Think your GPS is reliable?

 

EQUATORIAL PLASMA BUBBLES DISRUPT GPS:  Think your GPS is reliable? Not when the sky turns to Swiss cheese. A new study reveals how equatorial plasma bubbles—giant holes in Earth's ionosphere—disrupted GPS signals across the Americas during a recent geomagnetic storm. Full story @ Spaceweather.com.

Above: Equatorial plasma bubbles (inset) are disrupting signals from GPS satellites.