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 Feb 03 1230 UTC :Product: documentation at http://www.sidc.be/products/meu #--------------------------------------------------------------------# # DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC # # (RWC Belgium) # #--------------------------------------------------------------------# SIDC URSIGRAM 30203 SIDC SOLAR BULLETIN 03 Feb 2023, 1230UT SIDC FORECAST (valid from 1230UT, 03 Feb 2023 until 05 Feb 2023) SOLAR FLARES : C-class flares expected, (probability >=50%) GEOMAGNETISM : Quiet (A<20 and K<4) SOLAR PROTONS : Quiet PREDICTIONS FOR 03 Feb 2023 10CM FLUX: 139 / AP: 007 PREDICTIONS FOR 04 Feb 2023 10CM FLUX: 137 / AP: 007 PREDICTIONS FOR 05 Feb 2023 10CM FLUX: 137 / AP: 007 COMMENT: There are four active regions visible on the solar disc, all of them with simple alpha or beta magnetic field configuration. Solar flaring activity was at low levels over the past 24 hours, with several C-class flares detected. The strongest one was a C3.9 flare from a region behind the west limb, peaking at 02:49 UTC. Further C class flaring is expected. No Earth-directed coronal mass ejections (CMEs) were detected in the available coronagraph imagery over the past 24 hours. A partial halo CME was first seen at 00:48 UTC by LASCO C2, erupting towards the NE. This event is backsided and will not affect the Earth. The greater than 10 MeV proton flux was at nominal levels in the past 24 hours and is expected to remain so in the next 24 hours. The greater than 2 MeV electron flux has been below the 1000 pfu threshold and is expected to remain so. The 24h electron fluence was at normal levels and is expected to remain so over the next 24 hours. A positive polarity equatorial coronal hole is crossing central meridian, its associated high speed stream will arrive to the Earth in about 3 days. The solar wind speed at L1 is at 350 km/s with an interplanetary magnetic field around 8 nT, with mostly negative polarity (oriented towards the Sun). Similar conditions can be expected for the next 24 hours. Geomagnetic conditions were quiet locally and unsettled at planetary levels (K_Dourbes up to 2 and Kp up to 3). Similar conditions expected for the next 24 hours. TODAY'S ESTIMATED ISN : 068, BASED ON 06 STATIONS. SOLAR INDICES FOR 02 Feb 2023 WOLF NUMBER CATANIA : 090 10CM SOLAR FLUX : 135 AK CHAMBON LA FORET : 008 AK WINGST : 006 ESTIMATED AP : 005 ESTIMATED ISN : 070, BASED ON 16 STATIONS. NOTICEABLE EVENTS SUMMARY DAY BEGIN MAX END LOC XRAY OP 10CM Catania/NOAA RADIO_BURST_TYPES NONE 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.