File:Hailstones (4 July 2010) (Limon, eastern Colorado, USA) 3.jpg
![File:Hailstones (4 July 2010) (Limon, eastern Colorado, USA) 3.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/f/fe/Hailstones_%284_July_2010%29_%28Limon%2C_eastern_Colorado%2C_USA%29_3.jpg/800px-Hailstones_%284_July_2010%29_%28Limon%2C_eastern_Colorado%2C_USA%29_3.jpg?20230224181140)
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Summary
[edit]DescriptionHailstones (4 July 2010) (Limon, eastern Colorado, USA) 3.jpg |
English: Hailstones deposited by a 4 July 2010 storm in Limon, Colorado, USA.
Hailstones are scarce, ephemeral, polycrystalline, concentrically layered, monomineralic rocks of meteoric origin. They are composed of the mineral ice (hydrogen oxide, H2O). Ice has a low melting temperature for a mineral (= 0˚ Celsius/Centrigrade; = 32˚ Fahrenheit; = 273˚ Kelvin). As a result of this, rocks (hailstones, firn, glacial ice) and sedimentary deposits (snow) consisting of ice are ephemeral, except at very high elevations (mountain tops) and in polar to near-polar facies. Hailstones form in many thunderstorms and can reach the land surface before melting. They range in size from about half-a-centimeter to over 20 centimeters (very large hailstones such as: www.flickr.com/photos/75478688@N08/6804952627/in/photostr... and www.flickr.com/photos/74109683@N03/6807753397/in/photostr... are not really hailstones, but are aggregate hailstones, formed by ice cementing many smaller hailstones together). Hailstones form spherical to subspherical to irregularly-shaped masses. The term "cryometeorites" has been applied to hailstones by some people. Considering that they have a meteoric origin, and do not originate from outer space, this term is inappropriate and is rejected here. The most significant hailstone occurrence & hailstone damage I've ever seen was at Limon, Colorado, USA on the evening of 4 July 2010 and the following morning. A relatively small, but intense, storm cell went over the small town of Limon on America's Indepedence Day, resulting in the deposition of a moderately thick layer of small-to-large hailstones in surface depressions. See video taken by Tony Laubach: www.youtube.com/watch?v=w6IRIkNGGR4&feature=related During this event, hailstone size changed over time, resulting in the ~bimodal size distribution shown here. The small hailstones are principally composed of cloudy ice (the cloudiness is produced by a high number of inclusions in the ice - small bubbles of air). Many of the larger hailstones (~1.5 to 2.5 cm in diameter) have noticeable concentricity, consisting of zones of cloudy ice + clear, inclusion-free ice. |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/15148092311/ |
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@N05/15148092311. It was reviewed on 24 February 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
24 February 2023
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current | 18:11, 24 February 2023 | ![]() | 4,000 × 3,000 (4.41 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/15148092311/ with UploadWizard |
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Metadata
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/4.9 |
ISO speed rating | 250 |
Date and time of data generation | 22:37, 4 July 2010 |
Lens focal length | 18.6 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 18:17, 5 September 2014 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 22:37, 4 July 2010 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 4.59375 |
APEX exposure bias | 0 |
Maximum land aperture | 4.59375 APEX (f/4.91) |
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 | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Supported Flashpix version | 1 |
Image width | 4,000 px |
Image height | 3,000 px |
Date metadata was last modified | 14:17, 5 September 2014 |
IIM version | 2 |