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Vincent Ledvina Profile picture
@Vincent_Ledvina
Jun 26 • 1 tweets • 1 min read • Read on X
Well... I just found out today that the proposed FY26 president's budget will eliminate the NSF graduate research fellowship program that is funding my Ph.D.

With that, Heliophysics will also be receiving massive cuts and many missions will be canceled. These include missions that are currently flying in space as well as ground-based instruments. For example, ACE is proposed to be canceled which would lead to the loss of EPAM data and reliable speed/density solar wind measurements.

Just curious... how many of you have heard of these budget cuts? I have assumed the crisis facing NASA/NOAA/NSF is common knowledge, but someone told me that most people have no idea that this is happening.

I can provide more resources on advocacy soon if you want to voice your concern about the proposed budget.

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More from @Vincent_Ledvina

Vincent Ledvina Profile picture
Aug 31
A solar storm is on the way and may cause a moderate or even strong geomagnetic storm on Monday or Tuesday. Impact is predicted for around 20 UT on September 1, and auroras may be seen further equatorward than usual on Monday and Tuesday night. Here's what you need to know... Image
Before we begin, a quick plug for my e-mail list where I sent out all this information earlier. I put a lot of work into crafting these alert messages, and they explain everything at a beginner level. You can sign up here to get these emails: go.theauroraguy.com/alerts
First, let me explain what is happening. An M2.7 flare from a magnetically-active region called "AR 4199" launched a coronal mass ejection (CME) that is heading towards Earth. It is forecasted to arrive around Sep 1 at 20 UT according to official modeling by NOAA SWPC. Image
Read 30 tweets
Vincent Ledvina Profile picture
Aug 30
Now that aurora season is in full swing, it's important to have some good kit to capture the moment when that substorm hits. Let's talk about aurora photography gear and my recommendations for cameras and lenses at a variety of budgets. 🌌📷🧵 Image
Before I go into specific models, let's talk about why you may or may not need to upgrade.

You probably have a phone that can take aurora pictures. While they can capture more than your eyes can see, it's impossible to print anything larger than a 4x5 and have it look good... Image
A professional photography kit (camera+lens) doesn't have to break the bank, though! In general, you want to look for two things:

1. A camera model with a manual mode.
2. A wide-angle lens with a large aperture.

In general, a good lens matters more than your camera. Image
Read 26 tweets
Vincent Ledvina Profile picture
May 31
G4 (Kp 8)/SEVERE Geomagnetic Storming is POSSIBLE tomorrow as a large CME is expected to hit Earth on June 1 around midday UT (morning North America). What is going on? Who will see aurora and when? How can you track this anticipated event? Read on! Image
Right now, there are some sunspot groups on the Sun facing the Earth. Specifically, AR (active region) 4100 and 4099 are directly facing Earth and magnetically complex, harboring potential for solar flares and CME eruptions... Image
Around midnight UT on May 31, an M8.2 solar flare occured from AR 4100, launching a shockwave through the solar atmosphere and CME out into space. Due to the position of the active region, this CME is heading directly at Earth. Image
Read 34 tweets
Vincent Ledvina Profile picture
Apr 14
Heads up aurora chasers! Tomorrow, we could see aurora down to mid-latitudes including the U.S.-Canada border, central Europe, New Zealand, and Tasmania. G2/Kp 6 conditions are currently anticipated. Let's break down why this happening, and who will see aurora at what times! 🧵 Image
First off, if you want to get these kind of threads emailed to you, you can sign up for my e-mail list: .

I send out these aurora alerts in anticipation of enhanced geomagnetic activity, and I try to give people a few days in advance to plan things out.go.theauroraguy.com/email
Okay, let's dive in!

First off, what is causing this forecasted period of enhanced geomagnetic activity? Well, yesterday morning UT time, we saw a nice filament eruption on the Sun. Filaments are like unstable plasma slinkies that can spontaneously lift off the Sun into space.
Read 30 tweets
Vincent Ledvina Profile picture
Mar 24
A very large coronal hole is now directly facing Earth. We may see a CIR/density compression followed by HSS (high speed stream) in the next 24-48 hours. These high-speed streams can trigger geomagnetic storms, usually of minor to moderate strength (Kp 5-6). Image
Here's a screenshot from my e-book "A Beginner's Guide to Aurora Chasing" which can be found for free using this link: .

It shows the characteristic solar wind pattern associated with the arrival of these high-speed streams. go.theauroraguy.com/ebookImage
In fact, NOAA SWPC has issued a G2 moderate geomagnetic storm watch for tomorrow. The exact timing of the arrival of the high-speed stream is looser than a CME - conditions usually change over the course of hours instead of during a CME where this is a shock at a moment in time. Image
Read 10 tweets
Vincent Ledvina Profile picture
Feb 11
What makes the aurora “explode?” In my most recent blog post, I go over a CRUCIAL concept in aurora chasing and space physics: Substorms! Learn more and read my blog: and in the thread below! 🧵theauroraguy.com/blogs/blog/wha…
Picture this… You’re out chasing the aurora in Fairbanks, Alaska watching a thin, faint arc stretching across the sky. Suddenly, this arc erupts and starts swirling and growing rapidly. Now, the aurora fills the sky with bright colors and active motion. Image
The intensity of the aurora is so bright you start seeing colors – greens and a thin fringe of purple on the bottom of the auroral arcs.
Read 81 tweets

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