GEOALERT SIDC
3-day-forecast of solar and geomagnetic activity.Source | SIDC (RWC-Belgium) |
Frequency | Daily |
Format | Encoded data (ISES) |
Mail header | GEOALERT SIDC |
SIDC code | xut |
Latest issue
:Issued: 2024 Mar 28 1233 UTC :Product: documentation at http://www.sidc.be/products/xut #--------------------------------------------------------------------# # GEOALERT message from the SIDC (RWC-Belgium) # #--------------------------------------------------------------------# GEOALERT BRU088 UGEOA 30512 40328 1233/ 9930/ 12282 20282 30282 99999 PLAIN PREDICTIONS FOR 28 Mar 2024 10CM FLUX: 170 / AP: 006 PREDICTIONS FOR 29 Mar 2024 10CM FLUX: 166 / AP: 005 PREDICTIONS FOR 30 Mar 2024 10CM FLUX: 155 / AP: 008 Solar Active Regions and flaring: The solar flaring activity was moderate with one M-class flare recorded. The largest flare of the period was an M7.1 flare with peak time 06:29 UTC March 28. This flare originated from Catania region 22 (NOAA AR 3615), which is the largest and most complex region on disk (Beta-Gamma-Delta) but has begun to decay slightly. This region also produced much of the C-class flaring activity. Catania region 30 and 32 (NOAA ARs 3623 and 3622) decayed into plage regions The remaining regions on disk are simple and were either stable or in decay. The solar flaring activity is expected to be at moderate levels over the next 24 hours with C-class flares expected, M-class flares likely and a low probability for an X-class flare. Coronal mass ejections: No Earth directed Coronal Mass Ejections (CMEs) have been detected in the available coronagraph imagery. Coronal holes: Two small positive polarity coronal holes one near the equator and one in the southern hemisphere began to cross the central meridian on March 27. Solar wind: The solar wind speed gradually decreased from values around 500 km/s to around 420 km/s due to the waning influence of the ICME which arrived on March 24. The interplanetary magnetic field ranged between 0 and 5 nT. The Bz component reached a minimum value of -2 nT. The interplanetary magnetic field phi angle was predominantly in the positive sector. The solar wind speed is expected to reflect slow solar wind conditions on March 28 and 29, enhancements due to the solar wind associated with the positive coronal holes may be expected from March 30. Geomagnetism: Geomagnetic conditions were at quiet levels (NOAA Kp 2 and Local K Bel 2). Geomagnetic conditions are expected to be at quiet to unsettled levels on March 28 to March 30. Proton flux levels: Over the past 24 hours the greater than 10 MeV GOES proton flux was still slightly enhanced but remained below the 10pfu threshold. The proton flux is expected to continue to decrease and remain below 10 Mev threshold over the next 24 hours. Electron fluxes at GEO: The greater than 2 MeV electron flux remained below the 1000 pfu threshold as measured by GOES 16. It is expected to exceed this threshold over the next days. The 24-hour electron fluence was at nominal levels. The electron fluence is expected to increase to normal to moderate levels over the next day. TODAY'S ESTIMATED ISN : 097, BASED ON 14 STATIONS. 99999 UGEOI 30512 40328 1233/ 27/// 1//// 21750 3006/ 4//// 8//// 9//// 99999 NOTICEABLE EVENTS SUMMARY DAY BEGIN MAX END LOC XRAY OP 10CM Catania/NOAA RADIO_BURST_TYPES 28 0616 0629 0636 S16W55 M7.1 1N 22/3615 END UGEOR 30512 40328 1233/ ///// ///// 99999 USSPS 81202 27021 13032 83009 44716 2/801 89014 40818 21410 94001 10521 01202 93001 13311 01202 90002 22009 11303 86003 30914 2/801 84096 34213 57641 UMAGF 30503 40328 1004/ 27068 1/008 22111 31121 UMAGF 31523 40328 0000/ 27008 1/006 23122 31111 #--------------------------------------------------------------------# # 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 Geoalert message starts with the code GEOALERT BRUXXX, where xxx is the day-of-the-year number.Besides the ISES codes like UGEOA, UGEOI, UGEOR and USSPS, this message contains the following information:
PLAIN
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
99999
This gives the predicted 10.7 cm radioflux and the predicted Ap index for 3 days starting on the date of the message
NOTICEABLE EVENTS SUMMARY
DAY BEGIN MAX END LOC XRAY OP 10CM TYPE Catania NOAA NOTE
This is the header of a table that lists all major events.
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.