SIDC Ursigram
3-day-forecast of solar and geomagnetic activity.| Source | SIDC (RWC-Belgium) |
| Frequency | Daily |
| Format | Encoded data (ISES) |
| Mail header | SIDC Ursigram |
| SIDC code | meu |
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Latest issue
:Issued: 2023 Sep 24 1231 UTC :Product: documentation at http://www.sidc.be/products/meu #--------------------------------------------------------------------# # DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC # # (RWC Belgium) # #--------------------------------------------------------------------# SIDC URSIGRAM 30924 SIDC SOLAR BULLETIN 24 Sep 2023, 1230UT SIDC FORECAST SOLAR FLARES : M-class flares expected (probability >=50%) GEOMAGNETISM : Minor storm expected (A>=30 or K=5) SOLAR PROTONS : Quiet PREDICTIONS FOR 24 Sep 2023 10CM FLUX: 176 / AP: 019 PREDICTIONS FOR 25 Sep 2023 10CM FLUX: 176 / AP: 022 PREDICTIONS FOR 26 Sep 2023 10CM FLUX: 176 / AP: 007 Solar Active Regions and flaring: There are twelve active regions visible on the disk. There were two M-class flares in the last 24 hours, the strongest one was an M4.4 from NOAA AR 3435 (beta magnetic field configuration), peaking at 03:28 UTC. The other M-class flare was produced by the new NOAA ARs 3435 (beta magnetic field configuration). NOAA AR 3441 has a beta-gamma magnetic field configuration and NOAA AR 3443 beta- delta, all the other regions have simpler alpha or beta magnetic field configuration. More M-class flares can be expected in the next 24 hours, X-class flares are possible. Coronal mass ejections: No Earth directed CMEs were observed in the last 24 hours. Solar wind: In the last 24 hours, the solar wind speed at the Earth has been around 320 km/s and the interplanetary magnetic field around 5 nT. The CMEs from 20 and 21 September can arrive to the Earth in the next 24 hours, and change the solar wind conditions. Geomagnetism: During the last 24 hours the geomagnetic conditions have been quiet to unsettled, both globally and locally (NOAA KP 3, K_Bel 3). Geomagnetic conditions are expected to reach minor to moderate storm levels if the expected CMEs from 21 and 22 September arrive to the Earth. Proton flux levels: Over the past 24 hours the greater than 10 MeV GOES proton flux was at nominal levels and is expected to remain so over the next 24 hours. Electron fluxes at GEO: The greater than 2 MeV electron flux was above the 1000 pfu, as measured by GOES 16. It has gone down in the last hours, but it may increase over the threshold again in the next 24 hours. The 24 hour electron fluence was at moderate levels, it is expected to stay at those levels for the next 24 hours. TODAY'S ESTIMATED ISN : 189, BASED ON 20 STATIONS. SOLAR INDICES FOR 23 Sep 2023 WOLF NUMBER CATANIA : /// 10CM SOLAR FLUX : 173 AK CHAMBON LA FORET : 014 AK WINGST : 010 ESTIMATED AP : 011 ESTIMATED ISN : 210, BASED ON 17 STATIONS. NOTICEABLE EVENTS SUMMARY DAY BEGIN MAX END LOC XRAY OP 10CM Catania/NOAA RADIO_BURST_TYPES 23 2014 2043 2100 ////// M1.5 ///3436 24 0317 0328 0336 S12E22 M4.4 1N 77/3445 END BT #--------------------------------------------------------------------# # 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
The SIDC ursigram starts with the code SIDC URSIGRAM YMMDD, whereY is the last digit of the year number,
MM is the number of the month,
DD is the day of the month.
A forecast is given on:
the global flare probability,
geomagnetic disturbances,
solar proton events.
PREDICTIONS FOR "today" : 10CM FLUX: xxx / AP: xxx
PREDICTIONS FOR "today+1": 10CM FLUX: xxx / AP: xxx
PREDICTIONS FOR "today+2": 10CM FLUX: xxx / AP: xxx
COMMENT
ESTIMATED ISN : xxx, based on xx stations.
where ISN stands for International Sunspot Number.
OBSERVED SOLAR INDICES FOR THE DAY BEFORE
SUNSPOT INDEX : xxx, the Wolf number observed by Catania
10CM SOLAR FLUX : xxx,
AK CHAMBON LA FORET : xxx,
AK WINGST : xxx,
ESTIMATED AP : xxx,
ESTIMATED ISN : xxx, based on xx stations.
NOTICEABLE EVENTS SUMMARY
DAY BEGIN MAX END LOC XRAY OP 10CM TYPE Catania NOAA NOTE
DAY gives the day-of-the-month.
BEGIN, MAX and END give the UT time of the different phases of the X-ray output of the event.
LOC gives the location of the event in heliographic coordinates.
XRAY gives the GOES X-ray class of the event.
OP lists the optical flare class.
10cm gives the 10.7 cm radioflux output of the event.
TYPE specifies the type of radiobursts observed.
Catania gives the Catania sunspot group number where the event happened.
NOAA is the corresponding NOAA active region number.
NOTE is the header of any other type of information, e.g. if a CME was observed associated with the event.
Check the ISES code book for information on ISES codes.