Category Archives: tectonics

Friday Focal Mechanisms: South Australian shaking keeps Chris guessing

A Friday focal mechanism…without a focal mechanism! Can the seismic past be the key to the present? Continue reading

Categories: earthquakes, focal mechanisms, tectonics

A mountain (meta)geologist

As you might have noticed, my blogging has been a little thin on the ground recently, which means I have been remiss in pointing you to some sterling posts from fellow All-geo blogger Simon Wellings, who is writing a whole … Continue reading

Categories: geology, links, structures, tectonics

The humbling legacy of the Tohoku earthquake

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

Friday(ish) Focal Mechanism: a kinky slab beneath Mexico

A quick look this week at the magnitude 6.5 earthquake that shook southern Mexico last Sunday. It caused a fair amount of shaking in Mexico City, and a few deaths, but apparently no major structural damage. The depth of the … Continue reading

Categories: earthquakes, focal mechanisms, tectonics

The Oklahoma Earthquakes

There was some slight seismic excitement over the weekend in central Oklahoma: a magnitude 4.7 earthquake shook things up early on Saturday morning, which turned out to be the prelude to magnitude 5.6 tremor late Saturday evening. The focal mechanisms … Continue reading

Categories: earthquakes, focal mechanisms, tectonics