Kh Yabu
LightNews LightNews
kh-yabu.bsky.social
Kh Yabu
@kh-yabu.bsky.social
11 followers 32 following 9 posts
Fiber-optic seismology
Surface wave exploration
Seismic interferometry

https://x.com/Kh_Yabu
Posts Replies Media Videos
Reposted by Kh Yabu
seismosocam.bsky.social
In a new #SRL paper, scientists develop a modified ambient noise interferometer workflow that efficiently selects high-quality data.

pubs.geoscienceworld.org/ssa/srl/arti...
September 29, 2025 at 2:00 AM
Reposted by Kh Yabu
seismosocam.bsky.social
Heavier vehicles can produce seismic noise that helps scientists constrain structures at greater depths in urban settings via DAS, according to a new #SRL study. ⚒️

pubs.geoscienceworld.org/ssa/srl/arti...
August 25, 2025 at 3:00 AM
Reposted by Kh Yabu
rasjournals.bsky.social
Published in #GJI Geophysical Journal International: "Multistage deep clustering of urban ambient noise for seismic imaging—a case study for train-induced seismic noise", Zhao et al. These are Figs. 4 & 8: academic.oup.com/gji/article/... @oxfordacademic.bsky.social @royalastrosoc.bsky.social
Satellite map of the study region. The red dots represent the nodal seismic array, with spatial interval of 2 m. Characteristics of train sources. (a) Two different categories of trains identified from the x–t domain wavefield: the shorter continuous time segment indicates a high-speed train, while the longer continuous time segment indicates a freight train. Panels (b) and (c) show the corresponding f–k domain wavefields, which display discrete spectral characteristics.
August 4, 2025 at 8:36 AM
Reposted by Kh Yabu
seismosocam.bsky.social
A new #BSSA study found that seawater depth likely significantly affects the vertical component of offshore ground motion when it comes to Japan’s subduction zone earthquakes. ⚒️

pubs.geoscienceworld.org/ssa/bssa/art...
August 2, 2025 at 8:01 PM
Reposted by Kh Yabu
seismosocam.bsky.social
🌟OPEN ACCESS🌟Subsurface Imaging in Urban Environments: Utilizing Distributed Acoustic Sensing in Downtown Reno, Nevada #TSR ⚒️

Downtown Reno resides within the seismically active Truckee Meadows basin, so its subsurface geology is hidden. DAS can help.

pubs.geoscienceworld.org/ssa/tsr/arti...
July 6, 2025 at 3:01 PM
Reposted by Kh Yabu
earthscope.org
The Distributed Acoustic Sensing (DAS) array at the EarthScope Primary Instrument Center (EPIC) in Socorro, New Mexico captured some more curious visitors! 🦌🐺
May 29, 2025 at 5:20 PM
Reposted by Kh Yabu
fikgm.bsky.social
You can see the monitoring data of #Sakurajima from here.
jvdn.bosai.go.jp/portal/ja/%e...
No English UI available unfortunately but Google Translate works: jvdn-bosai-go-jp.translate.goog/portal/ja/%e...
桜島 | Japan Volcanological Data Network
すべての図が表示されるまで１分以上かかる場合があります。
jvdn.bosai.go.jp
May 21, 2025 at 11:38 AM
Reposted by Kh Yabu
fikgm.bsky.social
I am speechless...
>> First fault movement ever filmed. M7.9 surface rupture filmed near Thazi, Myanmar
m.youtube.com/watch?v=77ub...
First fault movement ever filmed. M7.9 surface rupture filmed near Thazi, Myanmar
YouTube video by 2025 Sagaing Earthquake Archive
m.youtube.com
May 12, 2025 at 1:17 AM
Reposted by Kh Yabu
rasjournals.bsky.social
Published in #GJI Geophysical Journal International: "Analysis of saturation effects of distributed acoustic sensing and detection on signal clipping for strong motions", Lin et al. This is Fig. 2: to read the paper please visit academic.oup.com/gji/article/... @royalastrosoc.bsky.social
Comparison of DAS signals of the main shock (M_W 7.06) recorded by two interrogators. (a–c) Seismic wavefields recorded at channels with different cable installations. The images show three specific channel sites at NW Lake, SW Lake and the basement, whose cables are buried, anchored to the building and loosely laid on the ground, respectively. (d–f) Signals from the channels with different cable installations shown in panels (a–c) not only exhibit significant ground-motion variability in the raw strain-rate records with OptoDAS represented by colour-coded lines (as in Fig. 1b) but also show different dynamic ranges between OptoDAS and iDAS by grey lines.
March 31, 2025 at 7:49 AM
Reposted by Kh Yabu
nature.com
Masaki Kashiwara is the first Japanese person to be awarded the most prestigious prize in mathematics

https://go.nature.com/4l4cy7f
Mathematician who reshaped theory of symmetry wins Abel Prize
Masaki Kashiwara is the first Japanese person to be awarded the most prestigious prize in mathematics.
go.nature.com
March 26, 2025 at 11:20 AM
Reposted by Kh Yabu
haroldtobin.bsky.social
I spoke with the 3 Seattle TV news stations to get the message out that the irrational spending freeze at USGS and the indiscriminate staffing cuts at NOAA are already hurting volcano, earthquake, and tsunami monitoring and warning. @pnsn1.bsky.social 1/3 ⚒️🧪 www.fox13seattle.com/news/funding...
24 years after Nisqually quake, funding cuts put WA seismic monitoring at risk
Federal layoffs from the Trump administration are raising concerns about the future of earthquake detection systems.
www.fox13seattle.com
March 1, 2025 at 4:58 PM
Reposted by Kh Yabu
rasjournals.bsky.social
Published in #GJI Geophysical Journal International: "Modelling noise H/V spectral ratio in a laterally inhomogeneous layered medium", Sánchez-Sesma et al. This is Fig. 12: for the caption & to read the paper please visit academic.oup.com/gji/article/... @royalastrosoc.bsky.social
Satellite image with location of the Chalco array at the southern part of the Valley of Mexico (Mapping Toolbox—MATLAB), with the measured points georeferenced in white. Stations marked with A, B and C were selected for discussion in Section 7.
February 14, 2025 at 1:10 PM
kh-yabu.bsky.social
「21歳、拳で👊」「24歳、学生です」などと散々ミームでキャッキャしてたけど今年はついに「異性間性交渉未経験　29歳男性」になってしまう
「配偶者なし子供なし生活能力なし48歳」になる日も近い…
December 31, 2024 at 5:07 PM
kh-yabu.bsky.social
精神おかしくなる5秒前みたいなのが常に続いている
April 29, 2024 at 5:02 PM
kh-yabu.bsky.social
正直言って＋2年でも学位取得危うい
April 7, 2024 at 3:21 PM
kh-yabu.bsky.social
まだ「京」だった時
April 4, 2024 at 5:29 PM
kh-yabu.bsky.social
自分が女性だったら確実に理系は選ばなかったし院にも進まないし、普通に恋愛して結婚して出産していた可能性がある
むしろ女性の進学率が高い欧米が不思議
April 2, 2024 at 5:29 PM
kh-yabu.bsky.social
お土産で北海道が負けてはならないという謎のプライドで空港を彷徨っている
March 4, 2024 at 6:08 AM
kh-yabu.bsky.social
March 2, 2024 at 3:51 PM
kh-yabu.bsky.social
どの辺がギャグなのかよくわからないのでマジレスすると、マグマは地球全体で見るとごく表層に近いところ（〜100km）にしか存在しない
gome7010.bsky.social 米 @gome7010.bsky.social · Feb 11
3日後使える！バレンタインで滑るギャグ「地球の真ん中がマグマなのって、ブランデー入りチョコと同じ構造だよね。ハッピーバレンタイン」
February 13, 2024 at 7:59 AM
kh-yabu.bsky.social
休日14時間睡眠してしまう
February 9, 2024 at 8:12 PM