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7.4-Magnitude Earthquake Strikes Off Japan; Tsunami Alert Issued

Posted by ryuzaki0 on from the oh-crap-not-again dept.

There is breaking news that a 7.4 Magnitude Quake has hit off the coast of Japan, and a Tsuanmi warning has been made. Please post updates in the comments.

11 of 313 comments (clear)

  1. Fastest slashdot story ever! by inu_maru · · Score: 5, Informative

    I am still dizzy from the shake (living in yokohama), plenty of blurry images right now in http://www3.nhk.or.jp/nhkworld/

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    1. Re:Fastest slashdot story ever! by mc3000 · · Score: 5, Informative

      No injuries reported, according to NHK. This was in the vicinity of the 9.0 quake, 40 km below the sea bed off Sendai.

    2. Re:Fastest slashdot story ever! by Anonymous Coward · · Score: 4, Informative

      For ref, 'cos I was wondering, "shindo" is a japanese earthquake scale, not directly comparable to the richter scale (or the "moment magnitude" scale often mislabelled as richter in the media) - shindo is for various points on the earth's surface, richter for overall energy of quake.

  2. 2m high tsunami by AmiMoJo · · Score: 5, Informative

    According to the Japanese Meteorological Agency the tsunami is about 2m high. Coastal defences should be okay in most places but obviously anyone near the coast should retreat inland if possible.

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  3. Also in Mexico by f1vlad · · Score: 4, Informative
    https://twitter.com/#!/DanielnTexas/status/56007743731015680

    Magnitude 6.5 - VERACRUZ, MEXICO http://goo.gl/b591M

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  4. Re:7.4 != 9.2 Not even close. by 140Mandak262Jamuna · · Score: 4, Informative

    The correct ratio seems to be 31 ^ ( 9.2 - 7.4 ) = 483. So this earthquake would be considered a moderate one, about 500 times less powerful than the 9.2 that stuck a few weeks ago.

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  5. tsunami warning URL by mrflash818 · · Score: 4, Informative

    http://www.jma.go.jp/en/tsunami/

    "Occurred at 23:32 JST 07 Apr 2011
    Region name Miyagi-ken Oki
    Depth about 40 km
    Magnitude 7.4"

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  6. Article on MercuryNews.com by De+Lemming · · Score: 4, Informative

    Article: Magnitude 7.4 earthquake hits off Japan coast

    Some quotes: "Officials say Thursday's quake was a 7.4-magnitude and hit 25 miles (40 kilometers) under the water and off the coast of Miyagi prefecture." "Buildings as far away as Tokyo shook for about a minute." "The Japan meteorological agency issued a tsunami warning for a wave of up to one meter." "Hundreds of aftershocks have shaken the northeast region devastated by the March 11 earthquake, but few have been stronger than 7.0."

  7. Japan Meteorological Agency Website... by torxim · · Score: 5, Informative

    For near real-time info surrounding the Tsunami impact http://www.jma.go.jp/en/tsunami/

  8. Really? BBC Twitter as your source? by thomasdz · · Score: 4, Informative

    The USGS is like a million times better.
        Here's the link: http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/usc0002ksa.php
    and here's the Tsunami info:
        http://ptwc.weather.gov/ptwc/text.php?id=pacific.2011.04.07.143955

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  9. Re:7.4 versus 9.0 by Kentari · · Score: 4, Informative

    One step in magnitude means a factor 10 increase in ground displacement. In energy this is about a factor 30 per magnitude. A 7.0 packs about 900 times less energy than a 9.0. The new earthquake has already been revised to 7.1.