Jenna C. Hill

Copper River delta, Alaska. So much sediment!!

View of Copper River Delta, Alaska with airplane wing.

View of Copper River Delta, Alaska from airplane.

Always!

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.

New seafloor mapping offshore Alaska in the Alaska-Aleutian subduction zone! #USGS #NOAA #MarineGeohazards 🧪⚒️🌊

YouTube video by Alaska Earthquake Center Early View of Tracy Arm Landslide Features

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! 🧪⚒️

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...

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.

“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.”

An important reminder from the US National Weather service regarding the US west coast tsunami advisories following today’s M8.8 Kamchatka quake:

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. 🧪⚒️

“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."”
🧪⚒️

🔊 Listen Now: This federal program helps track America's ecosystems. Trump's budget would gut it All Things Considered on NPR One | 5:02

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...

🧪⚒️

@anthropoceneman.bsky.social Some samples to go with your word of the day.

Ooh I do love a good turbidite!

Oof, yeah the weather is gnarly today!

We are in Prince William Sound. 🏔️

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.

Rain or shine, it’s always a good day to survey submarine landslides in #Alaska! #USGS #Coastal & #Marine #Geohazards 🧪⚒️🌊

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!

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

I haven’t used it since last summer’s fieldwork, but I think it was Bluetooth.

We use a portable monitor that has basically the same form as a tablet for bridge displays for this purpose.

@seaicebeth.bsky.social
@oceanandclimate.bsky.social
@micropaleo.bsky.social
Any ideas of what this might be?

I am pretty sure it is organic, but I got this photo from a collaborator, so I haven’t seen the sample first hand.

Microscope photo of sediment aggregate from the Bering Shelf with copper, brown coils of unknown origin.

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.

🧪⚒️🌊

Check out this nice study about the cascading hazards in the Cascadia subduction zone 🧪⚒️🌊

USGS-authored or produced data and information are considered to be in the U.S. Public Domain.

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...

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.

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

We have a 30m bathymetry compilation that should be publicly available very soon! I will post the link when it comes out.

Ooh does that make you a submarine canyon fan? 🤣🤣

Bathymetric map of Astoria Canyon, located offshore of the Columbia River.

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...