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- Hope Jahren, isotope detective
- Scenic Saturday: Upper Mississippi Islands
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- Friday Focal Mechanism: M 7.4, Oaxaca, Mexico
- Geological maps: still interesting even when there’s only one rock type
- Stuff we linked to on Twitter last week
- Scenic Saturday: from desert to verdant grassland in 10 miles (and 1000 m)
- The humbling legacy of the Tohoku earthquake
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- On Hope Jahren, isotope detective :
- Lab Lemming: Translating the inside baseball isotope talk above: http://lablemminglounge.blo... (8 days 19 hours ago)
- Hope Jahren: Picarro, but if I had to do it over again I’d go Los Gatos. Long story. (9 days 7 hours ago)
- Lab Lemming: Los Gatos or Picarro? (9 days 7 hours ago)
- Matt Herod: The map of Hawaii looks like a mineral grain in thin section. Very cool. (20 days 11 hours ago)
- The Bobs: The colors on Io’s surface are primarily caused by allotropes of sulfur. Do geologists know... (55 days 10 hours ago)
- Peter Council: I won’t stand for disruptive behaviour, but I’m not that good at dealing with it, simply... (44 days 0 hours ago)
- Pam: As a non-geologist, I am hoping you have something posted about the Wisconsin booms which are being... (53 days 16 hours ago)
- terry: This didn’t fill in the Guerrero Gap. (54 days 9 hours ago)
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Category Archives: tectonics
The many faces of earthquake triggering
Can large earthquakes beget more large earthquakes? It’s an easy question to ask, but much more difficult to answer. Depending on the distance from, and time since, the initial earthquake, the processes that may result in ‘seismic triggering’ are very … Continue reading
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
Magnitude 8.9 (or 9.0, or 9.1!) Earthquake off the coast of Japan
Around 3pm local time yesterday, there was a massive earthquake about 100 miles off the east coast of northern Honshu Island, Japan. Initially calculated to be a magnitude 8.9, it has since been upgraded: the current CMT solution at the … Continue reading
Aftershocks, triggered earthquakes, and Christchurch’s seismic future
As more scientific information becomes available regarding last week’s magnitude 6.3 earthquake in Christchurch, we can look a bit more closely at the nature of this earthquake, how it fits into the overall tectonic picture in New Zealand, and future … Continue reading
Magnitude 6.3 earthquake rocks Christchurch
[Note: see the bottom of this post for the latest updates and links - last update 26th February]. A few hours ago, Christchurch, the largest city on the South Island of New Zealand, was once again shaken by a large … Continue reading
Friday Focal Mechanism: Magnitude 7.2, Western Pakistan
Why are we getting an extensional earthquake at a convergent plate boundary? Continue reading
All quiet on the Alpine Fault?
The Alpine fault has not ruptured since European settlement in the 1840s. Paleoseismology tells us that this is the longest it has gone in a millenium without generating a magnitude 8+ earthquake. Continue reading
Tectonics of the M7 earthquake near Christchurch, New Zealand
This post was written in response to the Darfield earthquake in September 2010. The most recent seismic activity is discussed here. [Updated 8th September 1200 GMT – see bottom of post. And check out the PodClast discussion of this earthquake, … Continue reading
Friday Focal Mechanism
The earthquake that particularly caught my eye this week occurred on Tuesday off the coast of Mexico: This focal mechanism is pure strike-slip: that is, it is the result of two sides of a fault moving laterally past each other, … Continue reading
Friday Focal Mechanisms: Haiti, revisited
The new research that acquits the Enriquillo Fault of causing the Haiti earthquake. Continue reading
