Moreover, some floating stones, observed experimentally in 2021 by local researchers, lack pumice’s white hue or extreme porosity.

Researchers from Tokyo Metropolitan University have carried out an unprecedentedly detailed survey of pumice rafts in the aftermath of the 2021 Fukutoku-Oka-no-Ba volcanic eruption in Japan.

Huge rafts of pumice spewed by an undersea volcano have traveled some 1,400 kilometers and started lapping against the shores in southwestern islands of Okinawa and Amami, causing serious effects ...