Search found 28 matches

by lisa
Tue Aug 21, 2018 7:51 pm
Forum: Scientific Journals
Topic: An Updated Solar Cycle 25 Prediction with AFT: The Modern Minimum
Replies: 0
Views: 601

An Updated Solar Cycle 25 Prediction with AFT: The Modern Minimum

Lisa A. Upton, David H. Hathaway Over the last decade there has been mounting evidence that the strength of the Sun's polar magnetic fields during a solar cycle minimum is the best predictor of the amplitude of the next solar cycle. Surface flux transport models can be used to extend these predictio...
by lisa
Tue Aug 21, 2018 7:39 pm
Forum: Q&A
Topic: Earth's weakening magnetic field/solar storms
Replies: 10
Views: 5881

Re: Earth's weakening magnetic field/solar storms

What do you think the chances are of another Carrington Event occurring? Hi Phobos, Another great question! I think that there is no doubt that another Carrington Event will occur - the real question is when? Unfortunately, we don't have enough data to really iron out those statistics. However, som...
by lisa
Thu Jul 12, 2018 8:59 pm
Forum: Q&A
Topic: Earth's weakening magnetic field/solar storms
Replies: 10
Views: 5881

Re: Earth's weakening magnetic field/solar storms

Dear Misu, Thank you for your question! What happens during a solar maximum? During solar minimum, the Sun experiences and increase in all types of activity, such as sunspots flares, and coronal mass ejections. What does a solar storm do to the earth? Most times the Earth is protected by our magneti...
by lisa
Wed May 02, 2018 11:54 pm
Forum: Q&A
Topic: Coronal holes
Replies: 3
Views: 2184

Re: Coronal holes

Hi Phobos, My apologies for the delay getting back to you! As always, great question!!! Though it's a bit of a crude description, it is based in truth. Coronal Holes are regions where there are large uni-polar regions with an open magnetic field. As a sunspot or active region evolves and decays, the...
by lisa
Tue Mar 27, 2018 4:25 pm
Forum: Q&A
Topic: Forbush Decrease
Replies: 4
Views: 2417

Re: Forbush Decrease

Hi again Phobos! I spoke to one of my colleagues, Joan Burkpile, who tells me that the 'Forebush Decrease' refers to a drop in the cosmic ray background when a CME passes the Earth. She went on to tell me that: This is now known to occur during the passage of a shock. The decreases do not provide an...
by lisa
Fri Mar 23, 2018 5:02 pm
Forum: Q&A
Topic: Forbush Decrease
Replies: 4
Views: 2417

Re: Forbush Decrease

Hi Phobos,

Unfortunately, I've not heard of this phenomena. However, I'll check with some of my colleagues and look into it to see if I can get you an answer.

Cheers,
-Lisa
by lisa
Mon Mar 05, 2018 10:39 pm
Forum: Q&A
Topic: Earth's weakening magnetic field/solar storms
Replies: 10
Views: 5881

Re: Earth's weakening magnetic field/solar storms

Hi Phobos, The Earth's magnetic field is generated by the liquid Iron in Earth's core. As the magma that makes up the fluid iron core moves, it generates a moving electric current, which in turn generates Earths magnetic field. (This is know as a dynamo and is also occurring in the Sun). So, the rev...
by lisa
Sat Feb 24, 2018 4:43 am
Forum: Q&A
Topic: Earth's weakening magnetic field/solar storms
Replies: 10
Views: 5881

Re: Earth's weakening magnetic field/solar storms

Hi Phobos, Not at all!!! Apparently, Earth's magnetic field is weakening quite rapidly. So does that mean that minor solar storms can impact the grid, and be capable of causing more outages? So, let's start at taking a look at what this actually looks like. Here's a plot showing the evolution of the...
by lisa
Tue Feb 20, 2018 10:58 pm
Forum: Q&A
Topic: Metallic hydrogen
Replies: 5
Views: 3272

Re: Metallic hydrogen

Hi all, Unfortunately, I have to disagree with ElectricDragon. Our understanding of the Sun and star formation is quite robust and firmly supported by the observations. While I certainly encourage scientific inquiry, I believe the notion of the electric universe and the ideas in Dr. Robitaille's pap...
by lisa
Tue Feb 20, 2018 10:41 pm
Forum: Q&A
Topic: Energy from the Sun
Replies: 3
Views: 2512

Re: Energy from the Sun

Hi Phobos! Once again, great questions! My apologies for the late response, but I was out of town for the weekend. Apparently, measurements from spacecrafts have shown that during solar minimum, the Sun becomes overall slightly fainter. So if we're heading for a GSM, does this mean that it will get ...