Category Archives: geophysics

Reconstructing ocean spreading when half your record is now in the mantle (or: a plug for my new paper)

If you’re studying the last 100 million years or so of plate tectonics, the history of sea-floor spreading recorded by the magnetic stripes that parallel and extend away from the Earth’s ocean ridges is a key source of information. Each … Continue reading

Categories: geology, geophysics, palaeomagic, tectonics

We have a seismometer in our basement…

Or, more accurately, my department does. And it rather handily picked up last week’s magnitude 8 earthquake near the Santa Cruz Islands (subject of the latest Friday Focal Mechanisms), all the way over in the southwest Pacific. Here’s the seismogram: … Continue reading

Categories: earthquakes, geophysics

Earthly and Unearthly Beauty

NASA unveiled a couple of rather beautiful things at AGU last week – and despite actually being at the conference, I haven’t really had the time to sit back and appreciate them until now. The first was the ‘Black Marble’, … Continue reading

Categories: climate science, geology, geophysics, photos, planets

AGU Dispatches: Final Day and Final Thoughts

Unless you are presenting, the final day of a 5 day-conference can be a test of your intellectual fortitude: it can be tough to force your tired and stuffed-with-cool-new-science brain to take an interest in any more talks or posters. … Continue reading

Categories: academic life, conferences, earthquakes, geohazards, geology, geophysics, tectonics

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