Penny Wieser
@pennywieser.bsky.social
Assistant Prof studying Volcanoes. ♥️Microanalysis, Python 🐍, Open Science. Laser Radial sailor ⛵, Bike advocate 🚲. Chronically Ill (GI). She/her
It's bananas to me they don't actively put cops on bikes. I probably see 10 traffic infringements each day on my 15 min bike ride to work. At what, $100 per ticket, they could make serious bank
November 4, 2025 at 2:36 AM
It's bananas to me they don't actively put cops on bikes. I probably see 10 traffic infringements each day on my 15 min bike ride to work. At what, $100 per ticket, they could make serious bank
Honestly, given my interaction with a POS police officer who decided a bike was always responsible for a bike crash even when a car came into a bike lane, I think I would rather have interacted with chatgpt.
November 4, 2025 at 2:28 AM
Honestly, given my interaction with a POS police officer who decided a bike was always responsible for a bike crash even when a car came into a bike lane, I think I would rather have interacted with chatgpt.
I would love to buy one! How much? I only brought very limited cash.
October 20, 2025 at 3:57 AM
I would love to buy one! How much? I only brought very limited cash.
It is indeed true. www.nbcnews.com/science/scie...
Whoops! Earth's oldest 'diamonds' actually polishing grit
www.nbcnews.com
October 18, 2025 at 2:24 PM
It is indeed true. www.nbcnews.com/science/scie...
And to be pushed off the sofa! We end up with our Ikea sofa bed in sofa bed mode, else the dog takes up the entire width.
October 17, 2025 at 5:11 AM
And to be pushed off the sofa! We end up with our Ikea sofa bed in sofa bed mode, else the dog takes up the entire width.
Amazing. What kinda scale are the grains?
October 13, 2025 at 2:45 PM
Amazing. What kinda scale are the grains?
This is amazing!! What's the gadget?
October 13, 2025 at 2:32 PM
This is amazing!! What's the gadget?
He then decided to tell me ebikes have to stop at stop signs. Sir, this happened in the middle of a street. Jesus christ, this is why no one reports stuff to the police.
October 7, 2025 at 11:28 PM
He then decided to tell me ebikes have to stop at stop signs. Sir, this happened in the middle of a street. Jesus christ, this is why no one reports stuff to the police.
Infact he kept telling me it wasn't possible for a car to turn left onto me. Why can't you use some intuition that if street view says a pic was taken in 2022 in a city putting in new bike infrastructure, maybe it's changed?! Surely the police have up to date maps
October 7, 2025 at 11:27 PM
Infact he kept telling me it wasn't possible for a car to turn left onto me. Why can't you use some intuition that if street view says a pic was taken in 2022 in a city putting in new bike infrastructure, maybe it's changed?! Surely the police have up to date maps
I said 'you mean cars hitting ebikes?', he said it was so clear he thinks a car cannot be at fault. He was looking at street view which has an old road layout 'maybe the guy didn't know there was a bike lane'. Sir, the road was painted bright green and has been for a year, he lives there...
October 7, 2025 at 11:25 PM
I said 'you mean cars hitting ebikes?', he said it was so clear he thinks a car cannot be at fault. He was looking at street view which has an old road layout 'maybe the guy didn't know there was a bike lane'. Sir, the road was painted bright green and has been for a year, he lives there...
I saw it coming as he began to turn and did slow down, but couldn't stop fast enough and a last minute swerve meant I went over the handlebars. Skinned palms are so sore for not looking too bad injury wise.
October 7, 2025 at 1:43 AM
I saw it coming as he began to turn and did slow down, but couldn't stop fast enough and a last minute swerve meant I went over the handlebars. Skinned palms are so sore for not looking too bad injury wise.
I also feel many of these numbers are entirely fabricated. You say 3 weeks to decision? Explain why every paper I've ever have submitted to you has sat on the editors desk for 4-6 weeks. I don't believe I'm that much of a statistical anomaly
October 2, 2025 at 9:11 PM
I also feel many of these numbers are entirely fabricated. You say 3 weeks to decision? Explain why every paper I've ever have submitted to you has sat on the editors desk for 4-6 weeks. I don't believe I'm that much of a statistical anomaly
We suggest that at both volcanoes the mush piles are as large as they can be, adding more olivine causes material to flow into the rift zones, and they are unable to get any larger without this happening. Overall, we think the plumbing system is dominated by one main reservoir at 3-5 km depth.
September 30, 2025 at 3:23 PM
We suggest that at both volcanoes the mush piles are as large as they can be, adding more olivine causes material to flow into the rift zones, and they are unable to get any larger without this happening. Overall, we think the plumbing system is dominated by one main reservoir at 3-5 km depth.
Interesting, the degree of deformation (quantified by the grain orientation spread or linear intercept distances) and the proportion of diferent fabrics was very similar to Kīlauea. This is surprising - Mauna Loa is bigger, has been active much longer, so should have a more accumulated olivine.
September 30, 2025 at 3:22 PM
Interesting, the degree of deformation (quantified by the grain orientation spread or linear intercept distances) and the proportion of diferent fabrics was very similar to Kīlauea. This is surprising - Mauna Loa is bigger, has been active much longer, so should have a more accumulated olivine.
We also looked at olivine deformation systematics. The picrites in particular show beautiful subgrains forming. By looking at the strike of subgrain boundaries, their weighted burgers vectors, and misorientation axes, we were able to identify the olivine slip systems responsible
![Signatures of deformation in Mauna Loa olivines. The leftmost column shows an EBSD map with each pixel colored using an inverse-pole figure (IPF) key (inset) where the color shows both the magnitude and direction of the deviation from the mean orientation of the grain (defined as white), with black colors showing deviation in orientation from the mean by more than 3°. Deformation intensity visibly decreases with decreasing GOS from a-c, shown by colors getting less intense, and showing a narrower range of hues. The central column shows the WBVD, with [100] directions as blue, [010] as green, and [001] as red. Note, this is different from the WBVD color key used in Wieser et al. (2020), but this cannot be changed in the software Aztec Crystal. The rightmost column shows the misorientation axes across the black subgrain boundaries marked on the IPF map. The colorbar shows the intensity of the coloring, e.g. a value of 16 means the orientations are 16X more concentrated in that region than elsewhere.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:vvbdpfdpbmmrizpjylro2cdx/bafkreib767hz5byuaedq7ng4cjioumzod3cnv7ncejwoonxugkagwbbm7i@jpeg)
September 30, 2025 at 3:20 PM
We also looked at olivine deformation systematics. The picrites in particular show beautiful subgrains forming. By looking at the strike of subgrain boundaries, their weighted burgers vectors, and misorientation axes, we were able to identify the olivine slip systems responsible
The more observant will notice there is a LOT of scatter in SO2 mol%, and at a given pressure, some have SO2 and some dont. We think this is because of the sluggish diffusion of SO2, and rapid FI sealing off. Sarah Shi did a great job of modelling this. Takes minutes to get SO2 into the FI.
September 30, 2025 at 3:18 PM
The more observant will notice there is a LOT of scatter in SO2 mol%, and at a given pressure, some have SO2 and some dont. We think this is because of the sluggish diffusion of SO2, and rapid FI sealing off. Sarah Shi did a great job of modelling this. Takes minutes to get SO2 into the FI.
The higher mol% SO2 at a given pressure vs. Kīlauea is explained by SulfurX, and XANES measurements by Saper showing higher S6+ proportions. The early degassing accounts for the otherwise confusing precursory SO2 emissions reported by Ben Esse. I was so excited I saw this! doi.org/10.1007/s004...
September 30, 2025 at 3:16 PM
The higher mol% SO2 at a given pressure vs. Kīlauea is explained by SulfurX, and XANES measurements by Saper showing higher S6+ proportions. The early degassing accounts for the otherwise confusing precursory SO2 emissions reported by Ben Esse. I was so excited I saw this! doi.org/10.1007/s004...
The most exciting result is the fact that we found lots of SO2 in our Raman spectra - it is typically stated that SO2 only degasses in the upper few 100m in Hawaii (cyan DCompress model). Our data suggests it starts degassing at a few km. This is backed up by newer models (e.g. SulfurX)....3/N
September 30, 2025 at 3:13 PM
The most exciting result is the fact that we found lots of SO2 in our Raman spectra - it is typically stated that SO2 only degasses in the upper few 100m in Hawaii (cyan DCompress model). Our data suggests it starts degassing at a few km. This is backed up by newer models (e.g. SulfurX)....3/N
Our fluid inclusion storage depths are remarkably consistent across eruptions spanning 10 kyrs, and align extremely well with geophysical estimates of magma storage. They are a bit deeper than Kīlauea (centered at 3 km vs. 1-2 km). Seems shield stage magma storage is stable once established. 2/N
September 30, 2025 at 3:10 PM
Our fluid inclusion storage depths are remarkably consistent across eruptions spanning 10 kyrs, and align extremely well with geophysical estimates of magma storage. They are a bit deeper than Kīlauea (centered at 3 km vs. 1-2 km). Seems shield stage magma storage is stable once established. 2/N
I've never understood the logic for excluding folks who did masters first.
September 29, 2025 at 3:49 PM
I've never understood the logic for excluding folks who did masters first.
The actual carving pumpkin bit isn't unusual to us so much as the fact that the grocery store has 20 species of extremely nobbly and inedible things that people don't carve, just buy as decorations!
September 27, 2025 at 1:22 PM
The actual carving pumpkin bit isn't unusual to us so much as the fact that the grocery store has 20 species of extremely nobbly and inedible things that people don't carve, just buy as decorations!
My first Halloween with housemates in Oregon, I told my housemate she had accidently left some vegetables on the front step, did she want me to bring them in? She had to explain it was for Haloween. I'm not surprised this squash was so hard to cook - I guess toughness is a feature as a decoration
September 27, 2025 at 3:06 AM
My first Halloween with housemates in Oregon, I told my housemate she had accidently left some vegetables on the front step, did she want me to bring them in? She had to explain it was for Haloween. I'm not surprised this squash was so hard to cook - I guess toughness is a feature as a decoration