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- Hope Jahren, isotope detective
- Scenic Saturday: Upper Mississippi Islands
- Stuff we linked to on Twitter last week
- 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
Latest Comments
- On Hope Jahren, isotope detective :
- Lab Lemming: Translating the inside baseball isotope talk above: http://lablemminglounge.blo... (8 days 20 hours ago)
- Hope Jahren: Picarro, but if I had to do it over again I’d go Los Gatos. Long story. (9 days 9 hours ago)
- Lab Lemming: Los Gatos or Picarro? (9 days 9 hours ago)
- Matt Herod: The map of Hawaii looks like a mineral grain in thin section. Very cool. (20 days 12 hours ago)
- The Bobs: The colors on Io’s surface are primarily caused by allotropes of sulfur. Do geologists know... (55 days 11 hours ago)
- Peter Council: I won’t stand for disruptive behaviour, but I’m not that good at dealing with it, simply... (44 days 1 hour ago)
- Pam: As a non-geologist, I am hoping you have something posted about the Wisconsin booms which are being... (53 days 17 hours ago)
- terry: This didn’t fill in the Guerrero Gap. (54 days 10 hours ago)
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Category Archives: geophysics
Now that’s what I call a geomagnetic storm!
It appears that I was a litte premature with yesterday’s post. Look at what happened to the ambient magnetic field at the two observatories at Boulder and Deadhorse today (the dotted line represents about where the plots I put up … Continue reading
Categories: geohazards, geophysics, palaeomagic, planets
The Earth weathers another geomagnetic storm
A couple of days ago, the sun got a bit excitable: This large flare produced what is known as a Coronal Mass Ejection (CME), a blob of gas and radiation hurled at high velocities from the surface of the sun … Continue reading
Categories: geophysics, palaeomagic, planets
Does plate tectonics control magnetic reversals?
Possibly, but this paper will not convince you. Continue reading
Categories: Cenozoic, geophysics, Mesozoic, palaeomagic, tectonics
Why does a compass point north? A mystery at the heart of the story of science (book review)
Strange as it might seem, I’m finding North Pole, South Pole, paleomagnetist Gillian Turner’s newly published account of “the epic quest to solve the great mystery of Earth’s magnetism”, a difficult book to review. It’s not that I didn’t enjoy … Continue reading
Earthquake ‘precursors’ and the curse of the false positive
Whenever you read a story that describes some phenomenon that preceded a large earthquake, and dangles the carrot of true earthquake prediction, don’t just look at the headline event. Check for false positives. Continue reading
Aftershocks of the Sendai earthquake
On a map of global earthquake activity, Japan rather stands out right now: a pulsing boil of seismic activity that all but drowns out the shaking in the rest of the world. As of a few hours ago (5pm Central … Continue reading
Shaking in Christchurch boosted by seismic lensing?
Even taking into account how close the rupture point of Tuesday’s earthquake was to Christchurch, the intensity of the shaking – and the amount of damage that the city suffered as a consequence – seems to be very high for … Continue reading
Friday Focal Mechanism: Magnitude 7.2, Western Pakistan
Why are we getting an extensional earthquake at a convergent plate boundary? Continue reading
Yellowstone: what lies beneath
The best evidence yet that the Yellowstone hotspot is the result of a mantle plume – one that had to burn through a subducting slab to get to the surface. Continue reading
