Tuesday, June 3, 2025

Observations at GONG/TD are impacted by Calima.



Observations from GONG/TD (Canary Islands) are impacted by Calima. This may appear as a slight blurring of H-alpha and other images. Calima is a meteorological phenomenon, when the prevailing winds blow dust from the Sahara desert towards the Canary Islands and farther in the Atlantic Ocean. Images from the NOAA's GOES 19 satellite taken on 24 May 2025 show the dust tail extending from the West cost of Africa all the way to North America. Calima usually happens in Summer, and each episode may last 3-5 days.

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