No sunspot monitoring post was issued yesterday, February 24, 2021, due to unfavorable weather conditions prevailed on those dates.
Here are today’s solar images taken from Al Sadeem Observatory, February 25, 2021.
The sky was partly cloudy with intermittent moderate to fresh breeze which provided average to poor transparency and seeing at the time these images were taken.
AR2804 (Modified Zurich/Mcintosh sunspot configuration: Dsi/beta) had its structure doubled in size with further growth of its sunspots in all sections, and was the source of mainly B-class solar flares throughout the monitoring period. On the other hand, AR2805 (Axx/alpha) experienced significant structural decay and was generally inactive over the past 48 hours. Another small region of pores has popped out at the Sun’s southern hemisphere (encircled). The latest sunspot number (based on visual count and Wolf number calculation) is 28.
Other noteworthy solar features featured were some small quiescent and huge eruptive prominences (mostly at the SW limbs) at the limbs, as well enhanced plages associated with the upper-mentioned active regions, as distinctively captured in H-alpha imagery.
Space weather agencies* forecast solar activity to be at low levels with chances of solar flares of up to B-class (possibly up to C-class) intensity, mainly from AR2804. 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 QHYCCD 290III 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 (4:40 PM – 5:10 PM, February 25, 2021, from NCM Al Wathba Station):
Average Temperature: 31.13°C
Average Humidity: 29%
Average Wind Speed and Direction: 23.63 kph from NNW
Average Cloud Cover: 70%
Average Air Pressure: 1000.0 hPa
Average Solar Radiation: 183.0 W/m^2