Fig. 1: Thickness, possible modes of arrival, and componentry of Hunga volcanic ash found at the Eastern Lau Spreading Center—Valu Fa Ridge hydrothermal vents.
From: Deep seafloor hydrothermal vent communities buried by volcanic ash from the 2022 Hunga eruption
a Componentry (colored vertical bars) of grains clearly discernable under stereomicroscope (>125 μm) and grain size distribution (red line) of ash collected from Tow Cam. b Scanning electron micrograph of bulk ash sample from Tow Cam. Particle color corresponds to examples of the particle categories selected for in componentry: older volcanic (orange), fresh volcanic (blue), foraminifera (green). c Plume imagery at 4:46 UTC on January 15, 2022 provided by Himawari from the Data Integration and Analysis System (DIAS) by Japan Agency for Marine-Earth Science and Technology (JAMSTEC). Predicted submarine flow routes based on ash deposit thickness, and particle properties. d Bathymetry of sample sites made with the Generic Mapping Tools v681, their corresponding distance from the Hunga volcano, and ash deposit thickness. Vent field abbreviations are as follows: KM Kilo Moana, TC Tow Cam, TM Tahi Moana, TuM Tu’i Malila, Mar Mariner.
