File:Pumice from the 13 August 2021 explosive eruption of Fukutoku-Okanoba Volcano (Bonin Islands, western Pacific Ocean) 11.jpg
Original file (2,402 × 1,984 pixels, file size: 3.18 MB, MIME type: image/jpeg)
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Summary
[edit]DescriptionPumice from the 13 August 2021 explosive eruption of Fukutoku-Okanoba Volcano (Bonin Islands, western Pacific Ocean) 11.jpg |
English: Pumice is a felsic to intermediate to alkaline, extrusive igneous rock. It has a frothy texture, meaning it has abundant tiny holes that were originally gas bubbles in lava. Most pumice samples are so low-density - so light-weight for their size - that they float in water. The solid parts of pumice are usually glass-rich.
This pumice sample comes from a summer 2021 explosive eruption of the Fukutoku-Okanoba Volcano in the western Pacific Ocean. Fukutoku-Okanoba is a usually-submerged volcano located in the southern Bonin Islands, south of Japan. During and after eruptions, one or more ephemerals islands are present. Fukutoku-Okanoba is a subduction zone volcano in the Izu-Bonin Volcanic Arc. In this area, the Pacific Plate is subducting westward under the Philippines Plate. This particular eruption occurred during the morning of 13 August 2021. Large quantities of pumice were generated. The pumice floated in the Pacific Ocean for months and washed ashore at various Japanese islands in fall 2021. Collection site: beach on Yoron Island, Amami Islands, between Japan and Taiwan Eruption video at: en.wikipedia.org/wiki/Fukutoku-Okanoba#/media/File:Fukuto... Info at: en.wikipedia.org/wiki/Fukutoku-Okanoba and en.wikipedia.org/wiki/Bonin_Islands and en.wikipedia.org/wiki/Izu–Ogasawara_Trench and en.wikipedia.org/wiki/Izu–Bonin–Mariana_Arc |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/51998061802/ |
Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/51998061802. It was reviewed on 12 April 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
12 April 2022
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 12:44, 12 April 2022 | 2,402 × 1,984 (3.18 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/51998061802/ with UploadWizard |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/11 |
ISO speed rating | 80 |
Date and time of data generation | 13:58, 30 March 2022 |
Lens focal length | 11.614 mm |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 18.0 (Macintosh) |
File change date and time | 03:06, 12 April 2022 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 13:58, 30 March 2022 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 6.90625 |
APEX exposure bias | −0.66666666666667 |
Maximum land aperture | 4 APEX (f/4) |
Metering mode | Pattern |
Flash | Flash fired, compulsory flash firing, red-eye reduction mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.905349794 |
Focal plane Y resolution | 16,483.516483516 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Portrait |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 23:06, 11 April 2022 |
Unique ID of original document | 6645DA627A2FC54973C9521C2B882E7E |