swarms of Richter scale 5 and 6 earthquakes in Christchurch Plus a 7 off Japan

Posted: January 2, 2012 by tallbloke in solar system dynamics

More earthquakes have frightened residents of Christchurch New Zealand and Japan. The worst possible start to the New Year. Our concern and good wishes go out to all affected by these events. According to the NZ Timeslive website:

New Zealand’s quake-ravaged city of Christchurch was rocked Monday by 17 earthquakes in 18 hours.

Image Courtesy of timeslive.co.uk

No serious damage was reported from the swarm, which included two shakes stronger than magnitude 5 and another six between magnitude 4 and 5.

The City Council issued a statement asking the “community to look after neighbours, friends and family and take care during this difficult time.”

The South Island’s largest city has been racked by quakes since September 2010, including one in February that killed 181 people.

The first tremor, measuring 3.9, hit at 1:27 am (12:27GMT Sunday), and the city kept shaking with a significant tremor of magnitude 4.8 just before 7pm, the state GeoNet organization, which monitors quakes, reported.

A double shock 12 seconds apart with the biggest of magnitude 5.5 struck before dawn and triggered an automatic power shutoff to 10 000 homes, but electricity was restored by 8am.

Detailed maps and reports here: http://www.geonet.org.nz/earthquake/quakes/recent_quakes.html

According to the Times of India:

A strong earthquake with a magnitude of 7.0 jolted eastern and northeastern Japan on Sunday, but there were no immediate reports of injuries or damages and no tsunami warning was issued.

The earthquake measured 4 in central Tokyo, Fukushima and their surrounding areas on the Japanese intensity scale, which measures ground motion, according to Japan Meteorological Agency, which uses a different measuring system than the the U.S. Geological Survey.

All the quakes were relatively shallow at depths of 8 km to 20 km and centred close to the city.

Using techniques built on the work of Rafaele Bendandi, Talkshop contributor Michele Casati warned yesterday of possible earthquake action in the near future, peaking near the middle of this month.

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  2. Pete H says:

    Michele Casati warned yesterday 404 error T.B.

    [Reply] Fixed, thanks.

  3. adolfogiurfa says:

    A very interesting link, given by Prof.Piers Corbyn: (Cause & Effect)

  4. tallbloke says:

    Grazie Michele
    send email today if you can.
    Work for me tomorrow.

  5. Hi all,

    I do make earthquake research since the early 90s. My basis is the geocentric ecliptic plane and two geometries. One is a summation of modes build by integer division of the ecliptic circle and the other is a mirror plane to the local south meridian of the quake. It is clear, that only a quake can occur if the local meridian is on a border of two plates at that time. For that it is easier to calculate the time of a major quake than the longitude plus the latitude. Unfortunately no one seems to be interested in such research. I think there is no magic on it. There must be only some unknown things in physics, corresponding to the trigger geometry which let crash the plates. I did one prediction a half a year before a major quake and I was wrong in time for 35 Minutes, and wrong about ~135° in the longitude of the location. It was in the South Atlantic and I have believed it was Jakarta. It was a repeating of the configuration of the Xmas quake in 2004 on the 6th of January 2006.


  6. Aussie says:

    New Zealand and Japan are on the Pacific ring of Fire. The earth tremors are not unusual in New Zealand but these ones hitting Christchurch are bad.

    Also New Zealand, especially the north island has a lot of volcanoes.

    What I found so interesting is that in Wellington and Hawkes Bay where there have been deadly earthquakes in the past, there was an increase in the land and today that land is being utilised. The tour guides are very precise about getting that message across.

    There had been constant aftershocks in Christchurch since the earthquake in September 2010. They were not sure if the February 2010 quake was new or an aftershock. What is known about that quake was that it was shallow, and that the epicentre was in the middle of Lyttleton harbour. The last tremor that has caused liquefaction of the roads was also shallow.

  7. anon2nz says:

    While the latest quakes have been larger than what was being experienced, actually Christchurch has had 9605 earthquakes since “the big one” on September 4 2010 (up to 12.34 today) so this new swarm is part of a much larger series of movement.

    The best graphic of what is going on is here:

    and it shows that the earthquakes have over time been moving east along the front, and are now primarily centred just off short in Pegasus Bay. If you want the more recent ones just pick the time frame at the top. If you want to see the lot click the “sticky dots” box and then use the arrows to go to the very end.

  8. Aussie says:

    Thank you for posting that map anon2nz, it shows quite a bit about where the tremors were felt immediately after the first big one.

    No wonder so many houses around Rolleston were damaged!!

  9. ChrisM says:

    This is always the best site for earthquake info:
    One can watch the quakes near live on the site as well