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👩‍🎓 | Sunshine 60 Observatory, Super Moon Total Lunar Eclipse Appreciation Party 5/26


Photo 2018 total lunar eclipse (image) (c) Hiroyuki Narisawa

Sunshine 60 Observatory, Super Moon Total Lunar Eclipse Appreciation Party 5/26

 
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Also, from May 5th to 24th, the second edition of the Sunshine 27 Observatory Astronomical Appreciation Party 60 "Super Moon!
 

At SKY CIRCUS Sunshine 60 Observatory, 3 ... → Continue reading

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Super moon

Super moon(English: supermoon) Isfull moonorNew moonWhen,Elliptical orbitInMonth Of地球By overlapping the closest approaches to, the lunar disk seen from the earth can be seen at its maximum.astronomyFrom an outside perspective, the moon is relative to the earth in the sun-earth-moon system.PerigeeAt the same time as being at (perigee), the moon is against the sun and the earth衝It is the moon when it became (hope).However, the term "supermoon" is not a formal term in astronomy.[3],astrologyIs derived from[4](In astronomy, the perigee full moon[5], The new moon is called Perigee new moon).


The opposite phenomenon, the syzygy of planets at a distant point, is called Micromoon.[6], This term is not as widespread as Supermoon.-

距離

The distance from the earth to the moon varies from about 35 km to 7000 km due to its elliptical orbit.[7][8][9].

The full moon at the perigee is up to 14% larger and 30% brighter than the perigee (2011May 3,NASAObservation by)[10].

the term

The term supermoon was arbitrarily defined by astrologer Richard Nolle in 1979 as follows:

The new moon or full moon closest to the earth (within 90%) in orbit.That is, the earth, the moon, and the sun are aligned in a straight line, and the moon is closest to the earth.[11].

Nolle also argued that the moon in the position of the supermoon causes "geophysical stress". Nolle didn't mention why the 90% figure was chosen[4].

In recent years, it has been said that the full moon or new moon will be reached within one hour before and after the perigee, especially when it comes closest.Extreme Super Moon"(Extreme Supermoon), or"Extra Super Moon(Extra Supermoon), such a full moon can be observed about once every 18 years (extra supermoon).1950After that,1955,1974,1992,2011,2014[5][12]Applicable)[13][14].. In addition,2016In Super Moon, the distance between the moon and the earth will be the closest for the first time in 68 years (the full moon will reach the full moon about two and a half hours after the moon and the earth are closest to each other up to a distance of 35 km.[15]) Does not correspond to the condition of "Extreme Super Moon" within 1 hour before and after the above-mentioned perigee.[16][17].

On the other hand, the term supermoon is not a formal term in astronomy and there is no clear definition.[3]..Similar terms are used instead as "perigee-syzygy" (perigee full / new moon) and "perigee full / new moon".[18].. The "near point" is the point where the moon is closest to the earth in orbit, and the "planetary series" occurs every full moon and new moon with the earth, moon, and sun arranged in a row.Therefore, although Supermoon can be regarded as a combination of the above two, it does not always match exactly.

frequency

The full moon cycle is the period between the aphelion and the sun and the earth, which is about 13.9443 lunar months (about 411.8 days).[Source required]..Therefore, the 14th full moon is the super moon almost every time.However, the full moon approaches the perigee even in just half of the cycle, and the new moon immediately before or after that becomes a supermoon.Therefore, three supermoons occur in each full moon cycle.The full moon supermoon can be observed about once a year due to the above-mentioned full moon cycle, but depending on the positional relationship between the earth and the moon.2014It may be observable several times a year like[19][20].

The difference between 13.9443 and 14 is very close to 1/18, so the supermoon cycle itself fluctuates in 18 full moon cycles (about 251 lunar months, 20.3 years).Therefore, the largest supermoon will be the full moon for about 10 years, and the largest supermoon will be the new moon for the next 10 years.

Impact on tides, coastal erosion, etc.

Impact of the Sun and Moon on the Earth's oceans[21]Is the largest when the moon is a new moon or a full moon[22]..When the moon is near, the tidal force becomes somewhat stronger[23],Perigean spring tideCauses (perigee spring tide).The tidal force follows the inverse cube law, so the force is 19% greater than the average.

"Even when this power is strongest, at most a numberinchIs the effect of degree[24]Some people say.

However, each point (海域) Actual tide heights vary around the world.

Coastal erosion

At the time of super moonCoastal erosionHas been shown to increase[25].Port and Airport Research InstituteResearch results announced by the research team of[26]According to the report, the amount of erosion during supermoon is about 50% higher than that during normal times.By super moonSpring tide Ofhigh tideSince the rank is higher than during normal spring tide, there is a high risk of inundation, due to typhoons, etc.High waves-climaxIf they overlap, erosion will increase and the risk of coastal areas will increase.

This phenomenon is a big thing that Super Moon hasTidal forceAs the seawater level rises at high tideGroundwater levelIt is thought that this is caused by the fact that even when the seawater level drops after that, the sandy beach remains filled with water and is easily scraped by waves.This phenomenon is in Ibaraki prefectureKamisu City OfHasaki coastIt was confirmed by 25 years of topographical observations in Japan.

Grounding?

Supermoon on March 2011, 3 in EnglandThe Solent StraitOf 5 ships inAgroundIt was also said (argued) that it was the cause of[27]..But "There is no evidence to support such a claim[Source required]Some people say.

Relationship with earthquake

2011 yearsTohoku-Pacific Ocean EarthquakeAnd 2004Sumatra offshore earthquakelikeHuge earthquakeIs speculated to be due to a supermoon occurring within a week or two[28][29]Occurs at relatively shallow points within 40 km of depthEarthquakeAbout the moongravitationalByFaultThe greater the force applied to, the more likely it is that an earthquake will occur.theoryExists[30][31]. Also,Tokyo UniversityResearch team is ShiohideScience magazine"Nature Geoscience"(Electronic version dated September 2016, 9), The data of more than 1 earthquakes show that the probability of a large earthquake increases during periods of strong tidal force.[32][33]("Tide #Relationship with earthquakeSee also).

In addition, in the 2011-2012 literature (although it is already old), "There is no evidence of a correlation between supermoon and large earthquakes.[34][35][36]There was also a theory that.

Footnote/Source

[How to use footnotes]
  1. ^ http://sivertimes.com/super-moon-exceptional-brightest-moon-in-the-sky-of-normandy-Monday-November-14/1872
  2. ^ http://astrobob.areavoices.com/2016/11/10/moongazers-delight-biggest-supermoon-in-decades-looms-large-Sunday-night/
  3. ^ a b "Question 2-7) What is "Super Moon"?”(Japanese). National Astronomical Observatory of Japan (NAOJ). 2019th of February 6Browse.
  4. ^ a b Kryptonite for the supermoon | Bad Astronomy | Discover Magazine
  5. ^ a b Extra Super Moon on Sunday night(National Geographic Official Japanese Site: News August 2014, 8)
  6. ^ "Micro Moon – year's smallest full moon – on January 15-16”. EarthSky. As of November 2013, 11オ リ ジ ナ ルMore archives.2016th of February 9Browse.
  7. ^ Meeus, Jean (1997). Mathematical Astronomy Morsels. Richmond, Virginia: Willmann-Bell. P. 15. ISBN 0-943396-51-4 
  8. ^ Plait, Phil (March 2011, 3). “No, the'supermoon' didn't cause the Japanese earthquake". Discover Magazine. 2011th of February 3Browse.
  9. ^ Hawley, John. “Appearance of the Moon Size". Ask a Scientist. Newton. As of February 2015, 2オ リ ジ ナ ル[Broken link]More archive. 14 March 2011; no publication date Viewed.
  10. ^ Phillips, Tony, Dr. (March 2011, 3). “Super Full Moon". Science @ NASA Headline News. NASA. As of June 2012, 5オ リ ジ ナ ル[Broken link]More archives.2013th of February 6Browse.
  11. ^ Nolle, Richard. “Supermoon". Astropro. 14 March 2011; no publication date; modified March 10, 2011 Viewed.
  12. ^ The biggest extra supermoon of the year Let's see the world's supermoon(Karapaia August 2014, 8)
  13. ^ Explanation of Chiezou 2013: Super Moon(Koto Bank)
  14. ^ Extra super moon(Shogakukan"Digital Daijisen』/goo Japanese dictionary)
  15. ^ [Latest] Super Moon Information! 2016 is amazing!(Kiratto. November 2016, 11)
  16. ^ Supermoon for the first time in 68 years, November 11th: Relevance to anxious earthquakes(Newsweek(Japanese version November 2016, 11)
  17. ^ November 11th, the amazing super moon for the first time in 14 years is coming(Huffington post(Japanese version November 2016, 11)
  18. ^ Phillips, Tony (May 2012, 5). “Perigee "Super Moon" On May 5-6". NASA Science News. NASA. 2012th of February 5Browse.
  19. ^ 2014 Super Moon will be held 3 times, and the maximum conditions will be met on August 8th.(Tabetainja July 2014, 7)
  20. ^ The moon approaches the earth, "Super Moon"(CNN May 2014, 7)
  21. ^ Plait, Phil (2008). “Tides, the Earth, the Moon, and why our days are getting longer". Bad astronomy. 14 March 2011; modified March 5, 2011 Viewed.
  22. ^ Sumich, JL (1996). “Animation of spring and neap tides”. NOAA's National Ocean Service. 2013th of February 6Browse.
  23. ^ "Apogee and Perigee of the Moon". Moon Connection. 14 March 2011; no publication date Viewed.
  24. ^ Rice, Tony (May 2012, 5). “Super moon looms Saturday”. WRAL-TV. http://www.wral.com/weather/blogpost/11061791/ 2012th of February 5Browse. 
  25. ^ "50% increase in sandy beach erosion with supermoon Unusual observational research”(Japanese). Nihon Keizai Shimbun (September 2020, 12). 2021th of February 1Browse.
  26. ^ Banno, Masayuki; Kuriyama, Yoshiaki (2020). “Supermoon Drives Beach Morphological Changes in the Swash Zone” (English). Geophysical Research Letters 47 (22): e2020GL089745. two:10.1029 / 2020GL089745. ISSN 1944-8007. https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020GL089745. 
  27. ^ Andy Bloxham (March 2011, 3). “Supermoon blamed for stranding five ships in Solent". Telegraph.co.uk.As of August 2014, 11オ リ ジ ナ ル[Broken link]More archives.2013th of February 6Browse.
  28. ^ Paquette, Mark (March 2011, 3). “Extreme Super (Full) Moon to Cause Chaos?". Astronomy Weather Blog. AccuWeather. 14 March 2011; Viewed.
  29. ^ "Is the Japanese earthquake the latest natural disaster to have been caused by a supermoon?". The Daily Mail (September 2011, 3). 2011th of February 3Browse.
  30. ^ The attraction of the moon triggers an earthquake, published in a US scientific journal by Japanese researchers (Yomiuri Shimbun, October 2004, 10)
  31. ^ American scientific journalScienceElectronic version October 2004, 10,Disaster Prevention Research InstituteSachiko Tanaka et al., RiceUniversity of California, Los Angeles
  32. ^ Will the probability of occurrence increase during a major earthquake or tide?(AFPBB News September 2016, 9)
  33. ^ Is it related to the attraction of the moon or a big earthquake?(December 2016, 9, Nihon Keizai Shimbun)
  34. ^ "Can the position of the Moon affect seismicity?”. The Berkeley Seismological Laboratory (1999). As of August 2012, 8オ リ ジ ナ ル[Broken link]More archives.2011th of February 3Browse.
  35. ^ Fuis, Gary. “Can the position of the moon or the planets affect seismicity?”. US Geological Survey: Earthquake Hazards Program. As of May 2012, 5オ リ ジ ナ ル[Broken link]More archive. 14 March 2011; no publication date Viewed.
  36. ^ Wolchover, Natalie (March 2011, 3). “Will the March 19 "SuperMoon" Trigger Natural Disasters?”. Life's Little Mysteries. 2011th of February 3Browse.

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