現在の H₂S 濃度：40ppm
現在の SO₂ 濃度：40ppm
Current H₂S concentration: 40 ppm
Current SO₂ concentration: 40 ppm
caldera Research Center
Caldera Research Center
An independent volcano research institute led by Yoshiaki Sera.
Socials
© Yoshiaki Sera 2025
工事中
現在の H₂S 濃度：40ppm
現在の SO₂ 濃度：40ppm
Current H₂S concentration: 40 ppm
Current SO₂ concentration: 40 ppm
Caldera Research Center
An independent volcano research institute led by Yoshiaki Sera.
© Yoshiaki Sera 2025