Sentences with phrase «magnetic reversals»

The Earth's own precession cycle drives its own 11,500 year magnetic reversal.

There have been several thousand magnetic reversals since the evolution of animal phyla about 600 million years ago, so any creatures that experience seriously detrimental effects when a flip occurs have probably been removed by natural selection.

Second, the fossil record does not show mass extinctions or the accelerated appearance of new species at the times of known magnetic reversals.

In a recent paper published in the Astrophysical Journal (ApJ, 778, 175), Harker and Pevtsov present a detailed case study of one such transient magnetic reversal, observed in NOAA 11429 during the M7.9 flare on 13 March 2012.

Felix has a new book soon to be published that addresses magnetic reversals, another cyclical factor affecting life on Earth.

I'm inclined to suspect the 22 year Hale cycle — and I have thrown it out there before — of solar magnetic reversals.

A magnetic reversal might cause serious ecological mischief.

In this case, you were looking at the magnetic reversals recorded not under the sea but in the layers of rock in a mountain.

What did these magnetic reversals signify?

The team investigated patterns of magnetic reversals — another method to determine age based on knowledge about an era's magnetic orientation — and calibrated the sediments containing the fossils using Geomagnetic Polarity Time Scale (GPTS).

There is a recent study that wonders at the potential for the ~ 22 year Hale cycle of solar magnetic reversal to be the trigger for the 20 to 30 year regimes.

There are variations in this tempo at 20 to 30 years that — throwing this out there — suggest a trigger in the 22 year Hale solar cycle of magnetic reversals.