Tottori earthquakes and Daisen volcano: Effects of fluids, slab melting and hot mantle upwelling

- Magmatic fluids under Daisen volcano affected large Tottori earthquakes.
- Upwelling flow occurs in the upper mantle above the old Pacific slab.
- The PHS slab is heated from below and side by the hot mantle upwelling.
- Daisen adakite magmas were affected by the PHS slab melting.