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Reposted by Dr. Tiegan Hobbs

Nathalie Redick @nredick.bsky.social · Aug 21

we just saw one of the coolest sights yet on the #pacsafe2025 research cruise!! a huge pod of Pacific white-sided dolphins 🐬 looking for food off the back of the CCGS Tully

@thobbsgeo.bsky.social @rdave6.bsky.social @charbottles.bsky.social

#fieldwork #science #womeninstem #dolphins #wildlife 🧪

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Reposted by Dr. Tiegan Hobbs

JdF Emergency Program @jdfemerg.bsky.social · Aug 26

It's national dog day, show some love and plan ahead for your furry friend (kitty too!) Have an emergency kit for your pet. zurl.co/wzREj

Pet Emergency Kit

How to prepare an emergency kit for your cat or dog. For more information visit http://www.prepareyourself.ca

www.youtube.com

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Reposted by Dr. Tiegan Hobbs

SZ4D @sz4d.bsky.social · Aug 26

📣 SAVE THE DATE
Mark your calendars for the SZ4D Science Community Meeting in Long Beach, CA, April 20-22, 2026, preceded by an early career event. Full program, registration, travel grant applications available in the Fall. Open to all. More info -> www.sz4d.org/events/2026-...

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Dr. Tiegan Hobbs @thobbsgeo.bsky.social · Aug 18

That wave was a paid actor. 🌊

But seriously, thanks to @nredick.bsky.social and our other Apply-to-Sail participants for capturing some cool moments on #PACSAFE2025!

Nathalie Redick @nredick.bsky.social · Aug 18

sneak peek of @thobbsgeo.bsky.social’s interview for #pacsafe2025 during some 6m swells, she’s right: “…you’re not really in control of a lot of things” out here #fieldwork #scienceatsea #womeninstem

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Dr. Tiegan Hobbs @thobbsgeo.bsky.social · Aug 18

@nredick.bsky.social @charbottles.bsky.social @rdave6.bsky.social

Dr. Tiegan Hobbs @thobbsgeo.bsky.social · Aug 18

Yesterday afternoon we finished the final #Ocean Bottom #Seismometer recoveries for #PACSAFE2025, and started redeploying along the Explorer Plate! Here’s a look at our “full house”, with 23 instruments on deck.

#ScienceAtSea #Fieldwork @seos-uvic.bsky.social @eoas.ubc.ca @dalhousieu.bsky.social

Aft deck of a research ship, with many large blue steel stillage crates containing yellow circular ocean bottom seismometers. It is sunny, and one adult man stands on deck looking at the instruments.

A rainbow over the ocean, as seen from a research ship off the west coast of Canada.

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Reposted by Dr. Tiegan Hobbs

Dr. Wendy Bohon @drwendyrocks.bsky.social · Aug 17

PS - Earthquake hazards are inevitable in California, but we can lower our seismic risk by decreasing our exposure and vulnerability to those hazards.

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Reposted by Dr. Tiegan Hobbs

National Weather Service @nws.noaa.gov · Aug 18

5 am AST Mon, Aug. 18 Key Messages for Hurricane #Erin.
nhc.noaa.gov/refresh/grap...

Key Messages for Hurricane Erin with two maps showing the arrival time of tropical storm force winds and the forecast cone over the Atlantic Ocean.

1. Bands of heavy rainfall are expected today over portions
of Hispaniola and through Tuesday for the Turks and Caicos and
portions of the southeast and central Bahamas. Flash and urban
flooding are possible.

2. Tropical storm conditions are expected in the Turks and Caicos
Islands and in the southeast Bahamas today. Tropical storm
conditions are possible in portions of the central Bahamas late
today through Tuesday.

3. Erin is expected to produce life-threatening surf and rip
currents along the beaches of the Bahamas, much of the east coast of
the U.S., Bermuda, and Atlantic Canada during the next several days.

4. Interests along the Outer Banks of North Carolina and Bermuda
should monitor the progress of Erin as there is a risk of strong
winds associated with the outer rainbands during the middle part of
the week.

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Dr. Tiegan Hobbs @thobbsgeo.bsky.social · Aug 17

Luckily it’s calmed down into a beautiful day today — fingers crossed to finish our last 3 recoveries for #PACSAFE2025

#ScienceAtSea #WomenInSTEM @seos-uvic.bsky.social @ubcoceans.bsky.social

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Reposted by Dr. Tiegan Hobbs

Melaine Le Roy @subfossilguy.bsky.social · Aug 16

Sawyer Island located in the middle of Tracy Arm, 7 km downstream the landslide, shown here before and after the estimated 30-m high tsunami! 🌊😱

The isolated tree was particularly resilient! 🌲💪

Via @nikzimmer87.bsky.social

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Reposted by Dr. Tiegan Hobbs

The Weather Network @weathernetwork.bsky.social · Aug 17

Hurricane Erin is the Atlantic's fifth Category 5 hurricane since 2022—continuing an astonishing pace of high-end storms across the ocean basin.

An inside look at Hurricane Erin’s astounding rise to Category 5 - The Weather Network

Hurricane Erin is only the 43rd Category 5 storm ever observed in the Atlantic Ocean

www.theweathernetwork.com

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Reposted by Dr. Tiegan Hobbs

Ellen Prager, PhD @elprager.bsky.social · Aug 17

Hurricane Erin intensifies rapidly and hits CAT 5 status, bands battering Puerto Rico, dangerous ocean conditions offshore & along East Coast to come, & deployment of wave drifters in today's update for the All Hazards Consortium. Stay aware and stay safe! 🧪🌀🌊

www.youtube.com/watch?v=arwV...

CAT5 Hurricane Erin's Bands Battering Puerto Rico, Impacts to Bahamas, East Coast, Bermuda Likely

YouTube video by StormCenter Communications | GeoCollaborate

www.youtube.com

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Reposted by Dr. Tiegan Hobbs

Lucinda Leonard @lucindaleonard.bsky.social · Aug 16

Another active fault on Vancouver Island - our new paper documents evidence for at least 3 Holocene earthquakes on the Beaufort Range fault

Seismica @weareseismica.bsky.social · Aug 15

🌍The Beaufort Range fault is ACTIVE!
This right-lateral oblique Beaufort Range faulting occurs >100 km farther North than previously documented faults in the Cascadia forearc.
Read more: seismica.library.mcgill.ca/article/view...
NAU Research @nau-ses.bsky.social
UVic SEOS @seos-uvic.bsky.social

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Dr. Tiegan Hobbs @thobbsgeo.bsky.social · Aug 15

The biggest #wildfire on the #OlympicPeninsula in 74 years right now. Such a gorgeous piece of preserved #wilderness under threat, but inspiring to see how hard-working folks are working to protect structures.

John Ryan @heyjohnryan.bsky.social · Aug 15

Surreal scenes from Olympic National Park, where buildings and bridges have been wrapped in foil to save them from the #BearGulchFire #wawx
www.kuow.org/stories/smok...

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Reposted by Dr. Tiegan Hobbs

Mount St. Helens in 1980 @mountsthelens1980.bsky.social · Aug 13

#MSH45 | Aug. 7, 1980
Eruption #5
Mount St. Helens has been quiet since July 22.

12:17 p.m.: Harmonic tremors begin.
1:30 p.m.: USGS and UW warn an eruption is likely within hours.

4:26 p.m.: The mountain obliges—pyroclastic flows down the north breach; ash column to 44K feet, drifting northeast.

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Reposted by Dr. Tiegan Hobbs

Jenna C. Hill @chillocean.bsky.social · Aug 15

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! 🧪⚒️

Early View of Tracy Arm Landslide Features

YouTube video by Alaska Earthquake Center

youtu.be

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Dr. Tiegan Hobbs @thobbsgeo.bsky.social · Aug 15

What a success!

Doug Wiens @dougwiens.bsky.social · Aug 15

We recovered all 29 ocean bottom seismographs, after 20 months on the seafloor, no losses! The ship fantail is full of seismographs. Photo shows co-chief scientist Shawn Wei and I with the flag from the last instrument,signed by the science party of the December 2023 deployment cruise.

Reposted by Dr. Tiegan Hobbs

Dr. Heather McFarlin @volcanoheather.bsky.social · Aug 12

Also, here is a news story about this event from Alaska Earthquake Center website earthquake.alaska.edu/major-landsl... 🪨⚒️🧪

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Dr. Tiegan Hobbs @thobbsgeo.bsky.social · Aug 14

👀

Kenneth Becker @geophotographer.org · Aug 13

AEC shared this video, courtesy of LT Chip Baucom and CDR PJ Johansen, U.S. Coast Guard.

It shows the landslide that collapsed onto South Sawyer Glacier and Tracy Arm Fjord, about 60 miles southeast of Juneau.

More information to follow

www.facebook.com/share/v/1Ccc...

earthquake.alaska.edu

🧪⚒️🌊

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Dr. Tiegan Hobbs @thobbsgeo.bsky.social · Aug 14

Today we’re recovering #Ocean Bottom #Seismometers from near Cape St. James at the southern tip of #HaidaGwaii. They’ve been listening for a year and we hope they’ll tell us more about how the Pacific, North America and Explorer #TectonicPlates interact in this complex triple junction.
#PACSAFE2025

A yellow seismic instrument is suspended above the ocean from a ship’s crane. In the distance, there are some islands visible. It’s sunny with clouds and the ocean is a deep blue.

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Reposted by Dr. Tiegan Hobbs

Jason "Jay" R. Patton @earthjay.bsky.social · Aug 13

www.nbcnews.com/news/us-news...

Some Juneau residents urged to evacuate as Alaska's Mendenhall Glacier releases floodwater

On Tuesday morning officials confirmed water had started escaping the ice dam, with flooding expected late Tuesday and Wednesday.

www.nbcnews.com

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Dr. Tiegan Hobbs @thobbsgeo.bsky.social · Aug 12

Some critters hitched a ride on our ocean bottom seismometers for #PACSAFE2025, but we don’t know what they are. Found in the north east Pacific off the coast of BC, Canada, from depths of around 2000m. Any #biologists or #marine #scientists have ideas? @whoi.edu ?

@uvic.ca @ubcoceans.bsky.social

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Dr. Tiegan Hobbs @thobbsgeo.bsky.social · Aug 12

If you’re not already, consider following one of our #PACSAFE2025 Apply-to-Sail students, Nathalie!

Nathalie Redick @nredick.bsky.social · Aug 8

hanging out on the night shift of the PACSAFE 2025 OBS deployment/recovery cruise watching the sub-bottom profiler do its thing

#Pacsafe2025 #ScienceAtSea #GeoscienceOnboard #MarineGeophysics
#NRCanScience

@dalhousie.bsky.social @nrcanada.bsky.social @seos-uvic.bsky.social @uvic.ca

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Dr. Tiegan Hobbs @thobbsgeo.bsky.social · Aug 11

Had a sporty day yesterday on #PACSAFE2025: an instrument released early so we had to make a 3hr detour to get it before the storm carried it off. 4m seas by the time we got to it, but the awesome deck crew of the 🇨🇦 #CoastGuard Tully pulled it off no problem.

Today we start PACSAFE recoveries!

A seismometer (yellow donut-shaped instrument) is suspended from a ships crane, off the side of the boat. It is visibly windy.

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Reposted by Dr. Tiegan Hobbs

Brandon Bishop @brandontbishop.bsky.social · Aug 11

JFAST Drill Site--the experiment to drill the fault that slipped during the 9.1 Mw magnitude 2011 Tohoku Earthquake--on an active source cross-section sampling the fault. Thick lines are structures in the subducting plate, thin lines are in the overlying plate.
www.annualreviews.org/content/jour...

Seismic reflection cross-section across the Japan Trench. Point where the Pacific plate begins to dive beneath Japan is located ~7 km to the east (right) of the vertical line labeled Site C0019 (the drilling location), note that there's a 2x vertical exaggeration on this cross-section to allow easier identification of structures.
The Y-axis is in meters depth, with the seafloor running from 6000 meters to ~7500 meters depth along the cross-section. The drill core reaches about 1000 meters below the seafloor. X-axis is a reference number for individual reflection traces spaced every 6.25 meters laterally.
The subducting plate is characterized by strong velocity contrasts that produce thick reflectors in the active source seismic data, the overlying plate is characterized mostly by weaker velocity contrasts that produce thinner reflectors. The subducting plate has a surface that looks like trapezoids--these are offsets in the surface produced by normal faults with several hundred meters of vertical displacement, created as the subducting plate was bent out the outer rise (~100 km to the east, not visible in the cross-section).

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