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Japan - Major Earthquake Magnitude 9.0 on Mar 11, Sanriku Oki (7.2 on March 9) - Official number of dead and missing 28,000+ - March 8 - March 26
Re: Japan - Major Earthquake Magnitude 9.0 on Mar 11, Sanriku Oki (7.2 on March 9) - Official number of dead and missing 12,000+
The 2011 off the Pacific coast of Tohoku Earthquake -
[this is the official name and initial information of this eartthqaute, as displayed by the Japan Metereological Agency]
The 2011 off the Pacific coast of Tohoku Earthquake ~first report~
Note: This is a rush version, which may include translation errors.
A massive earthquake of magnitude of 9.0 occurred Friday 11 March, off the Pacific coast of the northeastern part of the Japanese main land (Tohoku Region), causing devastating damages. The Japan Meteorological Agency named this earthquake "The 2011 off the Pacific coast of Tohoku Earthquake."
Earthquake Summary
<table style="border: 1px solid black; border-collapse: collapse;" border="1"> <tbody><tr><td>Date and Time:</td><td>11 March 2011 14:46 JST (05:46 UTC)</td></tr> <tr><td>Magnitude:</td><td>9.0 (interim value; the largest earthquake recorded in Japan)</td></tr> <tr><td>Hypocenter:</td><td>130km off the Pacific coast of Tohoku region, from Iwate to Ibaraki Prefectures, 24km depth</td></tr> <tr><td>Mechanism:</td><td>Reverse fault type with WNW-ESE compressional axis (by CMT analysis)</td></tr> <tr><td>JMA Seismic Intensity:</td> <td> <table style="border: 1px dotted gray; border-collapse: collapse;"> <tbody><tr><td style="border: 1px dotted gray;">7 (Max)</td><td style="border: 1px dotted gray;">Kurihara City of Miyagi Prefecture</td> </tr><tr><td style="border: 1px dotted gray;">6+</td><td style="border: 1px dotted gray;">28 cities and towns (including Wakuya Town, Tome City, Osaki City, Natori City) in Miyagi, Fukushima, Ibaraki, and Tochigi Prefectures</td> </tr><tr><td style="border: 1px dotted gray;">6- or weaker</td><td style="border: 1px dotted gray;">Observed nationwide from Hokkaido to Kyushu</td></tr></tbody> </table> </td></tr> <tr><td>Tsunami Warnings and Advisories:</td><td>Please refer to real-time information at http://www.jma.go.jp/en/tsunami/</td></tr> </tbody> </table> Observed Tsunami
High tsunamis were observed on the Pacific coast from Hokkaido to Okinawa. In addition, tsunami were also observed on the coasts of the Sea of Japan, Sea of Okhotsk, and East China Sea.
Aftershocks
Number of strong aftershocks have occurred in the area off the coast of Iwate, Miyagi, and Ibaraki Prefectures, which is considered as the source region of the main shock. The area is so large that, when compared to past cases, the activity of aftershocks is very high.
JMA Seismic Intensity of aftershocks will often be 5- or heavier, and it may sometimes reach 6- or 6+.
Tsunami may occur after a strong aftershock. Be cautious when a tsunami warning or advisory is issued.
Estimating from the occurrence of aftershock so far, the possibility of aftershocks with magnitude of 7 or higher is 70% until 10 a.m., 16 March, followed by 50% until 10 a.m., 19 March.
Re: Japan - Major Earthquake Magnitude 9.0 on Mar 11, Sanriku Oki (7.2 on March 9) - Official number of dead and missing 12,000+
That's an incredible video. It's interesting that the water was surfacing very quickly after the earthquake.
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"The next major advancement in the health of American people will be determined by what the individual is willing to do for himself"-- John Knowles, Former President of the Rockefeller Foundation
Re: Japan - Major Earthquake Magnitude 9.0 on Mar 11, Sanriku Oki (7.2 on March 9) - Official number of dead and missing 12,000+
Thank you Makoto for posting that video. Really incredible.
I think it is liquifaction because I hear and see the sand coming up out of the ground before the water. This is what Sally explained to me about what she saw in New Zealand.
Re: Japan - Major Earthquake Magnitude 9.0 on Mar 11, Sanriku Oki (7.2 on March 9) - Official number of dead and missing 12,000+
Yes it is liquifaction.
Water and sand come up out of the ground. It floods the houses, sewers, storm water drains, etc. When the water drains away the sand/silt is left behind.
Here is a video showing the process of liquifaction in a wheelbarrow.
<iframe title="YouTube video player" src="http://www.youtube.com/embed/1KqlAMWMjOE" allowfullscreen="" frameborder="0" height="390" width="640"></iframe>
Re: Japan - Major Earthquake Magnitude 9.0 on Mar 11, Sanriku Oki (7.2 on March 9) - Official number of dead and missing 12,000+
#124 video ver
<iframe title="YouTube video player" width="640" height="390" src="http://www.youtube.com/embed/4-mkzcxnJS8?rel=0" frameborder="0" allowfullscreen></iframe>
Re: Japan - Major Earthquake Magnitude 9.0 on Mar 11, Sanriku Oki (7.2 on March 9) - Official number of dead and missing 12,000+
Sally: That's a very good video of liquifaction. I also like the next one, taken in a residential neighborhood.
Just imagine how many thousands of people will watch that wheelbarrow of dirt.
Do the structures have any permanent "sinking" after a quake with that much liquifaction, i.e., does their elevation go down?
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"The next major advancement in the health of American people will be determined by what the individual is willing to do for himself"-- John Knowles, Former President of the Rockefeller Foundation
Re: Japan - Major Earthquake Magnitude 9.0 on Mar 11, Sanriku Oki (7.2 on March 9) - Official number of dead and missing 12,000+
Amazing and terrifying videos. I know geologists say that Seattle will have some big problems with liquefaction in a major quake. I had no idea what that entailed until watching videos. (And in so many places lately.)
"...there’s an obvious contest that’s happening between different sectors of the colonial ruling class in this country. And they would, if they could, lump us into their beef, their struggle." ---- Omali Yeshitela, African People’s Socialist Party
(My posts are not intended as advice or professional assessments of any kind.) Never forget Excalibur.
Re: Japan - Major Earthquake Magnitude 9.0 on Mar 11, Sanriku Oki (7.2 on March 9) - Official number of dead and missing 12,000+
Liquifaction is a real problem for homes that are built in low-lying areas (where the groundwater is near the surface) where the footers are not seated into rock. Even a small earthquake can cause the foundation to shift and crack.
That was a great video that demonstrates it in an easy-to-understand visual.
"I know God will not give me anything I can't handle. I just wish that He didn't trust me so much." - Mother Teresa of Calcutta
"The next major advancement in the health of American people will be determined by what the individual is willing to do for himself"-- John Knowles, Former President of the Rockefeller Foundation
Re: Japan - Major Earthquake Magnitude 9.0 on Mar 11, Sanriku Oki (7.2 on March 9) - Official number of dead and missing 12,000+
Here's where liquifaction is most likely:
Liquefaction is restricted to certain geologic and hydrologic environments, mainly areas where sands and silts were deposited in the last 10,000 years and where ground water is within 30 feet of the surface. Generally, the younger and looser the sediment and the higher the water table, the more susceptible a soil is to liquefaction.
"The next major advancement in the health of American people will be determined by what the individual is willing to do for himself"-- John Knowles, Former President of the Rockefeller Foundation
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A massive earthquake of magnitude of 9.0 occurred Friday 11 March, off the Pacific coast of the northeastern part of the Japanese main land (Tohoku Region), causing devastating damages. The Japan Meteorological Agency named this earthquake "The 2011 off the Pacific coast of Tohoku Earthquake." 
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