·

Japan’s earthquakes and tectonic setting

japan-earthquakes-tectonic-setting

Japan has more measurable earthquakes than any other country and has over 100 active volcanoes. These both result from Japan being wedged among four major tectonic plates.

The tectonics are complicated, but in this animation, IRIS attempted to look at the basic mechanics of the region as they focused on two famous earthquakes: the 1995 Kobe (Great Hanshin) earthquake and the 2011 Tohoku-Oki earthquake. It is necessarily simplified to depict basic processes.

YouTube video

Video courtesy IRIS

Although there are many published fault-displacement models derived from fitting different sets of observations (teleseismic waveforms, tsunami heights, GPS displacements, seafloor deformation, etc.), there is considerable disagreement between those fault-displacement models.

For a variety of reasons, the animation group decided to illustrate the fault-displacement model of Jiang and Simons, 2016, Journal of Geophysical research, 10.1002/2016JB013760.

Written & directed by Dr. Robert F. Butler, University of Portland
Animation & graphics by Jenda Johnson, Earth Sciences Animated
Narrated by Wendy Bohon, Informal Education Specialist, IRIS

Scientific review:

Dr. Hiroyuki Tsutsumi, Doshisha University (堤 浩之, 同志社大)
Dr. Chris Goldfinger, Oregon State University
Dr. Lori Dengler, Humboldt State University

Featured image credit: Incorporated Research Institutions for Seismology (IRIS)

Share:

Commenting rules and guidelines

We value the thoughts and opinions of our readers and welcome healthy discussions on our website. In order to maintain a respectful and positive community, we ask that all commenters follow these rules:

  • Treat others with kindness and respect.
  • Stay on topic and contribute to the conversation in a meaningful way.
  • Do not use abusive or hateful language.
  • Do not spam or promote unrelated products or services.
  • Do not post any personal information or content that is illegal, obscene, or otherwise inappropriate.

We reserve the right to remove any comments that violate these rules. By commenting on our website, you agree to abide by these guidelines. Thank you for helping to create a positive and welcoming environment for all.

One Comment

Leave a reply

Your email address will not be published. Required fields are marked *