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Tag Archives: Japan

Earthquake warning systems are hard, but not having one is worse.

Posted on January 11, 2018 by Chris Rowan

The premise of earthquake early warning systems is simple. An earthquake produces several different kinds of seismic waves that race away from the rupture point. Because they are different kinds of vibrations, they travel at different speeds; and the farther … Continue reading →

Categories: earthquakes, geohazards, geophysics, links, society

The humbling legacy of the Tohoku earthquake

Posted on March 13, 2012 by Chris Rowan

A year ago on Sunday, one of the biggest earthquakes ever recorded ruptured the subduction megathrust that dips beneath the east coast of Japan. The rupture displaced the seafloor by tens of metres and generated tsunami waves up to 20 … Continue reading →

Categories: earthquakes, geohazards, tectonics

Earthquake location matters, part eleventy

Posted on April 12, 2011 by Chris Rowan

It’s been a month since the Tohuku earthquake and tsunami rattled then swamped northern Honshu, and Japan continues to be rattled by sizeable aftershocks. A magnitude 7.1 shock last Thursday initially set off further tsunami alerts but the rupture turned … Continue reading →

Categories: earthquakes, focal mechanisms, geohazards, society

Sendai/Tohoku earthquake round-up

Posted on March 20, 2011 by Chris Rowan

It’s hardly surprising that my browsing this week has been focussed largely on the aftermath of the earthquake and tsunami in Japan (which is now officially being referred to as the Tohuku earthquake, rather than the Sendai earthquake; I’d complain … Continue reading →

Categories: earthquakes, geohazards, links