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  1. The magnitude 9.1 ( M w) undersea megathrust earthquake occurred on 11 March 2011 at 14:46 JST (05:46 UTC) in the north-western Pacific Ocean at a relatively shallow depth of 32 km (20 mi), [7] [54] with its epicenter approximately 72 km (45 mi) east of the Oshika Peninsula of Tōhoku, Japan, lasting approximately six minutes.

    • 6 minutes
    • 2011-03-11 05:46:24
    • 11 March 2011
    • 14:46 JST
  2. This is a list of earthquakes in 2011. Only earthquakes of magnitude 6 or above are included, unless they result in damage and/or casualties, or are notable for some other reason. All dates are listed according to UTC time. The 9.1 Tōhoku earthquake was the fourth most powerful ever recorded and triggered a massive tsunami (around 20,000 deaths).

    • 20,927
    • Japan, 9.1 Mw
  3. Events in this list and shown in red on our real-time earthquake map and list are considered “significant events’, and they are determined by a combination of magnitude, number of Did You Feel It responses, and PAGER alert level. Here is the equation: mag_significance = magnitude * 100 * (magnitude / 6.5);

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    • How It Happened
    • High Costs
    • from Peril to Preparedness
    • References

    The 2011 event resulted from thrust faulting on the subduction zone plate boundary between the Pacific and North America plates, according to the U.S. Geological Survey(link is external). This region has a high rate of seismic activity, with the potential to generate tsunamis. Past earthquakes that generated tsunamis in the region have included the...

    The damage makes the 2011 Great East Japan earthquake and tsunami the most expensive natural disaster in historyIn Japan, the event resulted in the total destruction of more than 123,000 houses and damage to almost a million more. Ninety-eight percent of the damage was attributed to the tsunami. The costs resulting from the earthquake and tsunami i...

    To learn from the tragedy in Japan, researchers collected extensive data on tsunami wave forces and building performance. This facilitated improvement in tsunami mitigation strategies, such as building codes. Over 6,200 tsunami wave measurementswere collected in Japan and the Pacific region. Several thousands of lives across the world were lost to ...

    Kong, L., P. Dunbar, and N. Arcos (2015). Pacific Tsunami Warning System: A Half-Century of Protecting the Pacific 1965-2015. Honolulu: International Tsunami Information Center. Satake, K. (2014). Chapter 24, The 2011 Tohoku, Japan, Earthquake and Tsunami. Extreme Natural Hazards, Disaster Risks and Societal Implications, Cambridge University Press...

  5. Aug 04, 2021 · Ten years ago, in the early afternoon of August 23, 2011, millions of people throughout the eastern U.S. felt shaking from a magnitude 5.8 earthquake near Mineral, Virginia. No lives were lost, something experts called “lucky” given the extent of shaking, but property damage was estimated to be in the range of $200 to $300 million.

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