This Week’s Black Supermoon
Friday August 30, 2019
Cristal M Clark
If you look at your calendar, you’ll most likely see that this Friday marks a new moon, but this Friday’s moon is much more than just a new moon.
The new moon occurs Aug. 30, at 6:37 a.m. EDT (10:37 GMT), just a few hours before the moon reaches perigee, the closest point in its orbit to Earth. When the moon reaches perigee on or around the same day as a full moon, it is commonly referred to as a “supermoon.” That’s because it appears slightly larger and brighter than usual due to its closer proximity to Earth. However, the “super” new moon for all you moon gazers won’t be visible in the night sky. Because this new moon is the second new moon in a single calendar month, it will also be a “Black Moon” in some parts of the world. While the Western Hemisphere had a Black Moon on July 31, the Eastern Hemisphere will have theirs on Aug. 30.
The sun and moon both influence the height of the tides and this Black Moon on Friday will cause a perigean spring tide because both the sun and the moon will on the same side. And that River that is going to flow backwards? That would be the River Severn in the U.K. known as the “Severn Bore.” A tidal bore is when a wave travels up a river in the “wrong” direction, against the current. Here, the tidal range is the second highest in the world and it’s common for a wave to flow backwards. However, only just after a supermoon is it possible to see up to and possibly over a 10-meter wave and it could cause flooding in Gloucestershire.
Not all of us will see the new Super Moon this week, our next chance however is right around the corner when a “secret supermoon” happens September 28 that will lead to an even bigger tidal bore.
Until then, happy moon gazing.
Cristal M Clark