SUNSPOT MONITORING – JULY 31, 2020

SUNSPOT MONITORING – JULY 31, 2020

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Here are today’s solar images taken from Al Sadeem Observatory, July 31, 2020.

The sky was mostly clear with intermittent moderate breeze which provided good transparency but average seeing at the time these images were taken.

Both visible unipolar sunspot groups AR2767 (Modified Zurich/Mcintosh sunspot configuration: Axx/alpha) and AR2768 (Axx/alpha) exhibited slightly shrinkage on their respective primary spot structure. Both have remained stable and inactive with no significant flaring activity recorded over the past 24 hours. The latest sunspot number (based on visual count and Wolf number calculation) is 22. An eruption of a huge prominence at the southeastern limb (more than 100,000 km tall), small enhanced plages associated with AR2767 and AR2768, and a mound quiescent filament recently rotated into Earth-view from the northeastern limb were distinctively captured in H-alpha imagery.

Space weather agencies* forecast solar activity to remain at very low levels with chances of weak X-ray fluxes or flares up to B-class intensity. Close monitoring is being conducted by numerous space weather agencies for any significant development.

Equipment used are Skywatcher 120mm refractor telescope with Baader filter and unmodified Canon EOS 1D Mark IV DSLR camera for visible imagery. For H-alpha imagery, the equipment used are Lunt 60mm H-alpha solar telescope, and QHYCCD290III mono camera; all mounted on Skywatcher EQ6 pro mount Pre-processing of visible solar images was performed in PIPP, stacking in Autostakkert, slight wavelet adjustments in Registax 6, and post-processing in Adobe Photoshop CC.

*TECHNICAL REPORTS COURTESY OF SOLAR INFLUENCE DATA CENTER (SIDC), NOAA-SPACE WEATHER PREDICTION CENTER (NOAA-SWPC)

Weather Data (5:40 PM – 6:00 PM, July 31, 2020, from NCM Al Wathba Station):

Average Temperature: 40.8°C

Average Humidity: 31.5%

Average Wind Speed and Direction: 28.8 kph from NNW

Average Cloud Cover: 10%

Average Air Pressure: 985.45 hPa

Average Solar Radiation: 136.5 W/m^2

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