体重が一番軽く出るのはペルーのワスカラン山頂/enのソースを表示

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{{豆知識
|番号=0037
|投稿者=まめち編集部
|本文=The weakest gravity on the Earth's surface is on the summit of Huascarán in Peru (6,768 m, about 9°S), about 9.764 m/s², and the strongest is near the surface of the Arctic Ocean, about 9.834 m/s². The two ends differ by about 0.7%: a person who reads 80.0 kg in Sapporo would read about 79.7 kg on Huascarán and about 80.2 kg on the Arctic Ocean.
|なぜ=Near the surface of the Arctic Ocean you are close to the rotation axis, so there is almost no centrifugal force, and you are not on the equatorial bulge, so you are closer to the centre. The summit of Huascarán is the opposite: near the equator, where centrifugal force is large, and high up, far from the centre.
|ジャンル=科学・自然
|ファクト度=A
|ファクト度の根拠=The values were confirmed in the paper itself (primary). Not S because the paper calls them "candidate" locations: they are model estimates computed from terrain and satellite data
|ネタ度=S
|ネタ度の根拠=There is a pinpointed place on Earth where you weigh the least
|便利度=該当なし
|便利度の根拠=A fact worth knowing for its own sake
|検証ステータス=根拠あり
|根拠1URL=https://ddfe.curtin.edu.au/gravitymodels/GGMplus/hirt2013_ultrahighres_gravity.pdf
|根拠1要約=Manuscript of Hirt et al. (2013, Geophysical Research Letters). Candidate minimum: Huascarán summit, 9.76392 m/s²; maximum: Arctic Sea, 9.83366 m/s²; a range of about 0.7%, about 40% larger than the 0.5% of standard models. Relative to Sapporo, 80.0 kg becomes 79.67 kg / 80.24 kg (checked by calculation)
|根拠1格付け=一次
|根拠2URL=https://www.curtin.edu.au/news/media-release/gravity-variations-much-bigger-than-previously-thought/
|根拠2要約=Curtin University media release (2013). Earth's gravitational pull is smallest on the top of Huascarán in the Andes and largest near the North Pole
|根拠2格付け=二次
|補足=The maximum is not at the North Pole itself but at the surface of the Arctic Ocean at 86.71°N (the paper's value). From latitude alone both poles would be about 9.832 m/s², but the South Pole sits on ice about 2,800 m high, which alone lowers it to about 9.823 (checked by calculation). This is a different record from Chimborazo, the summit farthest from the Earth's centre ([[Special:MyLanguage/地球の中心から一番遠い山頂はエベレストでなくチンボラソ|#0014]]). Huascarán comes out lowest because it is near the equator and high up (the paper does not give detailed reasons). The English Wikipedia article "Gravity of Earth" gives the same figures.
|検証日時=2026-10-29
|検証方式=AI＋人
|本家既出チェック=本家に既出
|本家の該当ページ=https://en.wikipedia.org/wiki/Gravity_of_Earth
|派生元=富士山頂では体重計の数字が約0.1％軽く出る
}}