Another Earthquake before March 11, 2011
On March 11, 2011, an M9.0 earthquake was set off under the Pacific Ocean between Honsyu Island and the Japan trench.
This undersea earthquake with the epicenter 100 km off Sendai City triggered 10-meter high tsunamis which devastated Japanese coast lines over 500 km mostly north of Tokyo. These tsunamis crippled the Fukushima Daiichi Nuclear Power Plant, too.
Recently Japanese scientists found that this March 11 earthquake was an indirect product of another earthquake.
On March 9, 2011, two days before March 11, an M7.3 earthquake occurred near the epicenter of the M9.0 earthquake. It caused slow sliding of a great mass of undersea land toward the Japanese trench.
The movement of the sliding seems to have been accelerated to a high speed near the Japanese trench in the Pacific Ocean. Probably due to this kinetic energy, a fault near the trench slid for 50 meters or so. And, an influenced area of this sliding expanded from the north to the south, making massive force converge on the epicenter of the M9.0 earthquake. Finally on March 11, a big fault was destroyed by this force to cause the M9.0 earthquake which eventually took on 20,000 people and destroyed four nuclear reactors of Fukushima Daiichi.
http://www.ab.cyberhome.ne.jp/~catfish/event/2011tohokuoki.html In the above figure, the brown lines, including the Japanese trench along with the straight line A to B, are boundaries between continental plates. Note that 2011/03/11 05:46 means March 11, 2011 at 2:46 p.m. (Japan Time). M9.1 was later corrected to Magnitude 9.0.
So, if earthquake seismology had been more advanced on March 9, 2011, scientists should have been able to catch a sign that a huge but slow undersea land slip was triggered. They must have been able to predict another big earthquake coming soon. Then, many lives must have been saved and the nuclear accident might have been avoided.
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Mar 3:10 For he had healed many; insomuch that they pressed upon him for to touch him, as many as had plagues.