Pohon kuno mengungkap badai matahari abad pertengahan dari tahun 1200 M

Kamis, 14 Mei 2026

Dilaporkan oleh AI

Para peneliti telah menemukan bukti adanya peristiwa proton matahari yang kuat yang menghantam Bumi sekitar tahun 1200 M dengan menganalisis lonjakan karbon-14 pada pohon-pohon kuno Jepang serta mencocokkannya dengan catatan abad pertengahan mengenai aurora merah.

Penelitian yang dipimpin oleh para ilmuwan di Okinawa Institute of Science and Technology ini mengidentifikasi peristiwa sub-ekstrem tersebut terjadi antara musim dingin tahun 1200 M hingga musim semi tahun 1201 M. Studi ini menggabungkan pengukuran karbon-14 yang sangat presisi dari pohon asunaro yang terkubur di Prefektur Aomori dengan catatan sejarah, termasuk deskripsi cahaya merah di langit utara dari sebuah buku harian Jepang serta laporan serupa dari Tiongkok.

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