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Data for Laboratory simulation of earthquake-induced damage in lava dome rocks

Metadata Updated: October 28, 2023

We performed laboratory time-dependent creep and stress-oscillation earthquake simulations in uniaxial loading in compression and tension on four blocks of porphyritic dacite collected from pyroclastic deposits of Mt. Fugen, of the Unzen-dake volcanic complex in Japan (referred to as ‘Unzen volcano’). Experiments were carried out in the Experimental Volcanology and Geothermal Research Laboratory at the University of Liverpool. Loading experiments were carried out in a 100 kN Instron 8800 uniaxial press at room temperature using both compression tests, and Brazilian disk tests to provide the indirect tensile strength (hereafter referred to as tensile strength/tension tests). Load was recorded by an Instron Dynacell 2527 load cell at 100 Hz, which has an accuracy of ±0.1% of the full load capacity (100 kN). Strain is recorded using an Instron LVDT (Linear Variable Differential Transformer) Deflection Sensor, which has an accuracy of ±0.00001 mm or ±0.05% of the measured displacement, whichever is the largest. For the compression tests, cylindrical specimens with a 20-mm diameter were cored and then cut to a length of 40 mm to form cylinders with a 2:1 length:diameter ratio. The cylinders were axially compressed between two parallel plates in the loading frame during testing. For the Brazilian tests, cylindrical specimens with a 40-mm diameter were cored and then cut to a length of 20 mm to form disks with a 2:1 diameter:length ratio. The disks were diametrically compressed between two parallel plates in the loading frame to induce tensional stresses in the orthogonal direction. The specimen dimensions and loading frame setup follow American Society for Testing and Material (ASTM) standards for unconfined (uniaxial) compression and Brazil tensile strength testing (ASTM Standard D7012 (ASTM, 2014) and ASTM Standard D3967 (ASTM, 2016), respectively). Following preparation, specimens were oven dried at 60°C for 24 hours and then placed into a vacuum chamber for one week prior to mechanical experiments.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date May 31, 2023
Metadata Updated Date October 28, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date May 31, 2023
Metadata Updated Date October 28, 2023
Publisher U.S. Geological Survey
Identifier USGS:642aef5bd34ee8d4add03bd2
Data Last Modified 20230531
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id 25bc4f83-58df-4ee7-965b-f71bffd23f17
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial 130.28069,32.72606,130.37338,32.7942
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash 91f7d2eac99f40d790b7bb89776fee24c2cda970e3ec224ca92423dbb9b35ab3
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": 130.28069, 32.72606, 130.28069, 32.7942, 130.37338, 32.7942, 130.37338, 32.72606, 130.28069, 32.72606}

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