SIDC ursigram

:Issued: 2024 May 17 1231 UTC
:Product: documentation at http://www.sidc.be/products/uge
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# DAILY BULLETIN ON SOLAR AND GEOMAGNETIC ACTIVITY from the SIDC     #
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SIDC URSIGRAM 40517
GEOALERT BRU138
UGEOA 30512 40517 1231/ 9930/ 
12172 20172 30172 
99999
PLAIN

Solar Active Regions and flaring: Solar flaring activity was low during the
past 24 hours. The brightest flare was a C8 emitted today at 01:46 UTC by
NOAA Active Region (AR) 3679 (magnetic configuration Beta-Gamma). The same
AR produced most of the C-class flaring activity of the past 24 hours,
namely another four flares. The large NOAA AR 3685 (magnetic configuration
Beta-Gamma) produced two C-class flares and NOAA AR 3674 (magnetic
configuration Beta, Catania sunspot group 3) one. For the next 24 hours,
NOAA AR 3679 is expected to continue to produce C-class flares with a
chance of an M-class flare. NOAA AR 3685 is expected to increase its
activity, likely produce M-class flares, with a small chance of an X-class
flare.

Coronal mass ejections: No Earth-directed Coronal Mass Ejections (CME) were
observed in the last 24 hours.

Solar wind: The Solar Wind conditions were gradually returning to a slow
wind regime, as the effects from the arrival of the Coronal Mass Ejection
(CME) yesterday are waning. The SW speed decreased from 470 km/s to 400
km/s and the total interplanetary magnetic field (Bt) dropped from 10 nT to
5 nT. The North-South magnetic component (Bz) fluctuated between -7 and 10
nT when still under the influence of the CME. The interplanetary magnetic
field phi angle was directed away and towards the Sun in almost equal
measure during the past 24 hours. A CME is expected to arrive in the next
24 hours and cause a significant effect.

Geomagnetism: In the past 24 hours the global geomagnetic conditions
dropped from minor storm levels (NOAA Kp 5- between 12:00-15:00 UTC) to
quiet levels (as low as NOAA Kp 1+). During the same period the local
conditions dropped from the active level (K BEL 4 between 12:00-18:00 UTC),
to the quite level (K BEL 2). The expected arrival of a Coronal Mass
Ejection (CME) is predicted to increase the geomagnetic levels to active or
minor storm in the next 24 hours.

Proton flux levels: The greater than 10 MeV proton flux, as measured by the
GOES-18 satellite, dropped below the 10 pfu threshold level during the last
24 hours. It is likely that it will continue its gradual drop in the next
24 hours, however, there is a small chance of a new proton event and an
increase in flux above the alert level.

Electron fluxes at GEO: The greater than 2 MeV electron flux, as measured
by the GOES-16 satellite, was at very low levels during the last 24 hours
and is expected to to remain so during the next 24 hours. The 24h electron
fluence was at low levels during the past 24 hours and is expected to
remain at these levels for the following 24 hours.




TODAY'S ESTIMATED ISN  : 180, BASED ON 17 STATIONS.
UGEOI 30512 40517 1231/ 16/// 
1//// 22070 3025/ 4//// 8//// 9//// 
99999
UGEOR 30512 40517 1231/ ///// ///// 
99999
USSPS 31405 17080 19332 02007 35020 2/803 03012 30413 21312 05001 12318
01203 06028 21808 24515 07001 12713 01203 08008 33523 14415 09006 26412
21307 10016 26614 25406 11005 27807 2/802 93004 46521 14404 95003 43619
21302 96001 31608 1/801
UMAGF 30503 40517 1004/ 16064 1/032 25443 32112
UMAGF 31523 40517 0000/ 16003 1/025 23354 35431
BT
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