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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.

PostsRepliesMedia
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 · 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
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 · 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
⚒️🧪🌊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 · 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
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
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 · 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 · 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 · 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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Jenna C. Hill @chillocean.bsky.social · 29/04/2025
Check out this nice study about the cascading hazards in the Cascadia subduction zone 🧪⚒️🌊
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Jenna C. Hill @chillocean.bsky.social · 24/04/2025
Seafloor enthusiasts! We now have a complete set of high resolution seafloor bathymetry grids for the Cascadia subduction zone (offshore Washington, Oregon & northern California) available for download! #USGS #data #science #mapping #MarineGeohazards 🧪⚒️🌊 www.usgs.gov/programs/cmh...
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Jenna C. Hill @chillocean.bsky.social · 17/04/2025
I just heard some excellent news regarding one of these datasets - the IMLGS (Index to Marine & Lacustrine Geologic Samples) - SESAR2 (www.geosamples.org) has agreed to host it going forward! 🧪⚒️🌊 This is a super valuable dataset - thanks so much to these colleagues for stepping up.
geosamples.org
SESAR2
Welcome to the System For Earth Sample Registration (SESAR²) An Allocating Agent for IGSN
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Jenna C. Hill @chillocean.bsky.social · 17/04/2025
NOAA just announced a long list of datasets that are going away🧪⚒️🌊: www.nesdis.noaa.gov/about/docume... Download what you need asap and send comments to: ncei.info@noaa.gov
nesdis.noaa.gov
Notice of Changes
Notices of changes are formal public announcements of planned services changes to applications and other products.
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Jenna C. Hill @chillocean.bsky.social · 28/03/2025
Do you like submarine canyons? Check out this nice pilot study we did in Astoria Canyon, offshore Washington and Oregon - led by graduate student Evan Lahr - that shows a dynamic sedimentary environment. 🤓 🧪⚒️ Just published in Marine Geology: authors.elsevier.com/c/1kqiT5mVe1...
Bathymetric map of Astoria Canyon, located offshore of the Columbia River.
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Jenna C. Hill @chillocean.bsky.social · 22/03/2025
Did someone say World Glacier Day? I still love this shot of our boat from field work in Prince William Sound, Alaska last summer. We were up there up there studying submarine landslides and will hopefully be back this summer. 🧪⚒️
Photo of USGS research vessel with the Yale Glacier in the background in Prince William Sound, Alaska
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Jenna C. Hill @chillocean.bsky.social · 14/03/2025
Peeking at a little bit of sedimentological history 🧪⚒️ IYKYK…and if you don’t know these are old marine sediment cores with some famous names. #geologynerds
Photograph of D-tube containers with marine sediment core samples from 1976.
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Jenna C. Hill @chillocean.bsky.social · 07/03/2025
He does make the best Seismology tshirts! 🤘🏻🤘🏻
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Jenna C. Hill @chillocean.bsky.social · 26/01/2025
Jan. 26, 2025, marks 325 years since the last great earthquake on the Cascadia subduction zone. We still have work to do to understand when the next great quake will occur & how to best respond when the shaking starts. The M7 Dec 2024 offshore quake & tsunami alert highlighted these shortcomings. 🧪⚒️
times-standard.com
Lori Dengler | Big Cascadia anniversary: What we’ve learned and what we haven’t
Jan. 26, 2025, marks 325 years since the last great earthquake on the Cascadia subduction zone. It’s a time to reflect on what we’ve learned about this largest fault system in the lower 48 states a…
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Jenna C. Hill @chillocean.bsky.social · 25/01/2025
Faculty and staff at Sonoma State University were just notified of the closing of the Geology Department - they are organizing an email letter writing campaign for Monday 1/27 to rally support - see below🧪⚒️ It’s awful to see the closing of another Geology department and big loss for the community.
Urgent Save SSU GeologyHere’s how you can help:

On Monday, January 27th, we’re launching a campaign to rally support for the Geology Department. To maximize impact, we are asking you to email or call a list of influential community members (provided below).

We’ve included a template letter at the bottom of this email that you can use as is, or you can personalize it with your own thoughts and experiences—whatever works best for you. The most important thing is that you send something.
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Jenna C. Hill @chillocean.bsky.social · 10/01/2025
Just wrapped up a great 2 days of science 🧪 ⚒️ discussions at the #USGS Subduction Zone Science workshop with offshore and onshore observations in subduction zones to increase understanding of processes driving geohazards and communicating science to bolster societal resilience.
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Jenna C. Hill @chillocean.bsky.social · 24/12/2024
🌋Kilauea is erupting at the summit again! I’m thinking we should put the livestream on the TV in place of a fake fire 🔥 for holiday ambiance. 😆 Here’s the #USGS livestream - there’s some impressive lava fountains: 🧪⚒️ www.youtube.com/live/w0KulR_...
youtube.com
YouTube
Share your videos with friends, family, and the world
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Jenna C. Hill @chillocean.bsky.social · 13/12/2024
It’s the last day of #AGU2024 (good thing since I’ve lost my voice!) but there’s still plenty of great science today - come check out our poster session on Geohazards in Coastal, Marine and Lacustrine Environments (NH51G) 🧪⚒️ My poster on Cascadia earthquake records from marine turbidites is #2484.
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Jenna C. Hill @chillocean.bsky.social · 10/12/2024
Posting again b/c I forgot the symbols and the science is so cool!🧪⚒️
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Jenna C. Hill @chillocean.bsky.social · 09/12/2024
AGU put out a press release about our #AGU2024 presentations on the Bering Land Bridge (which, ICYMI is it a massive amount of exposed land during sea level lowstands!) Check out the teaser below and come see our posters if you are in town! PP23C-0564 to 0569 (Tuesday afternoon)
news.agu.org
Bering Bog Bridge? New research rewrites key crossing’s landscape
New research finds Bering Land Bridge was boggy with meandering rivers, not an arid steppe as previously thought
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Jenna C. Hill @chillocean.bsky.social · 09/12/2024
#AGU2024 week is here! We have a bunch of exciting posters on the paleolandscape of the Bering Land Bridge on Tuesday and then lots of great presentations on Cascadia and Alaska earthquake/tsunami/landslide hazards on Thursday/Friday. 🧪⚒️
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Jenna C. Hill @chillocean.bsky.social · 07/12/2024
Hi everyone - just a reminder that when there’s a big earthquake in your region, it is really helpful to earthquake scientists if you fill our the “Did You Feel It” report on the USGS earthquake event page - even if it was just mild shaking or you didn’t feel it all - all the data is helpful! 🧪⚒️
earthquake.usgs.gov
The Earthquake Event Page application supports most recent browsers, view supported browsers. Or, try our Real-time Notifications, Feeds, and Web Services.
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Jenna C. Hill @chillocean.bsky.social · 07/12/2024
Colleagues happened to be en route to field work in Eel River when M7 #earthquake happened yesterday near Cape Mendocino, so they got a great opportunity to document some co-seismic landslides. Here’s a couple of nice pics they snapped on the beach before the tides take it away. 🧪⚒️
Beach bluff failure from yesterday’s earthquake. Beach bluff failure from yesterday’s earthquake.
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Jenna C. Hill @chillocean.bsky.social · 05/12/2024
Wow! We really felt the Humboldt M7 and associated #earthquakes all the way down here in Santa Cruz just now. Have been scrambling around to get more info and see what we can do for response. Nothing like a little pre-#AGU earthquake excitement! earthquake.usgs.gov/earthquakes/...
earthquake.usgs.gov
The Earthquake Event Page application supports most recent browsers, view supported browsers. Or, try our Real-time Notifications, Feeds, and Web Services.
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Jenna C. Hill @chillocean.bsky.social · 05/12/2024
I feel like this is a common misconception, so I’m just going to put this out there: the “Bering Land Bridge”* was not ‘a small strip of land’. 🧪⚒️ *where the humans and lots of other animals migrated from Eurasia to North America during the last ice age (1/2)
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Reposted by Jenna C. Hill
Ele Willoughby @minouette.bsky.social · 04/12/2024
Hey! Earth science 🧪⚒️ and #scicomm folks, Eos is here!
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Jenna C. Hill @chillocean.bsky.social · 04/12/2024
A nice piece in the WaPo on the earthquake and tsunami hazards of the PNW featuring several of my wonderful and wonderfully talented colleagues!
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Jenna C. Hill @chillocean.bsky.social · 02/12/2024
I’ve been cramming in extra hours and asking myself why I thought it was a good idea to do 2 posters for #AGU2024 🤔 —>THERE’S JUST SO MUCH COOL #SCIENCE!! I’ve got a poster in the works on the paleo-landscape of the Bering Land Bridge and one on Cascade #earthquake records. It’s going to be fun!
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Jenna C. Hill @chillocean.bsky.social · 01/12/2024
This is a helpful explainer on how earthquake magnitude is measured…
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Jenna C. Hill @chillocean.bsky.social · 22/11/2024
Making plans for field work in Alaska next summer and looking forward to more spectacular scenery at sea! This was from one our anchorages in Prince William Sound last year. #FieldWorkFriday
Cove in Prince William Sound, Alaska. View of mountains, clouds and sky reflected in water.
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Jenna C. Hill @chillocean.bsky.social · 22/11/2024
@earth-science.bsky.social 👋🏻 Marine Geologist here, would you please add me to the Earth Scientists feed? Thx
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Jenna C. Hill @chillocean.bsky.social · 12/11/2024
Show me a picture, new or old of #AlaskaSky Dutch Harbor,September 2023
Spiraled lenticular cloud in Dutch Harbor, Alaska
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Jenna C. Hill @chillocean.bsky.social · 30/10/2024
Another microscope 🔬 mystery! Any ideas what this fossil might be? It’s about 1.5cm long. It was buried in about 2m of marine mud in 570m water depth, offshore of Washington. We think the mud is 10,000ish years old. #SciSky 🧪⚒️
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Jenna C. Hill @chillocean.bsky.social · 18/10/2024
Hey #scisky, anyone know what these bits of organic matter in the #microscope photos below might be? 🧪⚒️🔬I feel like we see this a lot but don’t know what it is. These particular samples are from marine sediment cores on the Bering Shelf.
Photo of sand grains and organic matter taken under a microscope.Photo of sand grains and organic matter taken under a microscope.
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