Tag Archives: Geophysics

Monitoring Volcanic Eruptions Using Lightning

Volcanologist Alexa Van Eaton explains the origins of electrical activity in volcanic ash plumes and why it sometimes leads to detectable lightning. Continue reading

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Real-time observations explain magma dynamics of Kilauea’s 2018 eruption

Piston-like caldera collapses drove episodic lava flows far from the summit.  Continue reading

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Plants slow river migration

Rivers in unvegetated landscapes migrate an order of magnitude faster than their vegetated counterparts. Continue reading

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Volcano topography can distort ground deformation data

Cliff-like features could explain the anomalous measurements taken by tiltmeters deployed at Hawaii’s Kilauea and other volcanoes. Continue reading

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Measurements of elusive mineral could explain mantle discontinuity

A predicted phase transition shows up in high-pressure experiments. Continue reading

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Mineral measurements could explain mantle seismology

A predicted phase transition shows up in high-pressure experiments. Continue reading

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Mars smiles for InSight’s cameras

We look forward to learning more about Mars as InSight’s scientific operations commence. Continue reading

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Size-sorted sand creates uncommon length scale in windblown formations

A combination of grain-size distribution and critical wind speed is responsible for megaripples. Continue reading

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New tools for forecasting steam-blast eruptions

Satellite data can pinpoint predictors of future explosive activity. Read more in Physics Today…

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How to build megaripples out of sand

Sorting of grains by steady winds produces rare formations larger than ripples but smaller than dunes. Continue reading

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