Tag Archives: Cascadia

317 years since the last rupture of the Cascadia megathrust

At around 9pm on the 26th January 1700, the Cascadia subduction zone – a shallowly dipping thrust fault that runs more than 1000 km north from Cape Mendocino in Northern California to the vicinity of Vancouver Island, ruptured in an estimated magnitude 9 earthquake. Continue reading

Categories: earthquakes, geohazards, society

Sumatra +10: contemplating the power of tsunami

Whilst touring Port Lockroy in Antarctica last Christmas Day, one of the exhibits describing the scientific research undertaken there had this interesting footnote: This is pretty mind-blowing, if you think about it: an isolated Antarctic outpost at around 65 degrees … Continue reading

Categories: earthquakes, geohazards, society

The slowly building threat of Cascadia – and the slow realisation it was there (book review)

If you asked the average person on the street which part of the USA was most threatened by earthquakes, most of them would probably say California. The San Andreas Fault is so embedded into the popular consciousness that it is … Continue reading

Categories: earthquakes, geohazards, reviews

Reverberations of the Honshu tsunami

On Friday 11 March 2011, when the fault ruptured off of the Japanese coast in a M9.0 earthquake, it caused a sudden vertical movement of the seafloor, displacing the water above it and transferring energy to the ocean. As the … Continue reading

Categories: basics, by Anne, geohazards, tectonics