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Jenna C. Hill

@chillocean.bsky.social
4.1K followers 153 following 140 posts

Marine Geologist w/USGS; likes to nerd out about marine geohazards, paleoclimate and seascape evolution; lover of dogs, soccer et al.

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Jenna C. Hill @chillocean.bsky.social · 04/09/2026
New mapping of Lake Chelan in Washington state from our team - lots of landslides! And stay tuned for more insights into the earthquake history. 🧪⚒️ www.usgs.gov/maps/color-s...
usgs.gov
Color-Shaded Relief Bathymetry of Lake Chelan, Washington
In 2023, the U.S. Geological Survey (USGS) completed a 3-week field operation in Lake Chelan, Washington, the third deepest lake in the conterminous United States, to acquire sediment cores, high-reso...
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Jenna C. Hill @chillocean.bsky.social · 03/09/2026
Yay Mud! Good memories with @seaicebeth.bsky.social #sikuliaq #beringlandbridge #geologyrocks #marinemud 🧪⚒️🌊
Photo of a marine sediment core with “Yay Mud” written on it.
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Jenna C. Hill @chillocean.bsky.social · 28/07/2026
Looks like you must be in Prince William Sound! And enjoying some nice weather 😎
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Jenna C. Hill @chillocean.bsky.social · 13/07/2026
It was lovely that day…today it’s 🌊🌊🌊, but the days are still sparkling! ✨
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Jenna C. Hill @chillocean.bsky.social · 11/07/2026
That sounds lovely (and delicious!).
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Jenna C. Hill @chillocean.bsky.social · 11/07/2026
Back in our happy #science place. Mapping earthquake-triggered submarine landslides in Prince William Sound, Alaska 🧪⚒️🌊 #USGS
Photo of a research vessel in Prince William Sound, Alaska
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Jenna C. Hill @chillocean.bsky.social · 19/06/2026
Love these fanquakes at the World Cup!! ⚽️🏆 Go Team USA 🇺🇸 !! On to the knockout rounds!
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Jenna C. Hill @chillocean.bsky.social · 19/06/2026
Btw, for all you submarine landslide and Cascadia enthusiasts - a new GIS data release of seafloor failure scarps w/ >9000 features! 🧪⚒️🌊 doi.org/10.5066/P1M8... This is a companion to our 2022 paper: doi.org/10.1016/j.ep... +ICMYI: Check out our related 2026 paper here: doi.org/10.1126/scia...
Map of the Cascadia subduction zone showing multibeam bathymetry coverage and seafloor failure scarps.
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Jenna C. Hill @chillocean.bsky.social · 18/06/2026
Some good news about OOI and for #Oceanography! 🧪🌊
nytimes.com
Trump Administration Backs Off Plan to End Ocean Monitoring
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Jenna C. Hill @chillocean.bsky.social · 02/06/2026
Wow. Dismantling the OOI arrays is a major loss for oceanography. 🧪🌊 oceanobservatories.org/2026/05/anno...
oceanobservatories.org
Announcement on NSF OOI Descoping - Ocean Observatories Initiative
The U.S. National Science Foundation (NSF) has initiated descoping of the Ocean Observatories Initiative (OOI) Major Facility. This plan includes the removal of all in-water infrastructure from the Ir...
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Jenna C. Hill @chillocean.bsky.social · 03/04/2026
You can get our central and northern Cascadia bathymetry compilations here for complete margin coverage! #USGS #MarineGeohazards 🧪⚒️🌊 Central: doi.org/10.5066/P9PE... Northern: doi.org/10.5066/P14S...
doi.org
Data Release 10.5066/P9PERGFK - Data Releases - Coastal and Marine Geoscience Data System
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Jenna C. Hill @chillocean.bsky.social · 03/04/2026
New data drop! Our updated seafloor bathymetry compilation for southern Cascadia is out!! This 30m grid covers nearly the entire continental slope offshore of Northern California and southern Oregon. #USGS #MarineGeohazards 🧪⚒️🌊 doi.org/10.5066/P9C5...
doi.org
Data Release 10.5066/P9C5DBMR - Data Releases - Coastal and Marine Geoscience Data System
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Jenna C. Hill @chillocean.bsky.social · 20/01/2026
A great partnership leads to great science! 🧪⚒️🌊 Read our new paper here: www.science.org/doi/10.1126/...
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Jenna C. Hill @chillocean.bsky.social · 16/01/2026
ICYMI: Our #USGS #scicomm put together a great video about our research into #earthquake records in the Cascadia subduction zone. 🧪⚒️🌊 You can read our new paper in Science Advances here: www.science.org/doi/10.1126/...
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Jenna C. Hill @chillocean.bsky.social · 16/01/2026
I’ve enticed our geophysicists into working in the sediment core lab…but they’re still on probation lol. 😉
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Jenna C. Hill @chillocean.bsky.social · 14/01/2026
Also, a big shout out to my #USGS and #MBARI colleagues! Collaborating on this project allows us to both work with a great team of scientists and provides access to cutting edge tools like @mbarinews.bsky.social AUVs and ROVs that offer unprecedented views of the deep seafloor. 🧪⚒️🌊
mbari.org
MBARI’s advanced underwater technology reveals history of earthquakes in the Pacific Northwest • MBARI
A new research publication, led by the USGS Pacific Coastal and Marine Science Center, used MBARI’s advanced technology to map the distribution of deposits left on the abyssal seafloor after an earthq...
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Jenna C. Hill @chillocean.bsky.social · 14/01/2026
This study is part of a much larger USGS effort to characterize geologic records of past earthquakes and reduce uncertainties in earthquake recurrence estimates that are used seismic hazard models. 🧪⚒️🌊 Read more about our project here: www.usgs.gov/centers/pcms...
usgs.gov
Cascadia Subduction Zone Marine Geohazards
Societal Issue: Uncertainty related to rupture extent, slip distribution, and recurrence of past subduction megathrust earthquakes in the Pacific Northwest (northern CA, OR, WA, and southern BC) leads...
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Jenna C. Hill @chillocean.bsky.social · 14/01/2026
Overall, this study changes the focus of how the scientific community studies prehistoric earthquakes in a subduction zone, reduces the uncertainties in the timing and frequency of large subduction zone earthquakes, and offers new opportunities to develop global earthquake records.🧪⚒️🌊
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Jenna C. Hill @chillocean.bsky.social · 14/01/2026
We propose a new geologic model for subduction zone marine paleoseismology that emphasizes uplift & recycling of the abyssal seafloor. Accretion and oversteepening on the lower slope sets the stage for landslides and provides a perpetual source of material to fail during each earthquake cycle. 🧪⚒️🌊
A new geologic model for subduction zone marine paleoseismology. See https://www.science.org/doi/10.1126/sciadv.adx6028 for details.
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Jenna C. Hill @chillocean.bsky.social · 14/01/2026
We think these landslides, which happen on the steep base of continental slopes, are happening along subduction zones globally. This means we should be able to find similar landslide deposits and associated marine turbidites in many places around the world. 🧪⚒️🌊
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Jenna C. Hill @chillocean.bsky.social · 14/01/2026
The punctuated timing of these underwater landslides also suggests evidence for seafloor movement during large earthquakes, similar to what was observed during the 2011 Tohoku earthquake and tsunami in Japan. If this were to happen in Cascadia, it could enhance tsunami hazards across the region. 🧪⚒️🌊
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Jenna C. Hill @chillocean.bsky.social · 14/01/2026
Our results show the links landslide scars on the lower slope, large debris deposits and abyssal turbidites. By clarifying how and where earthquake triggered turbidites are generated, our results improve confidence in using these deposits to reconstruct long-term earthquake histories. 🧪⚒️🌊
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Jenna C. Hill @chillocean.bsky.social · 14/01/2026
Our study shows that large megathrust earthquakes generate widespread landslides on the seafloor, with characteristic deposits called turbidites that can reliably be used to reconstruct earthquake history. 🧪⚒️🌊 Check out this USGS video describing our new findings:
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Jenna C. Hill @chillocean.bsky.social · 14/01/2026
Our research team from USGS & MBARI used autonomous underwater& remotely operated vehicles to collect detailed seafloor bathymetry, sediment cores and subbottom data. Together, these data allow us to examine the shape of the seafloor and the layers of sediment beneath that record earth history. 🧪⚒️🌊
AUV Bathymetry and subbottom data across landslides on the deformation front in the Cascadia subduction zone. See https://www.science.org/doi/10.1126/sciadv.adx6028 for more details.
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Jenna C. Hill @chillocean.bsky.social · 14/01/2026
Our new paper on earthquake records in the Cascadia Subduction Zone is out today! The goal of our work is to reduce uncertainty in the timing and frequency of large earthquakes by investigating how and where subduction earthquake-triggered deposits are formed. 🧪⚒️🌊 www.science.org/doi/10.1126/...
science.org
Widespread abyssal turbidites record megathrust earthquake-triggered landslides and coseismic deformation in the Cascadia subduction zone
Lower slope failures produce abyssal turbidites that record shaking and coseismic deformation during megathrust earthquakes.
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Jenna C. Hill @chillocean.bsky.social · 20/12/2025
😆 Indeed! Don’t worry, we’ve had plenty of rain/fog days too!
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Jenna C. Hill @chillocean.bsky.social · 20/12/2025
⚒️🧪🌊Check out some sweet footage of our Alaska work for #FieldworkFriday: fb.watch/E5OENYnwwA/?... (Alas USGS is not on BlueSky 🦋 so you’ll have to check it out elsewhere)
fb.watch
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Jenna C. Hill @chillocean.bsky.social · 26/11/2025
Felt a cute little pair of shakers in Santa Cruz
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Jenna C. Hill @chillocean.bsky.social · 11/10/2025
Copper River delta, Alaska. So much sediment!!
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Jenna C. Hill @chillocean.bsky.social · 11/10/2025
Always!
View of Copper River Delta, Alaska with airplane wing. View of Copper River Delta, Alaska from airplane.
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Jenna C. Hill @chillocean.bsky.social · 29/08/2025
New seafloor mapping offshore Alaska in the Alaska-Aleutian subduction zone! #USGS #NOAA #MarineGeohazards 🧪⚒️🌊
usgs.gov
New seafloor mapping offshore Kodiak Island, Alaska, reveals extensive submarine landslides
In summer 2025, a research team led by the USGS worked with the NOAA ship Rainier to map a large swath of seafloor offshore of Kodiak Island, Alaska, along the Alaska-Aleutian Trench.
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Jenna C. Hill @chillocean.bsky.social · 15/08/2025
Alaska Earthquake Center posted a nice explainer video with some of the video reconnaissance following the recent #landslide and #tsunami in Tracy Arm, south of Juneau, Alaska. It’s a whopper! 🧪⚒️
youtu.be
Early View of Tracy Arm Landslide Features
YouTube video by Alaska Earthquake Center
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Reposted by Jenna C. Hill
Jason "Jay" R. Patton @earthjay.bsky.social · 30/07/2025
the California Geological Survey has prepared a survey to gather your observations from the M8.8 Kamchatka, Russia Tsunami If you have been able to make any observations of the tsunami or of the evidence left behind by tsunami, we want your information: survey123.arcgis.com/share/76979d...
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Jenna C. Hill @chillocean.bsky.social · 30/07/2025
It’s important to point out that this is because Crescent City,CA is expected to see higher wave heights due to the local topography/bathymetry and focusing of the wave energy.
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Jenna C. Hill @chillocean.bsky.social · 30/07/2025
An important reminder from the US National Weather service regarding the US west coast tsunami advisories following today’s M8.8 Kamchatka quake:
“Friends please be aware, a Tsunami is a series of waves carrying a large extra mass of water to our coast.

This will NOT be a single wave.
Do NOT try to go to the coast to take photos.

You're not just putting yourself at risk, you will also put the people that have to rescue you at risk.”
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Jenna C. Hill @chillocean.bsky.social · 26/06/2025
The Ecosystems Mission area is a major component of the USGS Alaska Science Center, along with Earthquake, Landslide and Volcano Hazards, Energy & Minerals - these folks are hard working scientists who do great work. 🧪⚒️
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Jenna C. Hill @chillocean.bsky.social · 20/06/2025
“NPR reached out to the Office of Management and Budget to confirm the planned cut. In an email, a spokesperson replied, the EMA is, quote, "obviously irrelevant to science and is exactly the kind of waste President Trump ran on rooting out of the federal government."” 🧪⚒️
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Jenna C. Hill @chillocean.bsky.social · 20/06/2025
The USGS is the only non-regulatory federal agency with a mission to conduct science in the public interest. The President’s FY26 budget aims to zero out the Ecosystems Mission Area. The quote from the NPR story below shocked me. See what they do: geonarrative.usgs.gov/ecosystemsmi... 🧪⚒️
one.npr.org
🔊 Listen Now: This federal program helps track America's ecosystems. Trump's budget would gut it
All Things Considered on NPR One | 5:02
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Jenna C. Hill @chillocean.bsky.social · 08/06/2025
@anthropoceneman.bsky.social Some samples to go with your word of the day.
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Jenna C. Hill @chillocean.bsky.social · 08/06/2025
Ooh I do love a good turbidite!
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Jenna C. Hill @chillocean.bsky.social · 07/06/2025
Oof, yeah the weather is gnarly today!
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Jenna C. Hill @chillocean.bsky.social · 07/06/2025
We are in Prince William Sound. 🏔️
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Jenna C. Hill @chillocean.bsky.social · 07/06/2025
Rain or shine, it’s always a good day to survey submarine landslides in #Alaska! #USGS #Coastal & #Marine #Geohazards 🧪⚒️🌊
Two people deploying chirp sonar from small boat in Alaska. Two people deploying chirp sonar from small boat in Alaska. Chirp subbottom profile across multiple buried landslide deposits. View of mountains and water through window on a boat with a subbottom data processing computer screen in the foreground.
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Jenna C. Hill @chillocean.bsky.social · 17/05/2025
I picked up one when we were there 2 years ago and was psyched to see it had been updated with info about the 2018 eruptions, so we went to check those out!
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Jenna C. Hill @chillocean.bsky.social · 16/05/2025
Everytime I this video of surface rupture/offset from the recent Myanmar #earthquake it’s 🤯 and now a peek athe rupture up close from thr otber side if the fence - so cool! 🧪⚒️ Link to original video: youtu.be/77ubC4bcgRM
youtu.be
First fault rupture ever filmed: M7.9 surface rupture filmed near Thazi, Myanmar
YouTube video by 2025 Sagaing Earthquake Archive
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Jenna C. Hill @chillocean.bsky.social · 07/05/2025
I haven’t used it since last summer’s fieldwork, but I think it was Bluetooth.
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Jenna C. Hill @chillocean.bsky.social · 07/05/2025
We use a portable monitor that has basically the same form as a tablet for bridge displays for this purpose.
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Jenna C. Hill @chillocean.bsky.social · 02/05/2025
@seaicebeth.bsky.social @oceanandclimate.bsky.social @micropaleo.bsky.social Any ideas of what this might be?
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Jenna C. Hill @chillocean.bsky.social · 02/05/2025
I am pretty sure it is organic, but I got this photo from a collaborator, so I haven’t seen the sample first hand.
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Jenna C. Hill @chillocean.bsky.social · 02/05/2025
Another curious specimen from marine sediment cores - anyone have thoughts on what these copper brown coils might be? Could be terrestrial (from ice age) or marine. 👽, 🐌, 💩 have all been suggested… This sample is from the Bering Shelf in about 40m of water. 🧪⚒️🌊
Microscope photo of sediment aggregate from the Bering Shelf with copper, brown coils of unknown origin.
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