Tides
How does tide occurs? It is due to combination of gravitational pull of the Sun and the moon. Tidal force affects the earth but the most significant effect is tidal bulge of the ocean. The ground only moves only by several centimeters but the sea level can increase up to several feet. Spring tides occur during full moon and new moon. At these phases, the alignment of the moon and the sun sums up their gravitational force, creating large tidal force. Neap tides occur during third quarter and first quarter of moon phases, where the sun and the moon’s gravitational do not sum up, creating small gravitational force.
Supermoon
Have you guys ever heard or seen supermoon? Do you guys know what supermoon is?
Supermoon occurs when the position of the moon is closer to the Earth than it usually is. So, the gravitational force of the moon contributing to tidal force increases dramatically. It appears brighter and closer to the earth. Unfortunately, this magnificent view unfortunately can cause natural disasters to occur.
Some of the natural disasters that might have been caused by supermoon:
The 2011 Japanese earthquake and tsunami were related to supermoon but some people debated about this as some source stated that supermoon did not occur on March 11 2011.
There is an interesting article about supermoon and its relation to natural disaster click here
To Infinity and Beyond 