SIDC Weekly Bulletin
Review of past solar and geomagnetic activity.Source | SIDC (RWC-Belgium) |
Frequency | Weekly |
Format | Plain text |
Mail header | SIDC Weekly Bulletin |
SIDC code | bul |
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:Issued: 2022 May 10 1515 UTC :Product: documentation at http://www.sidc.be/products/bul #--------------------------------------------------------------------# # SIDC Weekly bulletin on Solar and Geomagnetic activity # #--------------------------------------------------------------------# WEEK 1114 from 2022 May 02 SOLAR ACTIVITY --------------- Solar flaring activity ranged between low and high levels over the week. Nearly all the flaring activity was associated with two regions: NOAA AR 3004 and NOAA AR 3006. NOAA AR 3006 produced five M-flares and an X flare between May 03 and May 05. The X1.1 flare occurred on May 04, peaking at 13:25 UT. The X-flare and two of the M-flares originated from beyond the east limb before the region had rotated onto the solar disk and was numbered. NOAA AR 3004 began to emerge on May 02, near the central meridian and developed quickly, producing four M-class flares between May 04 and May 05. Towards the end of the week, the flaring activity decreased to low levels with both regions continuing to produce C-class flares. On May 08 a new region beyond the east limb produced a C6 flare and was later numbered as NOAA AR 3007. There were multiple filaments observed on disk over the week. A dimming was observed on May 03 near the central meridian. An associated faint, slow Coronal Mass Ejections (CME) seen in LASCO-C2 on May 03 from 18:00 to the north east was considered to possibly have an Earth directed component and was predicted to impact Earth on May 07. On May 06, a filament eruption in the north east quadrant, seen in SDO/AIA 304 from 20:00 UT, was linked to a broad faint CME to the north east seen in LASCO C2 from 21:24 UT. This was not initially considered Earth directed but then considered to possibly have a glancing blow at Earth on the second half of May 10. No other Earth-directed Coronal Mass Ejections (CMEs) were detected in the available coronagraph imagery. The greater than 10 MeV proton flux was at nominal. The greater than 2MeV electron flux oscillated around the 1000 pfu threshold for most of the week. The 24h electron fluence was at normal to moderate levels. GEOMAGNETIC ACTIVITY --------------------- At the start of the week the solar wind speed was near 500 km/s and gradually decreased over the week and reflected a slow solar wind regime. The total magnetic field magnitude fluctuated around 5 nT during the week, increasing slightly to values near 9 nT on May 08. The interplanetary magnetic field phi angle was predominantly in the negative sector (directed towards the Sun). Geomagnetic conditions were quiet for the whole week with just a few local unsettled intervals (NOAA Kp 0-2, Local K Bel 0-3). --------------------------------------------------------------------------- DAILY INDICES DATE RC EISN 10CM Ak BKG M X 2022 May 02 038 035 112 007 B5.9 0 0 2022 May 03 130 082 114 007 B5.8 1 1 2022 May 04 115 077 130 008 B9.6 5 0 2022 May 05 094 074 120 004 B8.7 2 0 2022 May 06 /// 074 119 006 B6.9 0 0 2022 May 07 /// 062 118 002 B5.3 0 0 2022 May 08 /// 076 119 008 B4.8 0 0 --------------------------------------------------------------------------- # RC : Sunspot index (Wolf Number) from Catania Observatory (Italy) # EISN : Estimated International Sunspot Number # 10cm : 10.7 cm radioflux (DRAO, Canada) # Ak : Ak Index Wingst (Germany) # BKG : Background GOES X-ray level (NOAA, USA) # M,X : Number of X-ray flares in M and X class, see below (NOAA, USA) --------------------------------------------------------------------------- NOTICEABLE EVENTS SUMMARY DAY BEGIN MAX END LOC XRAY OP 10CM Catania/NOAA RADIO_BURST_TYPES 03 0734 0753 0801 ////// M1.3 /////// III/1 03 1309 1325 1331 S16E05 X1.1 SF 96/3004 04 0008 0019 0025 ////// M5.3 /////// 04 0845 0859 0910 S16W09 M5.7 1B 32 96/3004 04 1625 1632 1640 S16W11 M1.1 1N 96/3004 04 1940 1948 2003 ////// M1.5 ///3006 04 2009 2027 2036 ////// M1.6 96/3004 05 1308 1316 1322 S16W24 M2.2 SN 96/3004 05 1402 1410 1414 S29E64 M2.7 SF 99/3006 #--------------------------------------------------------------------# # Solar Influences Data analysis Center - RWC Belgium # # Royal Observatory of Belgium # # # # Website http://www.sidc.be. # # E-mail sidc-support@oma.be # # To unsubscribe http://www.sidc.be/registration/unsub.php # # # # Legal notices: # # - Intellectual Property Rights: # # http://www.astro.oma.be/common/internet/en/data-policy-en.pdf # # - Liability Disclaimer: # # http://www.astro.oma.be/common/internet/en/disclaimer-en.pdf # # - Use and processing of your personal information: # # http://www.astro.oma.be/common/internet/en/privacy-policy-en.pdf # #--------------------------------------------------------------------#
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This report is sent once a week, typically on a monday.The weekly bulletin gives an overview of solar and geomagnetic activity of the past week and includes a noticeable solar events list.
Check the ISES code book for information on ISES codes.