Tag Archives: SDO

G2 Storm Watch Issued, Aurora Possible June 4, 2016

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Northern Lights Now – The large coronal hole that was responsible for the May 6-8 Mother’s Day G3 aurora storm is pointed toward earth again and has potential to create aurora this weekend. SWPC has posted a G2 storm watch for June 4, with a period of predicted G1 and G2 (KP=5, KP6 respectively) storming late in the UTC day. It is likely this watch will be extended to June 5 tomorrow. This means good aurora conditions are possible on Friday and Saturday evenings – particularly in the southern hemisphere where it is winter and the nights are longer.

The Dark area in center disk is the coronal hole that may produce aurora on June 4
The Dark area in center disk is the coronal hole that may produce aurora on June 4

The initial estimates for the timing of the arrival of the solar wind are often off by several hours, but the current estimates show two periods of G1 storming starting around 1500 GMT, then a period of G2 storming starting in the 2100 GMT timeperiod. This is good timing for European and North American aurora chasers, but NLN is expecting the storm to last long enough that it will be good for the evening of June 5 in New Zealand and Southern Australia. As of June 1, this is the NLN aurora clock for the day covered in the watch period:

NLN auroraCast shows G1 and G2 periods of storming in the final 3 periods of June 4
NLN auroraCast shows G1 and G2 periods of storming in the final 3 periods of June 4

Happy Hunting!

Night Sky May 30, 2016 – Mars, ISS and Aurora

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Northern Lights Now – May 30 will be a great night to go stargazing! There is a slight chance for aurora overnight on May 30/May 31, and Mars will shine brightly red as it is at it’s closest to Earth in 13 years. If you are lucky enough to be in the Northeast united states, there will also be a terrific International Space Station (ISS) pass just after sunset.

Aurora

A coronal hole was directed towards Earth three days ago and the high speed solar wind stream that it generated should be arriving this afternoon. As the high speed winds arrive, they will push on the Earth’s magnetosphere making aurora possible. This is a weak coronal hole, and so it is unlikely to produce a strong light show. Nonetheless, the Space Weather Prediction Center (SWPC) has issued a G1 geomagnetic storm watch indicating KP could exceed 5. Here’s an image of the coronal hole from Thursday.

Coronal hole in AIA 211 from the SDO from 5/26/2016..
Coronal hole in AIA 211 from the SDO from 5/26/2016..

SWPC also publishes a 30-75 minute lead time alert indicating what the KP will be based on data coming from the DSCOVR satellite. That feed drives NLN’s live KP chart, but it has been returning bad data since Thursday. Given that it is a holiday in the United States, we aren’t anticipating that it will be functional until at least tomorrow. That means aurora hunters will be flying blind! You can see the current solar wind data from ACE here. Your best bet is to go out and hope there is a show.

Mars

Also in the May 30th sky, Mars is at it’s brightest in the Earth sky in 11 years. The red planet is in the closest position it gets to Earth (known as “opposition”) which happens about once every 2 years and 2 months. This approach is actually the closest since 2003, when NASA sent the Opportunity and Spirit rovers to Mars. It will visible as a bright red “star” rising right around sunset. It will be easy to find in the southeastern (Northeastern for our southern followers) sky in the hours just after sunset. If you go out stargazing tonight, keep an eye out it.

Infographic from EarthSky showing the location of Mars relative to the moon.
Infographic from EarthSky showing the location of Mars relative to the moon.

This great article from EarthSky explains in detail that tonight Mars will be 46.8 million miles from Earth, and why this is the best viewing year in the last 11 years. Well worth the read.

ISS

If you are in the Northeast States in the United States, there’s yet another reason to be out stargazing tonight. At about 9:12, the International Space Station will make a very bright flyby. It will be moving from the Southwest sky to the Northeast. It should be visible for some people for almost 6 minutes. Use the Astroviewer Observation web page to find the exact time for your location.

ISS will pass directly over Burlington, and be visible to most people in the Northeast May 30 starting around 9:12pm
ISS will pass directly over Burlington, and be visible to most people in the Northeast May 30 starting around 9:12pm

Happy Hunting!

Two days of G1 storming Expected April 13 and 14

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Northern Lights Now – A large coronal hole was pointed directly towards Earth on April 9th and 10th. The high speed solar wind from that exposed area is should impact Earth on April 13 and 14. Space weather forecasters are expecting two consecutive days of geomagnetic storming. That could bring several opportunities for Aurora hunters to experience the Northern and Southern Lights. Here’s an image from SDO from late on April 9 in AIA 211, a wavelength that makes it easy to see coronal holes:

Large Earth directed Coronal hole may bring Aurora on April 13 and 14.
Large Earth directed Coronal hole may bring Aurora on April 13 and 14.

SWPC is calling for two periods of active Aurora (G1 level storming). The first period is early on April 13 and the second is Early on April 14. For North American Aurora viewers this is in prime evening viewing time. Europeans viewers will have to stay up past midnight. See the NLN Aurora cast for April 13 and 14. The data behind this infographic comes from the Space Weather Prediction Center in Boulder Colorado

NLN AuroraCast for April 13 and 14 shows when to expect G1 storming
NLN AuroraCast for April 13 and 14 shows when to expect G1 storming

Note: It is not an error that both days have the same profile throughout the day. The is what the forecasting models have predicted.

Happy Hunting!