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- Stuff we linked to on Twitter last week
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Category Archives: focal mechanisms
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
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
M 7.2 earthquake near Van, eastern Turkey
Earlier this morning, a magnitude 7.2 earthquake hit near the city of Van on the eastern border of Turkey. The BBC reports that at least 45 people have died as buildings collapsed close to the rupture. The most well-known seismic … Continue reading
Categories: earthquakes, focal mechanisms, geohazards, tectonics
Friday Focal Mechanisms: the Hayward Fault shows up to the Shakeout Party
Yesterday, several million Californians participated in the 2011 Great California ShakeOut – a simulated earthquake drill, held close to the anniversary of the 1989 Loma Preita earthquake, that aims not only to raise awareness of the ever-present risk of a … Continue reading
Categories: earthquakes, focal mechanisms, geohazards
Friday focal mechanism: mountain building in Argentina
Yesterday a magnitude 6.2 earthquake struck in the Jujuy province of northwestern Argentina, in the western foothills of the Andes. What few news reports there are indicate strong shaking but little damage in what seems to be a remote and … Continue reading
Categories: earthquakes, focal mechanisms, geohazards, structures
Seismo-volcanism in Eritrea
The Great Rift Valley marks where East Africa is slowly attempting to break away from the rest of the African continent, at a rate of less than a centimetre a year. At the north-eastern end of the rift, where it … Continue reading
More large aftershocks rattle Christchurch: will it ever end?
Analysis of the ongoing earthquake sequence. Continue reading
