Blue Twilight Arch
Taken by Peter Lowenstein on November 6, 2015 @
Mutare, Zimbabwe
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Camera Used: Panasonic DMC-TZ60
Exposure Time: 40/10
Aperture: f/3.3
ISO: 400
Date Taken: 2015:11:06 23:00:10
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Details:
On 03 November the remnants of a strong cold front from South Africa brought cloud, rain and clean air to Mutare in Zimbabwe. For the past two days there have been clear skies with excellent visibility and the sunsets have been followed by displays of brightly colored twilight arches caused by lingering aerosols from the April eruption of Calbuco volcano. The distribution of these must be very patchy as the twilight arches produced on two consecutive days have been completely different. This evening, 06 November, the colors were predominantly blue as shown in the first photograph and mosaic. Yesterday evening, 05 November, they were yellow, orange, magenta and pale purple as shown in the second mosaic and more typical of those which have been seen from time to time over the past few months. On both days the sun set at 18.00 hrs LT and the 4 photographs in each mosaic were taken 10, 16, 22 and 36 minutes later using a Panasonic Lumix DMC-TZ60 compact camera in sunset auto and night sky modes. The reason for the big difference is, I suspect, because the aerosols have in just 24 hours become more diffuse and/or partially moved on? Current OMI SO2 Column 5 KM-24-Hour Composite Images are available from the NOAA Satellite and Information Service at htttp://satepsanone.nesdis.noaa.gov/pub/OMI/OMISO2/index.html. The fourth image is a screen capture showing the latest distribution over Southern Africa and confirms that SO2 has been passing over Eastern Zimbabwe.
Photographer's website:
No URL provided.
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