Dr. Tiegan Hobbs

Dr. Tiegan Hobbs

@thobbsgeo.bsky.social

Researching earthquakes, active faults and seismic risk 🌎🫨 at the Geological Survey of Canada 🇨🇦 | Adjunct professor at UBC and UVic | Opinions are my own

145 Followers 89 Following 27 Posts Joined Feb 2025
4 months ago

Trying, but failing, to keep a straight face while discussing the “party pickle” in a meeting.

(Pickle is a file type in #seismology, and a party is the name for a group of detected #earthquakes in the software package we’re using).

0 0 0 0
4 months ago

Check out this new paper from my student Meg Patchett, understanding how emergency managers and first responders can use earthquake risk information in real time after a major event 🌎

1 0 0 0
6 months ago
Video thumbnail

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 🧪

12 3 4 0
6 months ago
YouTube
Pet Emergency Kit How to prepare an emergency kit for your cat or dog. For more information visit http://www.prepareyourself.ca

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

3 1 0 0
6 months ago
Post image

📣 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-...

6 3 0 0
6 months ago

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!

3 0 0 0
6 months ago

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

1 0 0 0
6 months ago
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.

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

4 2 1 0
6 months ago

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

18 4 2 0
6 months ago
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.

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

113 31 1 2
6 months ago

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

4 1 0 0
6 months ago
Post image Post image

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

96 24 2 2
6 months ago
Preview
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

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

132 50 2 3
6 months ago
YouTube
CAT5 Hurricane Erin's Bands Battering Puerto Rico, Impacts to Bahamas, East Coast, Bermuda Likely YouTube video by StormCenter Communications | GeoCollaborate

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...

101 37 5 2
6 months ago

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

9 3 1 0
6 months ago

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.

5 0 0 1
7 months ago
Video thumbnail

#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.

38 5 1 1
6 months ago
YouTube
Early View of Tracy Arm Landslide Features YouTube video by Alaska Earthquake Center

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! 🧪⚒️

45 21 1 3
6 months ago

What a success!

0 0 0 0
7 months ago

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

11 6 0 0
6 months ago

👀

1 0 0 0
6 months ago
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.

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

4 1 0 0
7 months ago
Preview
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/news/us-news...

6 2 2 1
7 months ago
Post image Post image Post image

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

0 1 0 0
7 months ago

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

2 0 0 0
7 months ago
A seismometer (yellow donut-shaped instrument) is suspended from a ships crane, off the side of the boat. It is visibly windy.

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!

1 0 0 0
7 months ago
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).

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...

17 11 3 0
7 months ago

Reposting because this is a gem and apparently I don’t know how threads work on Bluesky yet 🤷‍♀️

0 0 0 0
7 months ago

Landslide in Alaska caused a local tsunami and was detectable on the seismic network! No injuries or damage reported 👌

0 0 0 0
7 months ago
Post image

Need geology photos for your fall classes? Please check out my site Geologypics.com, which has >5000 of my images --all searchable and all for free download. And please share!
Just added 15 more including this one of Mt. St. Helens crater. #geology #EarthScience #teaching #scienceteaching

137 62 4 1