Here are today’s solar images taken from Al Sadeem Observatory, April 4, 2019.
The sky was mostly clear with intermittent light to moderate winds which provided average seeing and transparency at the time these images were taken.
The lone (barely) visible sunspot group AR2737 (Modifed Zurich/Mcintosh sunspot configuration: Bxo/beta) has decayed its structure significantly and was inactive; did not produce any significant flaring activity over the past 24 hours. The latest sunspot number (based on visual count and Wolf number calculation) is 13. The associated plage of decaying AR2737 at the central part of the Sun’s disk, as well as few tiny filaments at the far northern hemisphere, and several eruptive prominences at the limbs 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 ranging up to B-class intensity, mainly from AR2737. The extent of the frequency and intensity of the Sun’s activity will highly depend on the magnetic flux fluctuations happening in the visible ARs in the coming days. 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 and Lunt H-alpha solar telescope and ZWO120MM CMOS camera for H-alpha imagery, mounted on Skywatcher EQ6 Pro. 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 (4:55PM – 5:15PM, April 4, 2019):
Average Temperature: 38.4°C
Average Humidity: 11%
Average Wind Speed and Direction: 19.4 kph from N
Average Cloud Cover: 25%
Average Air Pressure: 998.35 hpa
Average Solar Radiation: 211.29 W/m^2
Average UV Radiation: 319.5 µW/m^2 (low)