Earlier this week,a band of flaming orange light poured down the face of Yosemite National Park's most iconic cliffside.
It wasn't an impromptu eruption of magma (you'd be more likely to spot one of thosein Yellowstone).It wasn't hot at all.It was the latest example of the annual phenomenon known as a "firefall" — a sublime trick of winter light that mixes melting snow with the setting sun.
Yosemite's firefall occurs almost every year around mid-February to the end of the month,澳门金沙官方游戏Live Science previously reported,when the snowpack atop the park'sEl Capitanrock 澳门金莎官方游戏formation begins to melt and flow down the cliffside,澳门金莎官方游戏forming a seasonal waterfall known as Horsetail Fall.
As the meltwater plunges 1,500 feet (457 meters) to the ground,the setting sun throws its light against the falls.If the sky is clear and the sun is positioned precisely in the western sky,thatsetting sunlightpaints the the water with fiery orange,yellow and pink light.
It's a precise twilight magic trick that lasts only about 10 minutes a day under optimal conditions — "even some haze or minor cloudiness can greatly diminish or eliminate the effect," the National Park Servicewrote on its website.Still,that hasn't stopped thousands of tourists and park-going paparazzi from showing up every year in hopes of catching a glimpse.
As the myriad photos and videos posted to social media attest,Yosemite's firefall is a privilege to behold — but it's not a guarantee.When snowfall in the park is weak,因为它是在2012年,visitors might be disappointed to find a "firedrizzle”。
Yosemite Firefall 2019pic.twitter.com/Y24Hf2qx18— Kenneth (@KennethKLopez) February 21,2019
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Originally published on澳门金沙官方游戏.