AURORAL ACTIVITY The geomagnetic field is expected to be at mostly quiet levels on May 16-19 with a chance for an
isolated unsettled to active period early on May 17. GEOMAGNETIC
ACTIVITY PAGE
One year ago: ALASKAN AURORA BOREALIS on March 1, 2011
The Northern Lights under perfectly clear skies at the Yukon River in Alaska. See the photos fromCIRCLE, ALASKA