Author Topic: [BAA-ebulletin 00983] High Solar Activity - observations requested  (Read 63 times)

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Rick

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[BAA-ebulletin 00983] High Solar Activity - observations requested
(c) 2017 British Astronomical Association    http://www.britastro.org/

Solar Cycle 24 is giving a late show with a sudden outburst of activity in white light and H-alpha.  Active Regions 2673 and 2674 are both impressive on the disk with AR2673 rapidly developing and releasing several solar flares including an M1.5 flare today between 1511 and 1533 UT.

Observations are requested during the next few days including images and drawings.

As always take care when observing the Sun and only use the appropriateequipment.  Never look at the Sun with the naked eye or through an unfiltered telescope.

"Solar activity is high.  Region NOAA 12673 produced an M1.2 flare at 05:36 UT today along with several C-class events.  This region is rapidly growing and is now beta-gamma-delta class. Further M-class evnets are likely and an X-class flare is possible.  NOAA 12673, S10 W11 (X= 180,Y= 281). Position as of September 4, 2017 at 15:30 UT."

Lyn Smith
Director
BAA Solar Section

Rick

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[BAA-ebulletin 00984] Extremely High Solar Activity
« Reply #1 on: Sep 07, 2017, 11:04:21 »
[BAA-ebulletin 00984] Extremely High Solar Activity
(c) 2017 British Astronomical Association    http://www.britastro.org/

The below bulletin has just been received.  Two X class flares took place today with the potential for more as Active Region 2673 approaches the western solar limb.  Observations and images are requested.  Please send to solar at britastro org

It is likely that Coronal Mass Ejections accompanied today's two major flare events and the possibility of aurora over he weekend is also likely.  Any aurora reports to sandra-b at hotmail co uk

"Solar activity is extreme. Region NOAA 12673 produced two X-class flares  since the last report: an X2.2 at 08:57 UT and an X9.3 at 11:53 UT today. The region remains beta-gamma-delta class, with a large field gradient and shear between the positive and negative delta spots. It has also produced several M-class events. Further X-class activity is likely.

The potential for very large flare events still exists.

NOAA 12673, S09 W40 (X= 607,Y=-239). Beta-gamma-delta region. Position as of September 6, 2017 at 16:00 UT."

Lyn Smith
Director
BAA Solar Section