima coast — Gov’t: There’s fear ‘relatively large’ ones will occur — Recent M6.8 a “delayed tectonic reaction” to M9.0 on 3/11 — “This is just one aftershock of several to come… could occur in next 2 weeks” (VIDEO) July 15, 2014
  2. 4 quakes M4.0 and higher hit Japan in last 4 hours — Chiba, Miyagi, Iwate February 27, 2012
  3. Intense jolt hits Northeast Japan — Series of quakes near Tokyo — Country has 18 quakes M4.0 and over today April 17, 2013
  4. Dozen M4 quakes and above hit Eastern Japan since Thursday — Four at intensity 4 of 7 on JMA scale November 24, 2012
  5. Powerful M6.2 quake hits eastern Japan — Felt over span of 500 kilometers — 13 quakes near same spot in two hours (MAP) February 25, 2013

15 comments to “It’s Complicated”: Japan aftershock upgraded to M7.4 — Gov’t now says it was 2 quakes at same time

  • krugthecaveman krugthecaveman

    Would someone please explain that in a way that is more understandable?

    • gottagetoffthegrid

      what they are saying is that 2 EQs happened in rapid succession at nearly the same location.

      the first one was a thrust-type compressive event (one plate was pushed overtop the other) the second was a non-compressive event.

      the way I interpret this, and without seeing the geologic section, is that the outer, pacific plate was pushed overtop of the inner japanese plate then the japanese plate cracked because of the extra weight of the pacific plate being pushed on top of it.

      hope that helps a bit.

      • krugthecaveman krugthecaveman

        Thanks I understood correctly then. This was quite a large "event" then. That whole region seems ready to? ????

      • PhilipUpNorth PhilipUpNorth

        Right, except that the Pacific Plate is actually in the process of subducting under the Japanese Plate.

    • hbjon hbjon

      This was a significant event not to be taken lightly. One must assume the worst because of the instability of the fuel situation at units 1,2,3 and 4.

  • TheBigPicture TheBigPicture

    Man can't do a thing about a quake (any quake, ever). As for the spent fuel pool, all we can do is hope.

  • razzz razzz

    The Pacific plate crashes into the Eurasian plate. Something has to give so the Pacific begins diving under the Eurasian plate still traveling towards Japan's direction. As the Pacific plate dives it catches and snags the edge of the Eurasian plate and takes it down with it including eventually the entire island of Japan.

    Even though the Pacific plate is diving down it is also continuously moving forward crashing, diving and folding under the Eurasian plate, forcing areas of the Eurasian plate far inland to crash into the Indo-Australian plate and bulge up from pressure and movement, meaning the Himalayas are still growing taller.

    After all that it gets complicated.

    Once they figure out the details there will be a nice drawing to explain it or a 3D video to confuse you even more.


  • H.-P. Beaumont H.-P. Beaumont

    Why aren´t they paying attention – by the way – this week the EU got the Nobel Peace Price (i think to keep the public calm) – what troubles me most is that all politicians and policymakers are focusing on helping financial institutions and rescuing their worthless currencies instead of rescuing humanity and opening their eyes – instead they close their hearts and think this won´t influence my personal surroundings. It is really a pity. They all cry out to think global – but concerning their income and so called wealth they only think about themselves. Greed – our enemy No.1 –

  • obewanspeaks obewanspeaks

    Yes H.-P., you are very wise my friend…

  • Sickputer

    Well the good thing is the 7.4 earthquake wasn't 100 miles closer. If it was a direct hit then our conversations would be a lot different.

    Now if an 8.0 of above hits 160 miles away… Sayonara!

  • AGreenRoad AGreenRoad

    The Petkau Effect And Low Dose Radiation Harm Caused To Humans, Plants, Animals; via A Green Road

  • AGreenRoad AGreenRoad

    Gorbachev; Chernobyl Nuclear Accident Was Real Cause Of The Collapse of Soviet Union; via A Green Road http://agreenroad.blogspot.com/2012/12/gorbachev-chernobyl-nuclear-accident.html

  • AGreenRoad AGreenRoad

    It's complicated, but ultimately, the FUKU disaster will spell doom to the country of Japan, just as it did to the Soviet Union..

    It is like watching a bus drive off a cliff in slow motion, full of passengers… while the driver is saying to all of the passengers…

    "Everything is fine, keep smiling, no need to worry, there is no immediate chance of harm".