Category Archives: tectonics

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

Antarctica field log: Penguin Island? Surely you mean Volcano Island!

But yes, there were penguins too. Continue reading

Categories: Antarctica, outcrops, photos, tectonics, volcanoes

Scenic Saturday: our stripy oceans, explained 50 years ago today!

A slightly different Scenic Saturday this weekend, as we celebrate an important milestone in geological science: a look at the South Pacific through a geophysical lens. The colours on this map show fluctuations in the Earth’s magnetic field produced by … Continue reading

Categories: geology, palaeomagic, tectonics

In large earthquakes, the Earth moves for almost everyone

The Global Positioning System has completely revolutionised how geologists study the deformation of the Earth. If you leave a GPS receiver in a fixed location for days, months and years, it is precise enough to measure motions on the millimetre … Continue reading

Categories: earthquakes, paper reviews, tectonics

Echoes of Wenchuan: magnitude 6.6 earthquake shakes Sichuan province in west China.

On Saturday morning local time (Friday evening for us in the USA), a magnitude 6.6 earthquake shook up Sichuan province in western China, about 35 km north of the closest city, Ya’an, and 115km west of the provincial capital Chengdu. … Continue reading

Categories: earthquakes, focal mechanisms, tectonics