Tag Archives: subduction

Nepal’s Missing Volcanoes

Last month’s devastating earthquakes in Nepal were caused by the collision of the Indian subcontinent crashing into and (partly) under the bulk of Asia. The Himalayas are being created by the collision of tectonic plates. So, where are the volcanoes? … Continue reading

Posted in Geology, How Geophysics Works, Oceans, Plate Tectonics | Tagged , , , , | 11 Comments

Harry Hess and the Sea’s Floor

What does a commander of a World War II assault transport ship do in his spare time? If the captain is Harry Hammond Hess, he would be gathering geophysical data enroute to Iwo Jima. Later, he would use the data … Continue reading

Posted in Biography, Exploration, Geology, History, How Geophysics Works, Oceans, Plate Tectonics, The Book | Tagged , , , , , | 3 Comments

Tonga Shakes. Again.

Tonga. It’s an archipelago for the seismic history books. Tonga is in the news again, this time the submarine volcano Hunga Tonga-Hunga Ha’apai was spotted by NASA satellites because the eruptions discoloured the Pacific waters amidst the island kingdom’s 176 … Continue reading

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When Tectonics Started

The Earth is the only planet known to have continents adrift. Scientists are rather certain that the drifting began about a billion years into Earth’s history. This means that for a thousand million years, the continents just sat there. Idle. … Continue reading

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Signs of Plate Tectonics on Europa – Ice Plates, that is.

There is a lot to like in this next story. Life may exist on an ice-world that glows red in the light of Jupiter’s torch. This is an interesting idea derived from NASA data that had been sitting on a … Continue reading

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Into Subduction

On some level, we are all into subduction. But not many of us apply for the license. If you sometimes follow Randall Munroe’s creative web comic xkcd, then you may have seen this comic. What does it mean? I’d like … Continue reading

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Chile Shaking. . . it will happen again, of course

Earlier this week, geophysicists reported an analysis of the April 1, 2014, Chilean earthquake which killed six and displaced tens of thousands close to the epicenter near the Peru border. They said the new study is yielding information which may … Continue reading

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