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The Authors
For lot's more videos on soil moisture topics, see Drs Selker and Or's text-book support videos https://www.youtube.com/channel/UCoMb5YOZuaGtn8pZyQMSLuQ/playlists
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Category Archives: geophysics
Earthquake warning systems are hard, but not having one is worse.
The premise of earthquake early warning systems is simple. An earthquake produces several different kinds of seismic waves that race away from the rupture point. Because they are different kinds of vibrations, they travel at different speeds; and the farther … Continue reading
A Seismic Summary of 2017
Why 2017 was a quiet year – and an examination of the provocative hypothesis that 2018 may not be. Continue reading
A cross-section through the Earth
One of the first things I do in my introductory geology class is talk about the structure of the Earth. Knowing the names, composition and physical properties of the different layers is an important foundation for the rest of the … Continue reading
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
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
Nice plan for content warnings on Mastodon and the Fediverse. Now you need a Mastodon/Fediverse button on this blog.