A supermoon will occur this weekend, visible on both the nights of Saturday, June 22 and Sunday, June 23. Astrologers are warning of natural disasters and astronomers say that the tides will shift as a result of the Supermoon.

The June 2013 supermoon will be the largest supermoon this year. It will also be the Summer Solstice, marking the beginning of summer.

Astrologer Richard Nolle coined the term supermoon, also known as a perigree full moon. The supermoon will appear up to 14 percent bigger and 30 percent brighter than a normal moon. The wolves will be howling and the sky bright during the Supermoon, when the lunar orbit is closest to the Earth.

Some are warning of natural disasters during the Supermoon. While astronomers say the theory has been debunked, many natural disasters have occurred during supermoons in the past.

The Indonesia tsunami in 2004 and, more recently, the Japanese earthquake and tsunami from 2011 occurred immediately before a supermoon. Hurricaine Katrina and the 1992 earthquake in Turkey have also been linked to supermoons.

The astronomer James Garvin of NASA said that "the combination of the moon being at its closest to Earth in its orbit, and being in its 'full moon' configuration (relative to the Earth and sun), should not affect the internal energy balance of the Earth since there are lunar tides every day.

Garvin added,"The Earth has stored a tremendous amount of internal energy within its thin outer shell or crust, and the small differences in the tidal forces exerted by the moon (and sun) are not enough to fundamentally overcome the much larger forces within the planet due to convection.

"Nonetheless, these supermoon times remind us of the effect of our 'Africa-sized' nearest neighbor on our lives, affecting ocean tides and contributing to many cultural aspects of our lives."

The moon's distance to Earth varies constantly, tracing an ellipsis around the planet as it travels. A supermoon occurs when a full moon is closest to Earth.

The moon lines up with Earth and the sun at a specific point called the lunar perigee, and a super-bright supermoon lights up the night sky.

There will be another Supermoon in July, but it will not be as bright. This weekend's Supermoon will mark the closest the full moon will be to Earth until August 2014.

At 7:32 AM EDT Sunday, the moon will be exactly full. It will reach the closest point to the Earth 22 minutes before that. On both Saturday and Sunday evening, the moon will be particularly bright. It is easiest to see when it is closest to the horizon at moonrise or moonset.