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Supermoon - Megatsunami Myth Debunked by Two Astronomers

21 January 2019 10:22 WIB

TEMPO.CO, Jakarta - The Supermoon expected to take place on January 21, 2019, will potentially cause the sea levels to rise across seven Indonesian coastlines. This lunar phenomenon is often linked to large-scale megatsunamis such as the 2004 Aceh and 2011 Japan tsunami.

An astronomer from the Langit Selatan Bandung community, Avivah Yamani, said that the effect of a supermoon is mainly the higher high tides compared to normal full moons.

“The high-tide difference is about 5 centimeters higher compared to full moons that happen monthly,” said Avivah on Sunday, January 20, 2019.

What makes the supermoon special is the fact that it is in its closest distance to the earth, called perigee. The one to take place in January 22 will see the earth and moon separated by a 357,342-kilometer gap, which will eventually create high-tides.

“The fact is that moon’s effect during a perigee is still considered to be too weak,” said Avivah Yamani who graduated from ITB’s astronomy faculty.

Read also: South Coast of Yogyakarta Not Significantly Impacted by Supermoon

His statement contrasts those voiced by astrologers that claim the supermoon phenomenon causes natural disasters. They claim that past tsunamis that struck Aceh in 2004 and Japan in 2011 were linked to a supermoon occurrence.

According to the Meteorology, Climatology and Geophysics Agency (BMKG) astrophysics and astronomy researcher Rulman Nugraha, astrologers claim the Aceh tsunami happened just two weeks prior to the supermoon. A supermoon was also visible 8 days after the devastating Japanese earthquake in 2011.

Rukman explained that the claims by these astrologers are baseless and can be proven by the data that shows the supermoon linked to the Aceh tsunami was at its furthest distance calculated at 402,046 kilometers from earth while the Japanese tsunami saw the moon 396,132 kilometers from earth.

“The statement linking the two phenomena (supermoon and earthquake) is completely baseless,” said the BMKG astrophysics and astronomy researcher.

ANWAR SISWADI



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