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Fig. 1 | Progress in Earth and Planetary Science

Fig. 1

From: Climatic reconstruction at the Sannai-Maruyama site between Bond events 4 and 3—implication for the collapse of the society at 4.2 ka event

Fig. 1

a Map of the Japan Sea and the North Pacific around the Japanese Islands, including Honshu and Hokkaido. The paths of the Tsushima, Oyashio, and Kuroshio Currents are indicated. The route of the Kuroshio Current follows Jian et al. (2000). Honshu is the central and largest of the four main islands of Japan while Hokkaido is the second largest. The location of the Toro site (solid square) and Suigetsu lake (open square), central Japan, is also shown. b Locations (solid circle) of the core KT05-7 PC-02 site (41° 00′ N, 140° 46′ E; water depth, 61 m) and the Sannai-Maruyama archeological site (open circle). Bathymetric isolines are at 200 m depth intervals. The location (cross) of the St. 5 site (42° 23′ 59.377″ N; 140° 24′) in Funka Bay is also shown. Sannai-Maruyama was designated a Special National Historical Site in Japan in 2000 (Sannai Maruyama special historical site;, a and b)

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