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  1. The earthquake moved Honshu (the main island of Japan) 2.4 m (8 ft) east, shifted the Earth on its axis by estimates of between 10 cm (4 in) and 25 cm (10 in), increased earth's rotational speed by 1.8 µs per day, and generated infrasound waves detected in perturbations of the low-orbiting Gravity Field and Steady-State Ocean Circulation Explorer satellite.

  2. › wiki › TsunamiTsunami - Wikipedia

    The Pacific Tsunami Warning System is based in Honolulu, Hawaiʻi. It monitors Pacific Ocean seismic activity. A sufficiently large earthquake magnitude and other information triggers a tsunami warning. While the subduction zones around the Pacific are seismically active, not all earthquakes generate a tsunami.

  3. Sa magnitude a été estimée à 8,5. Il déclencha un tsunami avec un déferlement d'une hauteur maximale de 38 mètres, et tua 22 066 personnes [9]. Un autre eut lieu le 2 mars 1933, légèrement plus au nord, faisant environ 3 000 victimes causées par le tsunami à la suite du séisme avec un déferlement estimé à 28,5 m à Ofunato [8].

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