SIDC ursigram

:Issued: 2024 May 09 1259 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 40509
GEOALERT BRU130
UGEOA 30512 40509 1259/ 9930/ 
13092 20092 30092 
99999
PLAIN

Solar Active Regions and flaring: The solar flaring activity was at very
high levels with several M-class flares and two X-class flares during the
last 24 hours. The strongest reported flare was GOES X2.3 flare which
peaked at 09:13 UTC on May 09, produced by NOAA Active Region (AR) 3664.
During the flare, source region (AR 3664) of the flare had beta-gamma-delta
configuration of its photospheric magnetic field. The solar flaring
activity is expected to be at high to very high levels over the next 24
hours possibly with several M-class flares and chance for X-class flare.

Coronal mass ejections: A halo coronal mass ejection (CME) was observed on
SOHO/LASCO-C2 images starting around 12:48 UTC on May 08. This halo CME is
associated with a M8.7 flare, which peaked at 12:04 UTC, produced by NOAA
AR 3664. With its source region closer to the central meridian and with a
projected speed of about 446 km/s (as measured by the Cactus tool), the
corresponding ICME is expected to impact the Earth on May 11. A narrow CME
(about 70 deg width) was observed on the NE limb around 19:24 UTC on May
08, which is possibly associated with a filament eruption around 18:30 UTC
(below NOAA AR 3667). It has projected speed of about 440 km/s, as detected
by CACTUS tool. Only a glancing blow, associated with this CME, can be
expected at the Earth late on  May 11 or early on May 12. Another partial
halo CME was first observed on SOHO/LASCO-C2 images around 22:36 UTC on May
08. This CME is associated with a X1.0 flare, which peaked at 21:40 UTC,
produced by NOAA AR 3664. It has a projected width of about 184 deg and a
projected speed of about 552 km/s (as measured by the Cactus tool). With
its source region closer to the central meridian, the corresponding ICME is
expected to impact the Earth late on May 11 or early on May 12. An X2.3
flare occurred with a peak time 09:13 UTC on May 09, produced by NOAA AR
3664. Associted Type II and type IV radio emissions were detected at 09:02
UTC and 09:10 UTC, respectively, during the flaring activity. Corresponding
EUV wave is also observed on SW quadrant of the Sun. The associated CME
will possibly have Earth directed components. Further analysis will be
carried out once thecorresponding LASCO images are availble.

Coronal holes: Two coronal holes (CH) has started to cross the central
meridian on May 8, with one CH spanning 0 N - 40 N (positive polarity) and
another CH spanning 29 S - 43 S (negative polarity). The solar wind from
these coronal holes may enhance the solar wind environment near Earth on
May 11.

Solar wind: Solar wind parameters are transitioning from fast to slow solar
wind regime. The solar wind speed ranged from 490 km/s to 425 km/s. The
North-South component (Bz) ranged between -3 and 3 nT. The interplanetary
magnetic field ranged between 1 nT and 4 nT. We expect a transition to slow
solar wind regime in the next 24 hours.

Geomagnetism: Geomagnetic conditions were globally at quiet (NOAA Kp 1 to
2) and locally at quiet to unsettled conditions (K BEL 1 to 3). Quiet to
unsettled conditions are expected in the next 24 hours.

Proton flux levels: The greater than 10 MeV GOES proton flux was below the
threshold level over the past 24 hours and is expected to remain so for the
next 24 hours.

Electron fluxes at GEO: The greater than 2 MeV electron flux, as measured
by the GOES-16 satellite, was below the threshold level over the past 24
hours and is expected to remain so in the coming 24 hours. The 24h electron
fluence is presently at normal level and is expected to remain so for the
next 24 hours.




TODAY'S ESTIMATED ISN  : 170, BASED ON 18 STATIONS.
UGEOI 30512 40509 1259/ 08/// 
1//// 22273 3008/ 4//// 8//// 9//// 
99999
UGEOR 30512 40509 1259/ ///// ///// 
99999
UMAGF 30503 40509 1004/ 08064 1/011 22222 31112
UMAGF 31523 40509 0000/ 08003 1/008 21222 33311
BT
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