Prof. Dr. Dan guy -issimo.

"car to scale"

This is why we need continuity of measurements,overlap and redundancy of measurements across different locations! The answer has real world implications for how we run and train models and understand how storms arrive at Earth from the sun!

I'm not sure why this is- the two spacecraft are surely seeing different parts of the CME, but a 20x difference is humongous! There are degradation factors with ACE and inter-calibration efforts yet to come.

NOAA's real time data feed from the ACE spacecraft. Density is shown in the center plot (orange dots) and never gets higher than 20 ions per cubic centimeter.

The corresponding data from IMAP. Density (middle frame) reaches as high as 200 ions per cubic centimeter.

Shocking contrast between the solar wind density values observed by IMAP versus ACE- as much as 20 times higher in the new IMAP versus the very old ACE!!!

We know ACE is getting old, but holy smokes that's a staggering difference.

3) NASA wants to try to get science missions into space more quickly, but I don't know what this means yet. This is a goal expressed in multiple venues yet, but we're all still waiting to see how this transpires.

2) We are about to enter a new era in solar wind observations. IMAP's I-ALiRT data goes live next week (!!!) and the SOLAR-1 spacecraft is going live this spring. These are much needed resources for end users, aurora watches, and researchers!

1) Agencies, especially NASA, are ramping up research-to-operations work in space weather in new and thoughtful ways. They are working on new proposal opportunities for R2O and experimenting with ways to support effective R2O2R efforts.

Had a great #AMS2026 on the space weather side. Probably my most productive AMS meeting in some time! Here are my big takeaways:

ICE murdered Renée Good in broad daylight. Less than 3 weeks later, they killed Alex Pretti, shooting him 10 times. Every day, we watch as people are ripped from their cars, their homes, their lives.

We can't allow ourselves to look away from this cruelty. Abolish ICE.

It can get lower!

"Ships immediately"

My AMS presentation next week is going to be the fashion statement of the century.

Shoes made to look like mossy rocks

Where would you even wear these

Seeing all these aurora pics from Europe...

Two things from my end:

Here at Umich, we've wound up the SWMF to do a real-time run with our latest research version of the model. I'll post some synthetic aurora as the run evolves.

We are also testing a ground magnetometer about 20 miles outside of Ann Arbor. I'll share preliminary data!

Damn, this storm is evolving fast. I can't keep up with everything. Auroral index is through the roof. GOES spacecraft are outside the magnetosphere (and scared, prolly).

I can't keep up with the great people posting info in real time!!

Space weather storm is here! ...EARLY! This is a good sign for mid-latitude aurora.

Unfortunately, real time solar wind data is giving erroneous velocity data (a near constant 300 km/s). We'll pay attention to density and magnetic field to see how this unfolds.

Congrats! Well deserved!

...so it was super neat to see this outsider overview reflect what I see when I'm there- the "scars", but also the excitement and growth.

Also, go lions.

YouTube video by Ray Delahanty | CityNerd I Visited the Capital of Motordom and I Have Thoughts

This was super cool to watch, especially the concluding message at the end about American cities.

www.youtube.com/watch?v=c062...

I love Detroit; my parents are from the city and it's part of my heritage. I have been lucky to do a lot of fun things in the city as of late.

Great day to have functioning eyes and a working brain

Not a bad year for running off stress.
strava.app.link/CFs81zq5HZb

aaaaaaaaaaaaaaaAAAAAAAAAAAAAAAAAAAAAAAAAHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH

I am genuinely happy that, as a lions fan, we have @arif.bsky.social to help us through this crappy Xmas day game. #goloins

BREAKING NEWS: NASA telescope photographs unidentified object transiting the Sun this morning.

However, the shifts on NSF programs and priorities is also disturbing. Critical programs are being "archived" (effectively shut down). Many programs are being consolidated without expanding available funding. The science productivity of the US is about to plummet, and we'll be worse for it.

The news concerning tearing apart NCAR is especially distressing- it's a dangerous precedent to end one of the world's most successful, productive centers because their findings on the climate are inconvenient.

#AGU25 this week has been a joyful and grim time. It's great to see colleagues and friends, and the meeting is always overwhelmingly productive. However, we continue to learn about the depths to which the current administration is attempting to dismantle science.

#AGU25 folks, there is a rapid- response town hall TODAY on the #NCAR dismantling at 1 pm, La Nouvelle Orleans ballroom C (per an AGU media advisory)

3 short tweets: agents in the area.
3 long tweets: an active arrest is occurring.

How do you get ready for #FallAGU in 2025? By printing ICE whistles, of course.