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

Archive

Latest issue

:Issued: 2024 Jun 17 1610 UTC
:Product: documentation at http://www.sidc.be/products/bul
#--------------------------------------------------------------------#
# SIDC Weekly bulletin on Solar and Geomagnetic activity             #
#--------------------------------------------------------------------#
WEEK 1224 from 2024 Jun 10

Solar Active Regions (ARs) and flares
---------------
Solar flaring activity was high on June 10, when an X1.5 flare from NOAA AR
3697 was recorded. For the rest of the week, the solar flaring activity was
mostly at moderate levels, with few M-class flares and multiple C-class
flares. There was a total of 15 numbered active regions observed on the
visible solar disk over the week. The most complex ones were NOAA AR 3697
and NOAA AR 3712. NOAA AR 3697 (beta-gamma-delta) rotated beyond the west
limb early during the week, but still exhibited flaring activity. NOAA AR
3712 evolved to beta-gamma-delta on June 15 and produced C- and M-class
flares.

Coronal mass ejections
---------------------
Multiple Coronal Mass Ejections (CMEs) were recorded during the last week.
Selected events are listed below. Two partial halo CMEs, associated with
flaring activity from NOAA 3697 were observed in SOHO/LASCO-C2 around 11:00
UTC and around 18:36 UTC respectively on June 10. The source region was
behind the west limb and no impact on Earth was recorded for both cases. A
partial halo CME was observed in SOHO/LASCO-C2 around 23:36 UTC on June 10,
associated with a prominence eruption in the south-west quadrant. No impact
on Earth was recorded. An asymmetric halo CME was first detected around
22:43 on June 11 in SOHO/LASCO-C2. A Type II radio burst reported at 22:51
UTC on June 11, was most likely associated with this CME. No impact on
Earth was recorded. A faint partial halo CME was first detected around
23:32 UTC on June 12 in SOHO/LASCO-C2. It was most probably associated with
the M1.2 flare from NOAA AR 3711. The shock from the ICME arrival at Earth
was recorded around 11:05 UTC on June 15. A Coronal Mass Ejection (CME) was
observed in SOHO/LASCO-C2 data around 12:11 UTC on June 15. It was most
likely associated with a filament eruption observed in SDO/AIA 304 data
around 11:20 UTC on June 15, in the south-east quadrant.

Coronal Holes
---------------------
Three coronal holes have crossed the central meridian during the past week.
The first was an east-west elongated, negative polarity coronal hole in the
south hemisphere that fully crossed the central meridian on June 11. The
second was a small, negative polarity coronal hole in the southern
hemisphere that crossed the central meridian on June 10. The third was a
positive polarity coronal hole that crossed the central meridian on June
13.

Proton flux levels
---------------------
The greater than 10 MeV GOES proton flux was above the 10 pfu threshold
until June 09. It remained close to the threshold between 03:00 UTC on June
12 and 12:00 UTC on June 13, when it started to decrease again. It returned
to background levels late on June 15.

Electron fluxes at GEO
---------------------
Over the past week, the greater than 2 MeV electron flux as measured by
GOES 16 and GOES 18 remained below the 1000 pfu threshold. The 24-hour
electron fluence was at nominal levels throughout the week.

Solar wind
---------------------
Two shocks were detected in the solar wind data during the last week. The
first one, associated with the CME observed on June 08, was detected around
16:50 UTC on June 10. The interplanetary magnetic field jumped from 6 nT to
15 nT, the solar wind speed jumped from 345 km/s to 440 km/s and increased
up to 480 km/s. The solar wind density at the shock increased from 4 ppcc
to 15 ppcc. The second shock, associated with the CME recorded on June 12,
was detected around 11:05 on June 15. The interplanetary magnetic field
jumped from 6 nT to 14 nT, the solar wind speed jumped from 360 km/s to 437
km/s and increased up to 460 km/s. The solar wind density at the shock
increased from 3.8 ppcc to 9.9 ppcc.

Geomagnetism
---------------------
Geomagnetic conditions reached globally and locally active levels (NOAA Kp
from 0 to 4+ and K Bel from 0 to 4) in response to the ICME arrival on June
10. Geomagnetic conditions reached globally minor storm levels (NOAA Kp 5+)
and locally active levels (K BEL 4) in response to the ICME arrival on June
15.

---------------------------------------------------------------------------
DAILY INDICES
DATE           RC   EISN  10CM   Ak   BKG    M   X
2024 Jun 10   140    122   178   011   C2.3   5   0   
2024 Jun 11   113    100   165   013   C1.7   0   0   
2024 Jun 12   ///    118   165   005   C1.4   1   0   
2024 Jun 13   ///    149   170   004   C1.4   1   0   
2024 Jun 14   169    157   169   006   C1.7   1   0   
2024 Jun 15   ///    147   171   023   C1.9   1   0   
2024 Jun 16   ///    151   167   018   C1.4   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 
10  0558  0609 0616 ////// M3.3          28/3697      

10  1018  1058 1103 ////// M5.3 F        28/3697      II/2I/2 

10  1320  1329 1335 ////// M1.3 F        28/3697      

10  1811  1840 1918 ////// M9.5          28/3697      II/1I/1I/1    7 

10  0938  1006 1018 ////// M2.2          28/3697      

12  2224  2246 2335 ////// M1.2 N        49/3711      

13  1634  1645 1655 S16E59 M3.2 1N       ///3713      

14  0414  0432 0443 ////// M2.4          51/3712      

15  0600  0627 0643 ////// M1.3          51/3712      

#--------------------------------------------------------------------#
# 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 #
#--------------------------------------------------------------------#

Details

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.