Keanakākoʻi Tephra unit D, Kīlauea Volcano, Hawaii: sample details, grain size, and grain shape data for 100 tephra samples

A total of 100 samples were collected from two proximal sections of Keanakākoʻi, Tephra unit D deposits. Samples were analyzed on Microtrac CAMSIZER® P4 and X2 instruments for grain size and shape data in the USGS Hawaiian Volcano Observatory (HVO) tephra lab. Data release includes sample descriptions, half phi grain size distributions, and statistical output from DECOLOG deconvolution modeling of grain size distributions. Grain size is reported using the sieve compatible Xcmin parameter (CAMSIZER® manual, 2020). Data of 2D shape parameter means of sphericity, Krumbein roundness and compactness of samples as well as for half phi grain size bins at 4, 3, 2, 1, 0, and -1 phi are also included. Please refer to associated publication Schmith and Swanson (2023) for detailed methodology information and data interpretations.
 
Acknowledgments
I greatly appreciate Hawaiʻi Volcanoes National Park for providing a permit to collect samples for this study. All trademarks and trade names are the property of their respective owners. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. This work was supported by the Additional Supplemental Appropriations for Disaster Relief Act of 2019 (P.L. 116-20) following the eruption of Kīlauea Volcano in 2018.
 
References Cited
 
CAMSIZER® Manual Evaluation Software CAMSIZER® P4, 2020, Microtrac Retch Gmbh, Haan, Germany, v. 2, 174 p.
 
Schmith J. and Swanson D. A., 2023, Complex styles of phreatomagmatic explosions at Kīlauea Volcano, Hawaii, controlled by magma structure, Frontiers in Earth Science, V. 11, https://doi.org/10.3389/feart.2023.1153288