Abstract
The results of registration of the catastrophic earthquake of March 11, 2011, that occurred near Honshu Island (Japan) with the broadband bottom seismograph of the Oceanology Institute, Russian Academy of Sciences on a test bed of the Experimental Design Bureau of Oceanologic Equipment (EDBOE), Russian Academy of Sciences (Moscow) are considered. The specification of the equipment and conditions of the experiment are presented. The records of the earthquake made in EDBOE and those made with a seismograph at the University of Portland (Oregon, United States) are compared, since these registration points are located at identical distances from the epicenter, but the distributions of seismic waves are essentially different. The possible directions of the development of methods and equipment for forecasting strong sea earthquakes and tsunami are examined.
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