January 15th, 2013 at 10:06 pm by under Bill's Blog, Weather

   The moon is setting in the far west right now. If you look at the crescent moon, you’ll notice the rest of the moon is faintly illuminated. That faint light is “Earthshine”.  Earthshine (there’s even a song about it) is light from the sun that is reflected off the Earth and back to the moon. It is most pronounced in January and February because of the higher amount of snow cover in the Northern Hemisphere (which set a record for areal extent for December this year (despite the lack of snow here).

ADD:  Pictures of 9 unique waterfalls

11 Responses to “Earthshine”

  1. Nathan says:

    Bill, my dad and I noticed that earlier! Very cool :)

  2. Jack says:

    Hey BILL, Check Out THIS CUE, Very FITTING for This THREAD !!!! ENJOY SPIN :
    It’s Called….EARTHSHINE…

    1. Brian says:

      Awesome song from my favorite band! Neal Peart, drummer and lyricist for Rush is a known (fellow) weather geek… Neil Peart (from the Rush Profiled! CD): “I’m a weather fanatic – I really love weather, and I watch the weather and look for a good weatherman.”

      1. Skot says:

        Brian Bill is married. He Love Her Long time.

    2. k-man says:

      as soon as i saw this post about “earthshine,” this tune was the first thing that came to mind. great song…one of my favorite rush tunes. neil peart is the man!!

  3. Skot says:

    Bill I highly Doubt that North America has much to do will the reflection. Just that the Moon is so much closer to the sun or sunset rather.

    1. Skot says:

      * Snow wise

  4. kevin. w says:


    1. Irish coffee says:


  5. Mike M. says:

    Earthshine is measured.

    Earthshine is a measure of the earth’s albedo, which becomes a proxy for cloudiness. More clouds=more sunlight reflected away from earth=cooler temps. Earth shine can vary dramatically from year to year.

  6. Cyndy Carlson says:

    Bill, I saw that last night and thought it very cool. I didn’t realize it had a name.

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