Trestan @flare.observer · 10/09/2026The reaction-diffusion style patterns that form in the background are interesting. A similar pattern forms when you repeatedly blur and sharpen an image. 040
Trestan @flare.observer · 07/09/2026I recently switched to Arch Linux after 7 years of using Gentoo (all of high school and 3/4 of college!) because I still need Qt 5 for a little while longer. It's not so bad! 040
Trestan @flare.observer · 29/07/2026My first first-author paper, "SADCat: A Catalog of Supra-Arcade Downflow Events in Solar Flares", is now published in Solar Physics! Dr. Ryan French (@ryanjfrench.bsky.social) and I present a catalog of 178 solar flares with visible SADs as a resource for the broader solar flare community. ☀️ 1/4 2150
Trestan @flare.observer · 23/07/2026Growth and evolution of NOAA solar active region 14493 in the corona (left; extreme ultraviolet, SDO/AIA 211 Å) and its associated sunspots in the photosphere (right; visible light, SDO/HMI continuum) between 2026 July 18 and 22. ☀️🔭 081
Trestan @flare.observer · 22/07/2026Sunspots, filaments, and plage flanking the eastern arc of the solar equator captured yesterday (2026-07-20) in Hα and oriented so that the equator splits the image vertically down the middle. ☀️🔭 0131
Trestan @flare.observer · 18/07/2026Wildfire smoke and clouds passing in front of the Sun this morning 140
Trestan @flare.observer · 09/06/2026The Sun today in the seven SDO/AIA extreme ultraviolet bands from hottest (flaring plasma at ~10 billion K) to coolest (chromosphere plasma at ~10,000 K) plus SDO/HMI continuum. ☀️🔭 1121
Trestan @flare.observer · 23/04/2026The decaying solar active region that formed within a coronal hole from last week sans JP2 compression artifacts ☀️ 010
Trestan @flare.observer · 18/04/2026This region is likely the decaying remains of AR 14400 which we saw emerge within a coronal hole about one solar rotation ago (~27 days). ARs that form in this way typically have loops that fan out in all directions from the region's center like the tentacles of a sea anemone, hence the term. 110
Trestan @flare.observer · 18/04/2026Fittingly, the patch of bright loops in the lobster coronal hole's clutch is a decaying anemone region. ☀️ 140
Trestan @flare.observer · 09/02/2026Very clear solar physics bubble next to "Professional Astronomers & Astrophysicists" #heliophysics 0154
Trestan @flare.observer · 05/02/2026The "I am going to drink ocean water" guy is still active and uploads both. 031
Trestan @flare.observer · 02/01/2026Here is how I have been contributing to Wikipedia in 2025. Happy New Year! #wikipediaYIR 030
Trestan @flare.observer · 29/07/2025Testing this with SDO/AIA imagery of a series of eruptions from 2023 ☀️ 081
Trestan @flare.observer · 21/05/2025Small steam devils forming from the fog above a pool (water temp was 76°F and outside air temp was 56°F) 020
Trestan @flare.observer · 05/04/2025I just realized that the CU Boulder guest Wi-Fi default gateway is blocking all of my NTP packets... so I am right next to NIST physically but am not allowed to synchronize with their public time servers? 128.138.140.44 is utcnist.colorado.edu 020
Trestan @flare.observer · 25/03/2025Hα flare ribbons observed between the two peaks of a double-peak soft-X-ray flare of GOES class X1.0 and M7.3 on 2024 June 1. ☀️ #astrophotography 0405
Trestan @flare.observer · 02/03/2025New Moon illuminated by earthshine visible in non-operational GOES-19/CCOR-1 data from 27 February 2025 via @noaa.gov ☀️🔭 1131
Trestan @flare.observer · 02/02/2025Once again defeated by compression. Here is a nicer looking screenshot mid-eruption. 030
Trestan @flare.observer · 02/02/2025Here is an eruption over the Sun's northwestern limb observed in SDO/AIA's 171 Å passband a couple of years ago. Found this when I was cleaning an SSD, so I thought I'd share. (Footage courtesy of NASA/SDO and the AIA science team.) ☀️🔭 39910
Trestan @flare.observer · 17/01/2025This diagram I made and uploaded to Wikimedia Commons when I was 16 ended up being used in a peer-reviewed popular-science book. I dislike how the diagram turned out in hindsight, but I am flattered that someone decided it was usable for publication. 050
Trestan @flare.observer · 26/12/2024Here is how I have been contributing to Wikipedia in 2024. This year I also worked on two research projects at LASP, completed my 2nd and 3rd semesters of college, and started a UROP-funded assistantship. It was a productive year for me personally. #wikipediaYIR 040
Trestan @flare.observer · 25/12/2024Happy holidays ☀️ (Data were acquired by GONG instruments operated by NISP/NSO/AURA/NSF with contribution from NOAA; see alt text) 060
Trestan @flare.observer · 05/12/2024Most recent edit summary on En Wikipedia's article for SOHO: "this is not dragonball". lol ☀️ 030
Trestan @flare.observer · 27/11/2024I was downloading AIA data from JSOC at the exact moment it went down and had no idea this was the cause. I hope everyone is alright. 130
Trestan @flare.observer · 27/11/2024Here is the full text. It can also be found on page 88 of this 1972 NOAA technical memorandum: repository.library.noaa.gov/view/noaa/18... 020
Trestan @flare.observer · 27/11/2024Sensationalist space weather article published during the August 1972 solar storms. It is not unlike the space weather clickbait of today... 230
Trestan @flare.observer · 24/11/2024Another video of a solar prominence eruption that I had posted about before video was supported on Bluesky ☀️🔭 711927
Trestan @flare.observer · 13/11/2024I originally shared this filament eruption before video was supported on Bluesky, so here's the video. 🔭 811328
Trestan @flare.observer · 28/07/2024There are seven different numbered NOAA solar active regions pictured here. H-alpha image taken on 27-07-2024 at 17:46 UTC. 020
Trestan @flare.observer · 10/02/2024Solar filament eruption from February 6 originating in active region 13575. This region has since rotated behind the limb where it was responsible for yesterday's X3.3-class solar flare. (Footage courtesy of NASA/SDO and the AIA science team.) 🔭 14911
Trestan @flare.observer · 23/11/2023Solar filament dangling off of the Sun's southeastern limb captured 2023-11-20 in H-alpha. Active region 3489 is to the west, and the edge of active regions 3493 and 3494 are to the north. This prominence/filament has since erupted. 🔭 0241
Trestan @flare.observer · 16/11/2023Coronal mass ejection (CME) from earlier today with a classic light bulb silhouette visible in both GOES/SUVI 304 Å and in SOHO/LASCO C1 and C2 🔭 070
Trestan @flare.observer · 03/10/2023Solar prominence eruption today associated with an M1.9-class flare. (Footage courtesy of NASA/SDO and the AIA science team.) 🔭 1437
Trestan @flare.observer · 18/08/2023Solar filament eruption and weak, C5.2 flare from yesterday in AR 13397. This event also appears to be associated with a CME. (Footage courtesy of NASA/SDO and the AIA science team.) 🔭 0140
Trestan @flare.observer · 28/07/2023A stunning solar prominence eruption off of the Sun's northwest limb from earlier today. It appears to be associated with a CME. Here are four selected frames of the eruption from SDO/AIA, each about three minutes apart. (Footage courtesy of NASA/SDO and the AIA science team.) 051