Category Archives: focal mechanisms

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

Friday Focal Mechanism: M 7.4, Oaxaca, Mexico

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

Two more earthquakes shake Christchurch

Just as it seemed that seismic activity was finally dying down in Christchurch, the city has been shaken by two more earthquakes. The USGS currently has the first shock pegged as a magnitude 5.8, and the second as a magnitude … Continue reading

Categories: earthquakes, focal mechanisms, geohazards

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

Friday focal mechanisms: aftershocks in eastern Turkey

Almost a fortnight after a magnitude 7.1 earthquake shook Eastern Turkey, the region continues to suffer from aftershocks, and there were two pretty big ones earlier this week: a magnitude 5.2 on Tuesday, and then a magnitude 5.6 on Wednesday. … Continue reading

Categories: earthquakes, focal mechanisms, geohazards