[SAS] Re: possible aurora action August 4th

From: Nick Monkman <nmonkman@xxxxxxxxx>
To: SAS <sas@xxxxxxxxxxxxx>
Date: Thu, 3 Aug 2017 23:22:11 -0700

Awesome...thanks Phyllis! There's also a nifty sunspot (relative to the
utterly blank sun we've been seeing...) swinging into view that I'm going
to try to observe this weekend.

On Thu, Aug 3, 2017 at 6:24 PM, Eide, Phyllis <eide@xxxxxxx> wrote:

FYI….. (assuming we can see anything thru the smoke in the air!!)
Phyllis

*GEOMAGNETIC STORM WATCH (G2-CLASS): *NOAA forecasters say there is an
80% (not a typo!) chance of polar geomagnetic storms on Aug. 4th when a
solar wind stream is expected to envelop Earth's magnetic field. The wind
is flowing from a canyon-shaped hole in the sun's atmosphere, shown here in
an extreme ultraviolet image from NASA's Solar Dynamics Observatory:

<http://spaceweather.com/images2017/03aug17/latest_2048_211193171.jpg?PHPSESSID=2aqiq9r0l0cq9r1r5voe9qf8r4>
This is a coronal hole (CH), a region where the sun's magnetic field peels
back and allows gaseous material to escape. The resulting solar wind is
traveling toward us faster than ~600 km/s. Geomagnetic storm levels could
reach *G2*
<http://spaceweather.com/glossary/g2.jpg?PHPSESSID=2aqiq9r0l0cq9r1r5voe9qf8r4>-category
(moderately strong) during the late hours of Aug. 4th, subsiding to *G1*
<http://spaceweather.com/glossary/g1.jpg?PHPSESSID=2aqiq9r0l0cq9r1r5voe9qf8r4>-category
(minor) on Aug. 5th. High-latitude sky watchers should be alert for auroras
mixed with waxing gibbous moonlight.

*http://spaceweather.com/* ;<http://spaceweather.com/>

References:
- [SAS] possible aurora action August 4th
  - From: Eide, Phyllis

[SAS] Re: possible aurora action August 4th

Other related posts: