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 | tot |
Latest issue
:Issued: 2025 Jul 08 1230 UTC :Product: documentation at http://www.sidc.be/products/tot #--------------------------------------------------------------------# # DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC # #--------------------------------------------------------------------# SIDC URSIGRAM 50708 SIDC SOLAR BULLETIN 08 Jul 2025, 1230UT SIDC FORECAST SOLAR FLARES : C-class flares expected, (probability >=50%) GEOMAGNETISM : Active conditions expected (A>=20 or K=4) SOLAR PROTONS : Quiet PREDICTIONS FOR 08 Jul 2025 10CM FLUX: 121 / AP: 010 PREDICTIONS FOR 09 Jul 2025 10CM FLUX: 119 / AP: 010 PREDICTIONS FOR 10 Jul 2025 10CM FLUX: 123 / AP: 008 Solar Active Regions and flaring: Solar flaring activity was moderate over the past 24 hours, with 1 M-class flare identified. The largest flare was a M2.4 flare (SIDC Flare 4813) peaking on July 08 at 04:17 UTC, which erupted behind the Suns east limb. A total of 7 numbered sunspot groups were identified on the disk over the past 24 hours. All regions on disk have either an Alpha or Beta magnetic configuration. Solar flaring activity is expected to be low over the next 24 hours, with C-class flares very likely and a chance for M-class flares. Coronal mass ejections: No Earth-directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraph images. Coronal holes: Returning SIDC Coronal Hole 104 (mid-latitude coronal hole with a positive polarity) started to cross the central meridian on July 08. The high-speed stream (HSS) from this coronal hole is expected to enhance the solar wind near Earth on July 11. Solar wind: In the past 24 hours solar wind conditions at Earth were disturbed, due to the waning influence of a high-speed stream (HSS), associated with SIDC coronal hole 111. The total interplanetary magnetic field ranged from 6 nT to a peak of 10 nT, with the Bz component reaching a minimum of -8 nT. The solar wind speed ranged from 496 km/s to 606 km/s. The phi-angle was mainly in the negative sector (directed towards the Sun) with periods in the positive sector. The solar wind conditions are expected to remain disturbed in the next 24 hours due to the ongoing influence of the HSS. Geomagnetism: The geomagnetic conditions over the past 24 hours reached active conditions globally (Kp 4) and were unsettled locally (K BEL 3). Quiet to active conditions are expected for the next 24 hours. Proton flux levels: Over the past 24 hours, the greater than 10 MeV GOES proton flux was at background levels and is expected to remain so over the next days. Electron fluxes at GEO: The greater than 2 MeV electron flux, as measured by the GOES-18 and GOES-19 satellite, remained below the 1000 pfu threshold over the past 24 hours. The electron flux is expected to remain below the threshold level over the next 24 hours. The 24-hour electron fluence was at normal levels and is expected to remain at normal levels over the next 24 hours. TODAY'S ESTIMATED ISN : 088, BASED ON 11 STATIONS. 99999 SOLAR INDICES FOR 07 Jul 2025 WOLF NUMBER CATANIA : 140 10CM SOLAR FLUX : 118 AK CHAMBON LA FORET : 030 AK WINGST : 024 ESTIMATED AP : 028 ESTIMATED ISN : 095, BASED ON 19 STATIONS. NOTICEABLE EVENTS SUMMARY DAY BEGIN MAX END LOC XRAY OP 10CM Catania/NOAA RADIO_BURST_TYPES 08 0342 0417 0437 ////// M2.4 /////// END UMAGF 30503 50708 1004/ 07065 1/030 23334 33333 UMAGF 31523 50708 0000/ 07003 1/024 25433 33443 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.
Besides the ISES codes like UMAGF, UCOSE and USSPS,
this message contains a forecast 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.