UFO or Rare Sky Hole phenomenon photographed over Stockton CA - May 14, 2014

The sky appeared to be opening up over Stockton California as multiple photographers captured this amazing event on May 9, 2014.

This strange cloud formation in the sky of Stockton is a so-called fallstreak hole, also known as a hole punch cloud.

Such holes are formed when the water temperature in the clouds is below freezing but the water has not frozen yet due to the lack of ice nucleation particles. When ice crystals do form it will set off a domino effect, due to the Bergeron process, causing the water droplets around the crystals to evaporate: this leaves a large, often circular, hole in the cloud.

Because of their rarity and unusual appearance, fallstreak holes are often mistaken for or attributed to unidentified flying objects.



  1. i seen this there was no cloud formationis the hole that you can see isthe only cloud out there no one got a picture of the streak of white that seemed to go all the way to livermore and the black smoke around the hole at the end of it


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