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Geophysics News

ESA's Swarm satellites probe weakening of Earth's magnetic shield

In an area stretching from Africa to South America, Earth’s magnetic field is gradually weakening. This strange behavior (the South Atlantic Anomaly) has geophysicists puzzled and is causing technical disturbances in satellites orbiting Earth.

Huge Australian asteroid impact ‘Curtains for many life species'

Canberra - Geophysicists have discovered evidence of what may be the world’s largest asteroid impact in central Australia. The impact zone from what would have been a huge meteorite stretches over 400 kilometers.

Earth's magnetic field could flip within a human lifetime

Berkeley - Could the world turn upside down — magnetically speaking that is? The answer is yes according to a new joint study by researchers from Europe and America — and a flip of Earth’s magnetic field could occur within our lifetimes.

Indonesian quakes: Pacific Rim gets physical

According to the United States Geological Survey, Sumatra has had 42 earthquakes since the 8.4 quake on the 12th of September. Some of the quakes have been felt as on Java. It’s an earthquake prone area, but Indonesia has a special place in geophysics.

Earth, the inflatable planet; just add some hot rocks

Most of North America would be sea floor if not for the effect of hot rock expanding the crust. The continents really do float, according to this study. It’s a pretty odd picture of North America in particular. New Orleans would be 739 metres under wate

Geophysics' major achievement - proof of magma current under Tucson, Arizona.

Seismic data has shown that the inner Earth is layered, density altering markedly at three different depths. In 2003, Yale geophysicists proposed a layer of molten rock at the upper layer, 410 kilometers, (about 250 miles) extending around the Earth
 

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Some of the research team: Left to right  Biaggio Giaccio  Gianluca Sotilli  Courtney Sprain and Seb...
Some of the research team: Left to right, Biaggio Giaccio, Gianluca Sotilli, Courtney Sprain and Sebastien Nomade sitting next to an outcrop in the Sulmona basin of the Apennines that contains the Matuyama-Brunhes magnetic reversal. A layer of volcanic ash interbedded with the lake sediments can be seen above their heads.
Paul Renne, UC Berkeley
ANU s Dr Andrew Glikson examining a sample of suevite  a rock with partially melted material formed ...
ANU's Dr Andrew Glikson examining a sample of suevite, a rock with partially melted material formed during a meteorite impact.
ANU Supplied

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