Thursday, December 23, 2010

Winter Solstice

banjir di Silverado Canyon,
Orange County, California
photo courtesy MSNBC

Tanggal 21 December kemaren, tepat dimulainya 'Winter Season' di 'Northern Hemisphere'..negara negara di Amerika Serikat, Canada dan Eropa yang mengalami mulainya musim dingin bersamaan. Winter Solstice ini terjadi ketika 'Bumi' berada pada garis paling jauh dari Matahari, sehingga 'siang hari' menjadi lebih pendek dari malam hari.
Di Amerika Serikat, Winter kali ini, bahkan sebelum Winter resmi dimulai, ditandai dengan salju lebat di beberapa negara bagian di Pantai Timur (East Coast),..sedangkan di West Coast terutama di California bagian selatan, hujan deras tanpa henti menyebabkan banjir dan tanah longsor atau lebih tepat lumpur longsor, akibat tanah yang bercampur hujan.

 The winter solstice occurs exactly when the Earth's axial tilt is farthest away from the sun at its maximum of 23° 26'. Though the winter solstice lasts only a moment in time, the term is also a turning point to midwinter or the first day of winter to refer to the day on which it occurs. More evident to those in high latitudes, this occurs on the shortest day and longest night, when the sun's daily maximum position in the sky is the lowest.
(Source:Wilkipedia)

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