SUNSPOT MONITORING – MAY 25, 2021

Here are today’s solar images taken from Al Sadeem Observatory, May 25, 2021.

The sky was mostly clear with light breeze which provided good transparency and seeing at the time these images were taken. 

Solar activity eased a bit to low levels over the past 24 hours. AR2824 (Modified Zurich/Mcintosh sunspot configuration: Cso/beta) exhibited some decay on its tiny spots on its intermediate and trailer sections while maintaining its large leader spot and produced multiple B-class solar enhancements only. Meanwhile, AR2825 (Axx/alpha) disintegrated further, barely visible in white-light imagery, and was inactive. The other growing bipolar sunspot group that emerged yesterday has been recently designated as AR2826 (Cro/beta). The latest sunspot number (based on visual count and Wolf number calculation) is 45.

Enhanced plages associated with the upper-mentioned sunspot groups, few faint small quiescent prominences at the limbs, and some short stable mound filaments mostly along the extreme southern hemisphere were the other noteworthy solar features distinctively captured in H-alpha imagery.

Space weather agencies* forecast solar activity to be at low levels with chances of solar flares of mostly B-class to C-class intensity, mainly from AR2824 in the next few 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. 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 (5:20 PM – 5:40 PM, May 25, 2021, from NCM Al Wathba Station):

Average Temperature: 45.87°C

Average Humidity: 7.0%

Average Wind Speed and Direction: 5.03 kph from SW

Average Cloud Cover: 0%

Average Air Pressure: 992.93 hPa

Average Solar Radiation: 191.33 W/m^2

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