MM#003 Major Flare Watch

Max Millennium Chief Observer mmchiefobserver at gmail.com
Thu Apr 18 06:24:54 MDT 2024


Dear Collaborators,

Solar activity is at a moderate level. Target region NOAA 13639
was stable in terms of spot area and number of spots since the
last message, remaining classified as a beta-gamma-delta/E-type
sunspot group. This region has decreased significantly in both
flaring frequency and peak flaring magnitude, producing only a
C4.3 flare in the period (17-Apr-2024 at 20:51 UT). In contrast,
newly numbered NOAA 13645 produced ten C-class and two M-class
flares (M1.6 on 17-Apr-2024 at 21:55 UT and M1.3 on 18-Apr-2024
at 07:17 UT). This region was classified as a beta-gamma/C-type
sunspot group at the start of the UT day, but now appears to be
a D-type group with a potential delta spot. The largest flare
in the period was an M2.2 on 18-Apr-2024 at 02:32 UT from NOAA
13638 (a beta/C-type group) that is located close to NOAA 13645
(and also NOAA 13637). The MM#003 Major Flare Watch continues,
but the target switches to NOAA 13645. Additional low M-class
flares are expected over the following 24-hour period, with a
good chance for a >M5 flare.

The position of NOAA 13645 on 18-Apr-2024 at 12:30 UT is:

S10E17 , ( -278", -82" )

See http://www.SolarMonitor.org for images and
http://solar.physics.montana.edu/max_millennium/ops/observing.shtml
for a description of the current Max Millennium Observing Plan.

Regards,

Shaun Bloomfield (Northumbria University)


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