Harold Tobin - Megathrusts and Splay Faults: Investigating Sources of the Next Cascadia Earthquake
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- čas přidán 21. 07. 2024
- Harold Tobin | March 29, 2024
Harold Tobin - University of Washington - delivers this lecture to CWU Geology Department. Central Washington University. Ellensburg, Washington, USA.
0:00 Livestream Begins
9:58 Nick Starts
14:41 Harold's Lecture
1:10:53 Q & A
My wife and I live in Anchorage, and there's some pretty amazing stuff still left here from the 1964 earthquake.
Along a river, there's an old road with dozens of 50s and 60s cars buried in the mud along the banks of the river
Splay faults ! A new one for me, but every day is a school day, thank you Harold Tobin and Nick Zentner !
Drove over from the West Side for this lecture. It struck me as 300-400 level content and I only took Geo 101 some forty odd years ago (at Central), but my brain didn't hurt too much trying to keep up. Regardless, it is very invigorating being in such an outstanding learning environment.
Caught up on CZcams .... been a busy few weeks around here. Loved the talk but need to watch again when I am less tired. LOTS of information flowed past and I wasn't able to catch it all on the first try. Thanks, Nick-the-Famous-in-Japan!
Watching recording from the shadow of Mt. St. Helens, Ridgefield, WA. Thank you so much for this presentation.
Outstanding work and super interesting. Thanks Prof. Tobin.
Nick, hello from Cannon Beach. Harold's presentation was absolutely riveting. Much thanks to his graduate students for their amazing work!
Excellent talk.
Thank you Harold Tobin and Nick Zentner, wow oh wow, a lot of this was new to me but fascinating. I am going to have to watch it again and again and try to blow up the maps a bit. What a dynamic speaker you are, thanks to a great team who obviously works well together. I hope you get the funding you need to finish this up. I hope you will come back. Thanks so much.
Thank you, dear nick ❤🎉🎉🎉
Woo, I enjoyed the excellent talk by Harold Tobin, thank you very much for hosting him, Nick, the CWU geology department!😃✨💞💗✨ Young viewers, those students sitting in the auditorium could be you, I hope you see that!!😉💫
YT unsubscribed me 😤 I just realized it .. Can't wait to watch this video. I need to call it a day now. 📣 Goodbye, Day...
Always amazing stuff Nick.
I missed the live stream but i watch you on utube. Thanks for all your videos. From Maupin Oregon ❤
That was one super lecture.
Hey nick, have you thought about making a playlist of these Friday presentations?
Great presentation style by Harold (voice, intonation, pacing) Very listenable. 🙂
I would love to be a student at CWU. While there I would be so keen to be helping Nick do his research into the Spokane flood hypothesis. My goal would be to return to Australia to look for ice age remnants in the landscape here.
A terrific presentation by Harold Tobin. Thanks Nick for posting these on CZcams! The only critique I would lodge is when observing it on CZcams, it would be best to have a pointer device such as the LogicTech Spotlight device for example.
Nice to see that the Olympics are getting a new look. Fascinatingly complex area. Good talk, though way fast, hi hi.
Sorry to miss the live. Thanks to the professors.
Great presentation and lecture!!!
I’d like to recognize the donors who helped to pay for the speakers…
❤❤❤ Thank you guys!
Yes, I would have like to have seen where Dr. Tobin was pointing the stick, but viewing after the live-cast, I was able to Pause, Rewind, and Zoom into the details of the slides and mostly relate to the features that he was talking about from context. Amazing details of fine structures in the active and inactive parts for the accretionary wedge.
Broad-scale illustrations of the accretionary wedge make it seem like a homogenous mass of turbidities, but the detailed structures shown by the linear scans tell a much different story, and those differences may have significant effects on the on-shore seismic damage and inundation that were seen on various parts of the coast after the Tohoku quake in 2011.
It would be so great to be on the cutting edge of this kind of field research. I would be running all over the exposures yelling, “Wow! Look at this stuff! What are the rocks saying here?”
Thank you for sharing this talk!
Really nice talk, looking forward to hearing more about the topic.
Thank you! Grasping some weird ideas applying concepts maybe to N Madrid & ETSZ. Dont know if imagery available to get deep enuf but failed rifting we know, and sounds like at least at 1 time conditions similar. No idea how to get old enuf nor new enuf info but hmmmm.
Fascinating stuff! Thank you.
If I ever make it to Ellensburg, I may not be able to visit CWU or one of the lectures, but I'd certainly stop at Vinman's. 😀
Thank you Nick for sharing this new-data presentation. My cut ‘n pasted question for Dr. Tobin was, “WHAT IS THE NORTHEASTERLY VECTOR MECHANISM (AS SHOWN IN YOUR DIAGRAM) OF THE WHOLE JDF PLATE, AS THE PACIFIC PLATE MOVES WNW, THE JDF TRANSFORM FAULTS PROJECT THE JDF TO THE ESE AND THE NA PLATE CONVEYS SW?”
The South Gorda plate section is showing strong evidence that it alone is accommodating the collision with the San Andreas Terranes (Yolla Bolly, Franciscan and Salinian.) There is no evidence of plate distortion related to a Northeasterly force anywhere North of the South Gorda plate.
Yeah I also wanted to know how the translational sheering impacts this subduction zone. The data from seismic tomography and GPS motion seems to indicated that the net sheer motion itself seems to be related to NA crossing over the East Pacific Rise with the ridge system in the same effectively fixed frame as the Yellowstone hotspot so whatever mechanism for plate movement is going to be related to whatever forces are driving NA SW but knowing what is driving that motion is harder to gauge, globally most plate motion is thought to be related to slab pull but NA is experiencing some particularly dynamic tectonic forces so global averages might not be representative of this interface.
We are from Gladstone, Ore. but spend with winters in Quartzsite, Az.
Good presentation
Shear zone … looking at those rocks reminded me of the crazy stuff in Idaho
a day late in california thankfully remembeted 5x5
On the title slide... Where is that? Would love to know so I might visit in the future.
They said in the talk that it is lake of the gods Olympia National Park. Sadly the area is so remote that you would need permission to get a helicopter ride up into the high Olympic ranges at the feet of the glaciers so if you were going on foot you would need to vertically climb mountains and traverse glaciers to get there.
Nick, a question please: do you know if Vic Baker's " Ice Age floods around the world" has been published. Curiously, Australia experienced ice age floods which created a string of lakes which terminated in Lake Mungo, New South Wales, the site where the remains of ancient indigenous ( aboriginal) were discovered among the lake side dunes.
Hi all, in replay
Splay faults, pizza boxes.
Running late too. Finically here.
Was there any chat associated with this? How do I see it?
The chat usually shows up a couple of hours after the stream has ended. If it is not there, come back a little later and there should be no problem.
From here on out it's "Geology Nick" ... lol
Warden, belatedly
Appreciated, thank you!