#anticrepuscular rays

【昨日の出会い】

大和高田での写真展からの帰り路 富雄川を北上してると西も東も面白い空♫ 東の空は反薄明光線(裏後光)。 2024年9月10日撮影

From Earth Science Picture of the Day; May 14, 2018:

Anticrepuscular Rays Observed Over Santos, Brazil Photographer: Meire Ruiz Santos; Summary Authors: Meire Ruiz Santos, Jim Foster

The photo above shows a beautiful display of anticrepuscular rays as viewed from the city of Santos in the Sao Paulo state of Brazil. It was taken near sunset, at 6:40 on February 8, 2018 -- the camera is facing east. The darker blue colored lanes are shadows, areas where clouds on the opposite horizon have effectively blocked the Sun's rays. Because there happens to be ample dust and aerosols in the air, the rays of sunlight and shadow project across the entire sky. Perspective makes it seem as though they converge at the antisolar point.

Photo Details: Camera: Canon PowerShot SX40 HS; Exposure Time: 0.017s (1/60); Aperture: ƒ/2.7; ISO equivalent: 320; Focal Length: 4.3mm; Software: Picasa.

Santos, Brazil Coordinates: -23.9561, -46.3264

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From Earth Science Picture of the Day; January 2, 2017:

Volcan Acatenango's Shadow and Anticrepuscular Rays Photographer: David Rojas; Summary Authors: David Rojas, Jim Foster

Pictured above is the shadow of the cone of Volcan Acatenango projected upon distant volcanoes as well as Lake Atitlán, at center. Acatenango, a stratovolcano, stands 13,045 ft (3,976 m) above sea level, the third highest summit in Central America. Also captured on this sunrise photo are anticrepuscular rays, which appear to converge at the tip of volcano's shadow. The Sun is coming up directly behind me. The rays result from clouds gathered on the eastern horizon, in the vicinity of the rising Sun. They're actually parallel to each other as they stretch across the sky but perspective makes it seem as though they converge.

In addition, note the darkened band just above the horizon. This is the Earth's shadow sinking in the western sky. The pinkish strip atop the shadow, referred to as the Belt of Venus, is reddened sunlight scattered off the top-most portion of the shadow band. Photographers in the foreground at bottom right are appreciating this attention-getting sunrise from a slightly lower location. Photo taken on November 20, 2016.

Acatenango volcano, Guatemala Coordinates: 14.500833, -90.875833

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