Japan Geoscience Union Meeting 2023

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Poster

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[O-06] Poster presentations by senior high school students

Sun. May 21, 2023 1:45 PM - 3:15 PM Poster (Exhibition Hall 8, Makuhari Messe)

convener:Tatsuhiko Hara(International Institute of Seismology and Earthquake Engineering, Building Research Institute), Katsuyoshi Michibayashi(Department of Earth and Planetary Sciences, Nagoya University), Miwa Kuri(Japan Meteorological Agency), Keiko Konya(Japan Agency for Marine-Earth Science and Technology)

On-site poster schedule (2023/5/21 13:45-15:15)

1:45 PM - 3:15 PM

[O06-P57] Depth measurement of sunspots by the Wilson effect

*Momoe Ogisu1, Yuka Ohkubo1, Seiyu Tanahasi1, Miki Okumura1, Hitomi Igawa1 (1. Ichinomiya High School)

Keywords:sun, sunspots, Wilson effect


The Wilson effect is a phenomenon in which the darkest part of a sunspot appears concave when the sunspot approaches the solar periphery. We hypothesized that there is a positive correlation between sunspot size and sunspot depth, and measured sunspot size on the image processing software Makali`i using date from the National Astronomical Observatory of Japan (NAOJ). We then calculated the sunspot depth due to the Wilson effect in Excel and discussed it. However, there was no expected correlation, and 28 sunspots yielded a depth of approximately 530 +- 380 km.