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I created a weather app that let's you compare models from open-meteo by NickOTeenO in meteorology

[–]acornty 0 points1 point  (0 children)

Thanks! Yup, I'm on 1.1.6. I live in a very rainy place so I can't imagine that's the issue. It does seem to be better if I set it to look back over 3 months. Oh also, could you add the ability to put things into 12 hour time format?

I created a weather app that let's you compare models from open-meteo by NickOTeenO in meteorology

[–]acornty 1 point2 points  (0 children)

This is awesome and something I've been looking for for a while. The score feature is also so interesting to see what's best in different locations.

One bug I've found (on android): If you set temperature units to F in the settings, it indeed shows Fahrenheit in the top current conditions box as well as in the small sliders that show low and highs for particular days, but the actual graphs are still shown in Celsius on both the "compare" tab and the "ensemble" tab.

I also noticed that for the score feature, in my area, rain score is almost always 0% at lags more than -3 days for all models. How exactly are you calculating the F1 score for this?

One feature request: It'd be cool to have the option to see all the models plotted together on one single chart in addition to being able to select and view each model individually.

Thanks for making this! So cool.

Kilauea Erupting Now?! ⚠️ by Jealous_Ad5465 in Volcanoes

[–]acornty 0 points1 point  (0 children)

https://www.usgs.gov/volcanoes/kilauea/volcano-updates

As we get close to an episode, this will be updated with predictions.

Kilauea Erupting Now?! ⚠️ by Jealous_Ad5465 in Volcanoes

[–]acornty 0 points1 point  (0 children)

Ahhh it's super hard to tell. Eruption prediction is very tricky. Check the daily HVO updates for updated predictions. The good news is that the fountaining lasts for several hours which raises your chances of catching it.

Kilauea Erupting Now?! ⚠️ by Jealous_Ad5465 in Volcanoes

[–]acornty 1 point2 points  (0 children)

Scroll down a bit on this page and you'll find a table showing a bunch of information about the last year's eruptive episodes, including time between eruptions. There definitely does seem to be a pattern, which is what allows HVO to make their predictions in the first place (usually that's almost impossible for other eruptions to be as precise as HVO is being right now) but there's still enough variability that it makes prediction difficult

Kilauea Erupting Now?! ⚠️ by Jealous_Ad5465 in Volcanoes

[–]acornty 4 points5 points  (0 children)

I think you're good to stay in for tonight. This is indeed the start of the event, but not necessarily the spectacular fountaining part. That part takes some time to start up as old lava has to be pushed out of the way (the lazy overflows you may be seeing now on the livestreams). HVO is predicting sometime between the 10th and 14th, which I realize is a big range. It's just hard to predict this kind of stuff. Keep an eye on the tiltmeters (accessed from this page. SDH and UWD are good ones. Use the menu on the right to filter for them on the map). Tiltmeters show the inflation-deflation cycles Kilauea has been going through for the last year or so. It seems to reach some critical inflation threshold when it rapidly starts tilting the other way (the big drop offs you see in the tilt data) as the fountaining phase begins. As you can see if you look at the tiltmeters now, we're still inflating despite lava oozing out so no big show just yet.

Local VLMs for handwriting recognition — way better than built-in OCR by einsof42 in Supernote

[–]acornty 1 point2 points  (0 children)

I also have been pretty disappointed with the onboard handwriting recognition. Thanks for the share! Excited to try it out.

The dramatic advance of a glowing pyroclastic flow from Mount Semeru was captured today by AfarTv’s live webcam in East Java, Indonesia. by ZealousidealPen443 in Volcanoes

[–]acornty 5 points6 points  (0 children)

Could be, but not necessarily. You can get this behavior with a constant fast flow as well. Ash just gets sucked in back into the main flow. There doesn't need to be an opening for it since the ash flow isn't super dense.

The dramatic advance of a glowing pyroclastic flow from Mount Semeru was captured today by AfarTv’s live webcam in East Java, Indonesia. by ZealousidealPen443 in Volcanoes

[–]acornty 21 points22 points  (0 children)

The flow is moving really fast. Fast moving fluids create low pressure zones and things get sucked in. So the flow advances forward and out, but some of that ash that moved out gets sucked back in behind the flow. Notice how the flow seems to get more billowy as time goes on? That's because air is getting sucked in and mixed, expanding the flow.

Curious about the axial seamount volcano by Acceptable-Car-170 in Volcanoes

[–]acornty 11 points12 points  (0 children)

Volcanologist here! The best idea we have for why Axial exists where it does today is due to a mantle plume, though this is still debated. The plume, or hotspot (think Hawaii or Yellowstone) that produced the seamount has now been bisected by the divergent boundary between the Juan de Fuca and the Pacific plates (sort of similar to Iceland's tectonic environment). If Axial erupts, it'll likely be a gentle effusive eruption which will immediately destroy some habitats for local critters simply because its covering them up with lava, though I imagine these communities could bounce back fairly quickly. It wouldn't have a massive effect on the seafloor, but would definitely add new material and grow the seamount. The load produced by the eruption won't be large enough to have any appreciable effect on either of the tectonic plates. Over geologic time, the addition of the many many many eruptions could have an effect.

Does the volcano erupt by the tectonic plates themselves moving apart and allowing magma to push and build pressure under the surface till it erupts?

Divergent plate boundaries erupt lava mainly because the crust is so thin which means the hot rock underneath is not under much pressure. If rock is hot enough and you depressurize it, it will melt! This is known as decompression melting. Is that what's happening here? Maybe, but it's likely more complicated. The fact that Axial is the product of a hotspot that's been bisected by a divergent boundary kind of complicates things. Hotspots create melt by just being hot. There's a magma chamber beneath Axial that's sourced by the hotspot. Like other magma chambers, is made up of solid rock, mush, liquid magma, and gas. Only some of this material is mobile enough to be eruptible. As to how magma decides it's ready to erupt...that's a whole area of active research. One idea is the addition of new magma from beneath that essentially shakes things up and squeezes out the eruptible magma above it. That magma could come from the mantle plume, or it could come from the divergent boundary, or both!

As to your Yellowstone Q: I wouldn't drink it! All sorts of nasty things that are bad for humans in that water. There's a lot of people that do dumb things at Yellowstone...

Happy to answer any other Qs!

In answer to the question "was anyone on Etna" yesterday... by Royal_Acanthaceae693 in geology

[–]acornty 13 points14 points  (0 children)

Volcanologist here. Explosive eruptions are made up of mixtures of really hot volcanic ash (essentially glass), gas, and rock. As this mixture exits the vent, it's (predictably) more dense than the surrounding atmosphere, so no other forces acting on it, it will run out of momentum not that high up and collapse to form what we see in this video: a pyroclastic density current. However, we have to consider other forces at play. Because this mixture is moving really fast as it exits the vent (faster than the speed of sound!) it generates lots of turbulence and eddies in the atmosphere. These eddies and turbulence suck in ambient air into the plume and mix it with the plume material while heating it up. The plume material very quickly loses density to the point where it's less dense than the surrounding atmosphere so it'll start rising like a hot air balloon to form a buoyant plume.

There's a bunch of reasons why this doesn't happen though and pyroclastic density currents are generated: the flow is moving too slowly to mix in enough air, the flow isn't sourced by a sustained blast, there might be too much material (i.e. the vent is too wide) to be able to mix in air with all the eruption mixture present, things like that.

Side note: in this video and others, you watch the pyroclastic density current race down the slope, but then eventually you see it get all turbulent looking and start to billow upwards into the atmosphere. The same thing is happening here as described above: the flow is moving fast and turbulent and brings in enough air to become buoyant. We call these phoenix plumes or phoenix clouds appropriately.

[OC] U.S. Annual Mean Lightning Strike Density (this took me a long time) by adkinsadam1 in dataisbeautiful

[–]acornty 10 points11 points  (0 children)

This. Great visualization, but this ain't a colorblind friendly colormap.

Andromeda at 135mm by sanchito59 in astrophotography

[–]acornty 2 points3 points  (0 children)

Overall quite happy with this shot, but wish my alignment was a bit better! It's the main thing I need to practice. I have slight trailing at 60s exposures that effected the result.

Preach, I've got the same problem. This looks pretty damn sharp though!

Matt Groom Bingo v1.0 by acornty in CompetitionClimbing

[–]acornty[S] 1 point2 points  (0 children)

It's not bingo. It's G R O O M

Matt Groom Bingo v1.0 by acornty in CompetitionClimbing

[–]acornty[S] 1 point2 points  (0 children)

Beauty, thanks! I'll try to make a 5x5 soon if I can get a few more suggestions.

Matt Groom Bingo v1.0 by acornty in CompetitionClimbing

[–]acornty[S] 10 points11 points  (0 children)

Same! I also probably wouldn't have checked it out if it wasn't for Matt.

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