Aurora — May 11, 2024

The crescent moon, reddened by smoke in the air

The sec­ond night[1]First night is here. of the show was a bit tamer, and tem­pered by smoke in the air that ampli­fied all the ground lights. Still, it was a good night. I spent a cou­ple hours snap­ping pho­tos with my friend Kevin.

Brilliant green and purple aurora next to the moon, above a pineBrilliant green and purple aurora next to the moon, above a pine
Left: unedit­ed; right: colours edited

The smoke turned the cres­cent moon red­dish-orange, too.

The crescent moon, reddened by smoke in the air

Time­lapse. See if you can tell when the light was strong enough that I could see it reflect­ing off my hi-vis vest.

I was out from about 10:30pm till about half past mid­night. It was anoth­er good night.

Foot­notes

Aurora Borealis, May 10, 2024

Aurora Borealis - curtains of green light

A few days ago, the sun launched like 5 CMEs our way. This nat­u­ral­ly excit­ed all the auro­ra nerds, myself includ­ed[1]I charged all my cam­era bat­ter­ies and tried to keep my expec­ta­tions tem­pered..

CMEs are the usu­al cause of auro­ras, and when you get more than one at a time, the auro­ra show is usu­al­ly going to be more intense. So when night fell and the data was[2]were still look­ing intense[3]The KP index, for exam­ple, was between 7 and 9, its max­i­mum; most of the real­ly intense shows I’ve seen were at KP6 or so, I packed my gear and head­ed west of the city to one of the spot I like to use for auro­ra photos.

I arrived with day­light still fad­ing and start­ed set­ting up. There was anoth­er car near­by; they, too, were there to watch the show.

Here’s the first shot I got, unedit­ed except for straight­en­ing and crop­ping. Even in the twi­light you can see the purple/pinkish lines of aurora.

Aurora Borealis - faintly visible against the still-bright sky, not long after sunset
The first pho­to I took upon arriving

As it got dark, the lights got brighter. I had two DSLRs run­ning, and I snapped a few pho­tos with my phone, too. Appar­ent­ly my new phone has a bet­ter cam­era than the old one, or else it’s bet­ter at post-pro­cess­ing, because those shots were pret­ty good if I do say so myself.

I was there from about 10:15pm till just around mid­night. My friend Neal came for a vis­it, and there were about 3 or 4 oth­er cars that showed up on the stretch of road, too.

OK, enough talk­ing; here are the pho­tos. All the DSLR pho­tos were tak­en at 5 sec­ond expo­sures, ape­ture f/2.8 or f/1.8 on the 50mm lens[4]ie, as wide open as the lens­es would shoot, ISO 1600. The phone pho­tos were tak­en on night mode, using what­ev­er auto­mat­ic set­tings the phone decid­ed would work best.

First up: the DSLRs.

And here are the pho­tos from my phone.

And a cou­ple of time-lapse videos. In each video, 1 sec­ond is 1 minute of real time.

Foot­notes

Foot­notes
1 I charged all my cam­era bat­ter­ies and tried to keep my expec­ta­tions tempered.
2 were
3 The KP index, for exam­ple, was between 7 and 9, its max­i­mum; most of the real­ly intense shows I’ve seen were at KP6 or so
4 ie, as wide open as the lens­es would shoot

Aurora, Oct. 20th, 2023

Aurora above pine trees

I was out from about 10:30pm till mid­night, which—judging from some of the oth­er pho­tos I’ve seen—was too ear­ly for the real show. Regard­less, there was a haze at the hori­zon and I set up my cameras.

In the video, one sec­ond is one minute of real-time. The first minute and a half is from a cam­era point­ed straight north; the remain­der is aimed northwest.

Aurora, March 23, 2023

Aurora Borealis

Wow, that was a show.

The data looked ridicu­lous from the out­set. There’s one para­me­ter, when you’re con­sult­ing the ora­cle (sor­ry, the space-weath­er data), the Bz, that you want to be a neg­a­tive num­ber. I’ve seen great shows when the Bz was around ‑3 or ‑5. The longer it’s neg­a­tive, the better.

Yes­ter­day after­noon, every time I checked, the Bz was around ‑15. Crazy.

And the auro­ral oval looked like this. When it’s yel­low, that’s usu­al­ly a good sign. Red—that much red—is flat-out amazing.

The auroral oval from spaceweather.com, showing a large red patch over central North America
Con­tin­ue read­ing “Auro­ra, March 23, 2023”

Clouded Aurora

After I watched the new Top Gun talkie, I checked the data in my auro­ra app while I was still in the park­ing lot. It looked good[1]The Bz read­ing was ‑11, where the fur­ther into the neg­a­tive, the bet­ter; I usu­al­ly see a decent show if it’s at ‑4 or so., so I hur­ried home, grabbed my gear, and went out of town.

Unfor­tu­nate­ly it was cloudy to the north. I set up any­way, hop­ing the clouds would move off, and start­ed snap­ping photos.

Long sto­ry short: the clouds did­n’t move off. I gave it about 45 min­utes, and then packed up and went home.

Here’s a time­lapse of about 20 min­utes’ worth of my attempts. Each frame is a 10-sec­ond exposure. 

And here’s a hand­ful of my favourites from the pho­tos I got. (I think I caught a mete­or in the first one, on the far left.)

Foot­notes

Foot­notes
1 The Bz read­ing was ‑11, where the fur­ther into the neg­a­tive, the bet­ter; I usu­al­ly see a decent show if it’s at ‑4 or so.

Aurora at the end of March

Aurora, March 30th, 2022

The auro­ra data looked good and the sky was clear, so I packed up my camera—grabbing, at the last minute, my 50mm lens, think­ing I’d maybe get some shots of Ori­on with it—and head­ed out to find a dark spot.

10 min­utes north­west of town, I stopped on the side of a grav­el road and got set up. There was a faint haze to the north which, to the cam­era, was green (my eye saw it as grey). The data showed that there should be a bit more activ­i­ty in about a half hour, so I start­ed snap­ping pho­tos. Ini­tial­ly I was tak­ing pho­tos at 10 sec­ond expo­sures. As the night wore on I dropped that to 5 sec­onds, then 2.5 and final­ly 2. (I took a few frames at 1 sec­ond with my f/1.8 lens, but they were a lit­tle dark­er than I like.)

Here’s the results.

It was even vis­i­ble in town, if you knew what you were look­ing at. This pho­to was tak­en on my street, just before I went back in the house.

Aurora, March 30th, 2022
It was even vis­i­ble in town.
A short timelapse
Panorama of aurora

Added: I took a few pho­tos for a panora­ma to show how wide the show was. This stretch­es from the west to the east; the road vis­i­ble on the far left and the far right is, in fact, the same road.

Some faint aurora

It’s been a while since I went out chas­ing auro­ra. Tonight the clouds stayed away, and the tem­per­a­ture, while chilly, did­n’t feel like it was going to kill me. I got a cou­ple shots of the auro­ra, faint and hug­ging the north­ern horizon…

…and also an hour or so’s worth of star trails, includ­ing what looks like an irid­i­um flare. (It looks like my cam­era moved at some point ear­ly in the hour. I did­n’t jos­tle it; maybe the wind shift­ed it slightly.)

Star Trails