Tag Archives: Mexico

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

Friday Focal Mechanism: M 7.4, Oaxaca, Mexico

Posted on March 23, 2012 by Chris Rowan

The largest earthquake to hit the planet this week was in Mexico, which was shaken on Tuesday by a magnitude 7.4 earthquake. The epicentre was in the Oaxaca region about 300 kilometres southwest of Mexico city, and the rupture was … Continue reading →

Categories: earthquakes, focal mechanisms, geohazards

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

Posted on December 17, 2011 by Chris Rowan

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