Kelsey Jordahl
@kajord.bsky.social
Geophysicist by training, software engineer by profession. Interested in science, computing, data.
#remotesensing #python #scicomm #geospatial
Mastodon: https://hachyderm.io/@kajord
#remotesensing #python #scicomm #geospatial
Mastodon: https://hachyderm.io/@kajord
Reposted by Kelsey Jordahl
Volcano Hayli Gubbi erupted today in Ethiopia for the first time.
November 24, 2025 at 5:24 AM
Volcano Hayli Gubbi erupted today in Ethiopia for the first time.
Reposted by Kelsey Jordahl
An explosive #eruption of Hayli Gubbi #volcano, located SE of Erta'Ale in the Afar Rift (Ethiopia), began at ~08:30 UTC on Nov 23. Eruption onset was fortuitously captured by a @planet.com overpass at 08:31 UTC. Hayli Gubbi has no record of Holocene eruptions. Toulouse VAAC reporting ash to ~15 km.
November 23, 2025 at 5:23 PM
An explosive #eruption of Hayli Gubbi #volcano, located SE of Erta'Ale in the Afar Rift (Ethiopia), began at ~08:30 UTC on Nov 23. Eruption onset was fortuitously captured by a @planet.com overpass at 08:31 UTC. Hayli Gubbi has no record of Holocene eruptions. Toulouse VAAC reporting ash to ~15 km.
Reposted by Kelsey Jordahl
I find it incredibly sad and lame that Google's latest AI product release has stolen the name of an XKCD comic about restoring joy to programming (without attribution, as far as I can tell) for something that destroys joy, and creativity.
November 18, 2025 at 9:05 PM
I find it incredibly sad and lame that Google's latest AI product release has stolen the name of an XKCD comic about restoring joy to programming (without attribution, as far as I can tell) for something that destroys joy, and creativity.
Reposted by Kelsey Jordahl
What you see without an OGI camera vs what you see with an OGI camera.
What you are seeing in a plume of methane and VOCs.
You can see how it is so easy for them to ignore the ongoing systemic methane pollution.
What you are seeing in a plume of methane and VOCs.
You can see how it is so easy for them to ignore the ongoing systemic methane pollution.
November 13, 2025 at 4:56 PM
What you see without an OGI camera vs what you see with an OGI camera.
What you are seeing in a plume of methane and VOCs.
You can see how it is so easy for them to ignore the ongoing systemic methane pollution.
What you are seeing in a plume of methane and VOCs.
You can see how it is so easy for them to ignore the ongoing systemic methane pollution.
Reposted by Kelsey Jordahl
Satellite view (GOES-19) of a monster storm as it makes landfall yesterday.
(source: https://satlib.cira.colostate.edu/loop_of_the_day/hurricane-melissas-historic-day-in-the-caribbean/)
#Hurricane #melissa #xp
(source: https://satlib.cira.colostate.edu/loop_of_the_day/hurricane-melissas-historic-day-in-the-caribbean/)
#Hurricane #melissa #xp
October 29, 2025 at 9:52 PM
Satellite view (GOES-19) of a monster storm as it makes landfall yesterday.
(source: https://satlib.cira.colostate.edu/loop_of_the_day/hurricane-melissas-historic-day-in-the-caribbean/)
#Hurricane #melissa #xp
(source: https://satlib.cira.colostate.edu/loop_of_the_day/hurricane-melissas-historic-day-in-the-caribbean/)
#Hurricane #melissa #xp
Reposted by Kelsey Jordahl
Alrighty, ready to see something really cool? (and maybe a little nauseating)
The evolution of Hurricane Melissa's mesovortices at peak strength.
The evolution of Hurricane Melissa's mesovortices at peak strength.
October 29, 2025 at 8:10 PM
Alrighty, ready to see something really cool? (and maybe a little nauseating)
The evolution of Hurricane Melissa's mesovortices at peak strength.
The evolution of Hurricane Melissa's mesovortices at peak strength.
Reposted by Kelsey Jordahl
Yesterday Curiosity took pix of jagged peaks in the distance with its ChemCam. I stitched them together, did some work on them, and... just look at that view... I've been doing this since Sojourner landed & this is one of my fave images ever... Credits: NASA/JPL-Caltech/LANL/S Atkinson
September 23, 2025 at 8:48 PM
Yesterday Curiosity took pix of jagged peaks in the distance with its ChemCam. I stitched them together, did some work on them, and... just look at that view... I've been doing this since Sojourner landed & this is one of my fave images ever... Credits: NASA/JPL-Caltech/LANL/S Atkinson
Reposted by Kelsey Jordahl
Following up after a weekend of observing #Erin. The real track fell on the left side of the ECMWF Ensemble guidance envelope, but near a solid cluster of members.
Only one deepmind member showed a scenario remotely similar to what actually happened.
Only one deepmind member showed a scenario remotely similar to what actually happened.
August 18, 2025 at 10:47 AM
Following up after a weekend of observing #Erin. The real track fell on the left side of the ECMWF Ensemble guidance envelope, but near a solid cluster of members.
Only one deepmind member showed a scenario remotely similar to what actually happened.
Only one deepmind member showed a scenario remotely similar to what actually happened.
Reposted by Kelsey Jordahl
And it's done it! Alsek Glacier has left the island. @planet.com image is from Aug 9. 🧪⚒️❄️
August 13, 2025 at 2:59 PM
And it's done it! Alsek Glacier has left the island. @planet.com image is from Aug 9. 🧪⚒️❄️
and it occurs to me that I could/should move my personal website ( https://kjordahl.net ) off of GitHub pages as well, since it is just a static site. But another point of friction, and I'm not eager to do that work for little immediate return. But it is at least on my list to do so [1/2]
About me
About me
kjordahl.net
August 11, 2025 at 10:05 PM
and it occurs to me that I could/should move my personal website ( https://kjordahl.net ) off of GitHub pages as well, since it is just a static site. But another point of friction, and I'm not eager to do that work for little immediate return. But it is at least on my list to do so [1/2]
So yes, it is past time to diversify beyond #GitHub for open source repositories. Everything I have there these days is just low-traffic personal projects, so it is certainly possible without much trouble for myself. Not trivial for projects that manage issues, PRs, etc. there, though.
#xp
#xp
August 11, 2025 at 9:59 PM
Reposted by Kelsey Jordahl
The Krasheninnikov volcano on the Kamchatka Peninsula awakens from a centuries-long slumber, spewing ash into the atmosphere.
Along with an eruption from the nearby Klyuchevskoy volcano, both came less than a week after the 8.8 magnitude earthquake that struck the region.
Along with an eruption from the nearby Klyuchevskoy volcano, both came less than a week after the 8.8 magnitude earthquake that struck the region.
August 6, 2025 at 4:47 PM
The Krasheninnikov volcano on the Kamchatka Peninsula awakens from a centuries-long slumber, spewing ash into the atmosphere.
Along with an eruption from the nearby Klyuchevskoy volcano, both came less than a week after the 8.8 magnitude earthquake that struck the region.
Along with an eruption from the nearby Klyuchevskoy volcano, both came less than a week after the 8.8 magnitude earthquake that struck the region.
Reposted by Kelsey Jordahl
...and a M8.7 earthquake just hit the Kamchatka peninsula. I guess this lends weight to the megaquake advisory idea...
earthquake.usgs.gov/earthquakes/...
This is a big earthquake, capable of triggering a trans-Pacific tsunami. Find the latest tsunami warnings here: www.tsunami.gov
earthquake.usgs.gov/earthquakes/...
This is a big earthquake, capable of triggering a trans-Pacific tsunami. Find the latest tsunami warnings here: www.tsunami.gov
July 30, 2025 at 12:36 AM
...and a M8.7 earthquake just hit the Kamchatka peninsula. I guess this lends weight to the megaquake advisory idea...
earthquake.usgs.gov/earthquakes/...
This is a big earthquake, capable of triggering a trans-Pacific tsunami. Find the latest tsunami warnings here: www.tsunami.gov
earthquake.usgs.gov/earthquakes/...
This is a big earthquake, capable of triggering a trans-Pacific tsunami. Find the latest tsunami warnings here: www.tsunami.gov
Reposted by Kelsey Jordahl
The Earth Sciences still haven't figured out what they are in the absence of the oil industry.
At the moment, they collectively have a degree of freedom that's not really being recognized, let alone explored.
At the moment, they collectively have a degree of freedom that's not really being recognized, let alone explored.
July 21, 2025 at 6:09 PM
The Earth Sciences still haven't figured out what they are in the absence of the oil industry.
At the moment, they collectively have a degree of freedom that's not really being recognized, let alone explored.
At the moment, they collectively have a degree of freedom that's not really being recognized, let alone explored.
Reposted by Kelsey Jordahl
🧪⚒️ #NODSSUM cruise - On land, material & samples make their way back to home labs. And this morning we showed sonar images of barrels & photos taken by Ulyx flying at ~10 m above seafloor. Lots to do back in labs & offices. It was intense - good intense. Images: see copyright etc in thread
July 11, 2025 at 5:25 PM
🧪⚒️ #NODSSUM cruise - On land, material & samples make their way back to home labs. And this morning we showed sonar images of barrels & photos taken by Ulyx flying at ~10 m above seafloor. Lots to do back in labs & offices. It was intense - good intense. Images: see copyright etc in thread
Reposted by Kelsey Jordahl
It's been a long week. So here's just a pretty graphic for your Friday evening... Simulation of atmospheric aerosols in our intricate Earth system.
Sea salt (cyan), dust (magenta), black carbon (orange/red), and sulfates (green)
Created by NASA SVS (svs.gsfc.nasa.gov/5552/)
Sea salt (cyan), dust (magenta), black carbon (orange/red), and sulfates (green)
Created by NASA SVS (svs.gsfc.nasa.gov/5552/)
July 12, 2025 at 12:54 AM
It's been a long week. So here's just a pretty graphic for your Friday evening... Simulation of atmospheric aerosols in our intricate Earth system.
Sea salt (cyan), dust (magenta), black carbon (orange/red), and sulfates (green)
Created by NASA SVS (svs.gsfc.nasa.gov/5552/)
Sea salt (cyan), dust (magenta), black carbon (orange/red), and sulfates (green)
Created by NASA SVS (svs.gsfc.nasa.gov/5552/)
I gave a lightning talk yesterday on a silly little way to hide data in NaN values in floating point arrays: github.com/kjordahl/ste...
#SciPy2025 #Python
#SciPy2025 #Python
GitHub - kjordahl/steganan: Steganography in floating point data with NaN payloads
Steganography in floating point data with NaN payloads - kjordahl/steganan
github.com
July 10, 2025 at 3:21 PM
I gave a lightning talk yesterday on a silly little way to hide data in NaN values in floating point arrays: github.com/kjordahl/ste...
#SciPy2025 #Python
#SciPy2025 #Python
Reposted by Kelsey Jordahl
Only the third ever interstellar object: a tiny world that started its existence at another star. Now cruising in toward our Sun at ~58 km/s, a faint dot (V~18) in the Southern skies.
What a day 🔭
What a day 🔭
July 2, 2025 at 1:51 PM
Only the third ever interstellar object: a tiny world that started its existence at another star. Now cruising in toward our Sun at ~58 km/s, a faint dot (V~18) in the Southern skies.
What a day 🔭
What a day 🔭
Reposted by Kelsey Jordahl
A nice river, somewhere, meandering through a bit of glacial deposits and cutting into Upper Cretaceous shale and sandstone.
High-resolution prints are for sale on request (special edition!).
High-resolution prints are for sale on request (special edition!).
June 22, 2025 at 1:32 AM
A nice river, somewhere, meandering through a bit of glacial deposits and cutting into Upper Cretaceous shale and sandstone.
High-resolution prints are for sale on request (special edition!).
High-resolution prints are for sale on request (special edition!).
Reposted by Kelsey Jordahl
On 3 August 2024, a massive debris flow killed 27 people in the Ridi valley in Sichuan Province, China. A new paper (Cheng et al. 2025) describes how 12,000 cubic metres of landslides turned into a 380,000 cubic metre channelised debris flow. Image by @planet.com
eos.org/thelandslide...
eos.org/thelandslide...
June 23, 2025 at 7:21 AM
On 3 August 2024, a massive debris flow killed 27 people in the Ridi valley in Sichuan Province, China. A new paper (Cheng et al. 2025) describes how 12,000 cubic metres of landslides turned into a 380,000 cubic metre channelised debris flow. Image by @planet.com
eos.org/thelandslide...
eos.org/thelandslide...
Planet is hiring a Wildfire Data Scientist, based in San Francisco. Do you use remote sensing data to model and understand wildfire behavior? This is a great opportunity to work with cutting edge satellite imagery at global scale.
https://www.planet.com/company/careers/?jobid=6967679
#jobs [1/2]
https://www.planet.com/company/careers/?jobid=6967679
#jobs [1/2]
Careers - Satellite Imagery and Monitoring | Planet
We image the world everyday and make global change visible, accessible and actionable. We understand that images can tell the most powerful stories and we are dedicated to being a voice for our Planet to tell them. Join us. Become a part of our story.
www.planet.com
June 23, 2025 at 3:32 PM
Planet is hiring a Wildfire Data Scientist, based in San Francisco. Do you use remote sensing data to model and understand wildfire behavior? This is a great opportunity to work with cutting edge satellite imagery at global scale.
https://www.planet.com/company/careers/?jobid=6967679
#jobs [1/2]
https://www.planet.com/company/careers/?jobid=6967679
#jobs [1/2]
Reposted by Kelsey Jordahl
These are approx. 3 M m3 that collapsed from the Birch Glacier! 🧊🌊
The deposit spans 2.3 km of the Lötschental valley floor!
The deposit spans 2.3 km of the Lötschental valley floor!
May 28, 2025 at 7:20 PM
These are approx. 3 M m3 that collapsed from the Birch Glacier! 🧊🌊
The deposit spans 2.3 km of the Lötschental valley floor!
The deposit spans 2.3 km of the Lötschental valley floor!
Reposted by Kelsey Jordahl
INCREDIBLE !!
Here we are... 😱😱😱
After days of overloading and cracks propagating, Birch Glacier collapsed today at 3.24 pm over Blatten and the dammed Lonza river...
Devastating! 😭
www.letemps.ch/suisse/valai...
Here we are... 😱😱😱
After days of overloading and cracks propagating, Birch Glacier collapsed today at 3.24 pm over Blatten and the dammed Lonza river...
Devastating! 😭
www.letemps.ch/suisse/valai...
May 28, 2025 at 3:09 PM
INCREDIBLE !!
Here we are... 😱😱😱
After days of overloading and cracks propagating, Birch Glacier collapsed today at 3.24 pm over Blatten and the dammed Lonza river...
Devastating! 😭
www.letemps.ch/suisse/valai...
Here we are... 😱😱😱
After days of overloading and cracks propagating, Birch Glacier collapsed today at 3.24 pm over Blatten and the dammed Lonza river...
Devastating! 😭
www.letemps.ch/suisse/valai...
Was this photo of the Grateful Dead with Al Gore taken in the West Wing? Did the Clinton White House have a huge print of the Apollo 17 Blue Marble photo on the wall?
cc @rsimmon.bsky.social
#BlueMarble #xp
https://heads.social/@bourgwick/114552416447319048
cc @rsimmon.bsky.social
#BlueMarble #xp
https://heads.social/@bourgwick/114552416447319048
May 22, 2025 at 4:50 PM
Was this photo of the Grateful Dead with Al Gore taken in the West Wing? Did the Clinton White House have a huge print of the Apollo 17 Blue Marble photo on the wall?
cc @rsimmon.bsky.social
#BlueMarble #xp
https://heads.social/@bourgwick/114552416447319048
cc @rsimmon.bsky.social
#BlueMarble #xp
https://heads.social/@bourgwick/114552416447319048
So, I have managed to lock myself out of my own oven. It has been having trouble with temperature, occasionally overheating, so last night I decided to take out the temperature probe and test it to see if it is obviously the problem. It measured 1080 Ω, exactly what is expected at room
May 13, 2025 at 3:59 PM
So, I have managed to lock myself out of my own oven. It has been having trouble with temperature, occasionally overheating, so last night I decided to take out the temperature probe and test it to see if it is obviously the problem. It measured 1080 Ω, exactly what is expected at room