Good job Lulu. One thing I think that helps make a good presentation is, like Nick, to keep talking even when your back is turned or writing something, and never be afraid to admit that you don’t know something. You did well on both accounts. 👍
I enjoyed both presentations. Lulu's lecture was really interesting. It's great to see the upcoming talented geologists' research building on the shoulders of giants.
The film of the large pyroclastic flow was from Mt Unzen in Japan and taken on June 3rd 1991. World famous volcano photographers and scientists Maurice and Katia Krafft plus 41 others were killed. They were in the restricted zone. That film was shot by a film person several miles away.
Thank you for that on Mauriceand Katia. They were totally famous volcanologists when I was a kid. They seemed to take some terriblerisks but that was probably some exageration by the journalists covering them. Where I grew up there were old lava flows and cinder cones everywhere.
@@wendygerrish4964 I saw a documentary made by them and he was interviewed and said that dying while investigating an erupting volcano would be how he preferred to go; or something to that order, as I saw it several years ago.
Wow, I loved Nicks class, it answered a lot of questions for me, and Bravo LuLu, that was awesome, I knew nothing about those critters thank you for introducing us all to a scientific way to prove earthquakes and tsunamis do come along with volcanos.
Thank you Nick. I appreciate hearing from the grad students. Lulu did a terrific job! The idea that diatoms can give us a better idea of the range of a past tsunami is intriguing. Thank you Lulu.
I don't know how much experience Lulu has in presentations, but she did an excellent job. I had never heard of diatoms before, and I found it extremely interesting. Well done!
Lulu, thank you. Such interesting information to add to tsunami evidence. Family in Astoria, Long Beach, WA and Seaside so, many years of interest and concern about the BIG one. You've given me more to share with them. Best wishes on your Grad work. Congratulations, Tim!! Nick, I, too, still think of David Johnson and sadly waiting for word about him. Older now, I think how, happily excited he must have been seeing the spectacle and calling Vancouver that morning.
Looked at the eruption chart and everything seemed to have blown up 200 years ago, St Helen was marked as partial. Looking at frequency patterns the area should be free of explosions for several more hundred years.
Lulu, thanks for the bonus material. Personally enjoyed it. Nick, you know I always glean something from ya. If the borders ever open up to get you guys north of the 49, I’d heart to pick either of your brains over various things I see on my weekly commute from the coast to the Okanagan. I may know a distillery/brewery/ winery or two along that way we could have a discussion on the meaning of life (or various rock formations). Both amiable discussions in my books.
A message for Lulu - I thought your presentation was excellent. Before your presentation I knew enough about diatoms to be dangerous, but now the world is safer thanks to you. All joking aside, I was very favorably impressed. For example, I assumed that diatom skeletons were calcium, but now I know different and the difference is very important.
Fun fact: Some diatom shells have nonlinear optical properties that help the diatom gather light. These optical systems are only recently described, and have some properties that are better than classic lens systems. These are of interest to designers of nano scale sensors.
Yes crackling... That day... On your light blue shirt, the mic wire was pulled tight and out of alignment, and when you moved back n forth to black board was only time mic crackled. Wire was pulled out of alignment. Good save!!
Thank you Nick, for yet another great lecture. And congratulations to Lulu and Ben for their interesting additions. As for Tim: congratulations to you as well for being accepted as a grad student! Woohoo! \m/_
This episode has got me thinking about what series I want to binge on next. You mentioned some 2nd year classes like geomorphology. I checked into some online courses similar to this one. Not really a course. Just a fly on the wall. But I’d like to learn more. Can you suggest some other videos to continue learning about more geology? Geomorphology sounds interesting.
Nova did a special a couple of decades ago about the eruption of Mt Pinatubo, Phillipines, that includes some of the best footage recorded of lahars, as well as a day by day sense of how that event ramped up from lots of quakes to full on explosive eruption. Worth tracking down to view.
Nick, it may be interesting to speak to soldiers at Yakima Firing Center. They have trained two generations of soldiers in the ash fall of MSH. The dust in 1982 would hang in the air for up to an hour once disturbed. You can imagine what an infantry unit training under those conditions would have to endure..
Will try to join the live on Monday. I live on the north side of the Olympic Peninsula, and have lived out in the Westend (Forks). Should be interesting to learn more about what is under my feet. Also, earthquake early warning system now on line in Seattle/Puget Sound area. All over the news this week.
Hi Lulu, Since diatoms are in rainwater and the atmosphere, and thus is/has precipitates/d into your study areas, how do you distinguish between precipitated and tsunami deposited as they’re mixed together?
As Lulu said, different species live in different habitats. The freshwater ones, brackish water surfer types and the out and oceanic, high salinity tolerant ones. If the deep sea ones invade the normally freshwater habitat it’s an indicator of some catastrophic event like a tsunami
Mason Motormouth, you will definitely be a lawyer. Thank you for helping Eve. What kind of dog does she have? Ginger (see pic to left) says "Get well quick."
[start watching replay, see Nick talking but hear no audio] "Oh man, two streams in a row, he'll be really frustrated at this!" [notice that I forgot to turn my speakers on] "SONOFA..."
you know, i wonder if volcanoes like the cascades that have migrated and move, if the volcanoes emerge and integrate already existing mountains. but i have to wonder if the initial eruptions are more explosive or maybe begin in very explosive eruptions given the amount of foriegn material the magma conduits have to feed and melt into the initial diorite magma chamber. but just imagine a normal ridge given a chance at almost immortality compared to our lives of 2 million years till it moves again. idk interesting stuff
I've spoken to a few people who were near Mount Pinatubo when it sent the Lhar down back in the 90's! They said that they were on the edge of the Lhar and they barely got out the way as it was travelling very fast!
The doozy at Pinatubo was the pyroclastic flow. It came down the mountain and straight across Clark Air Force Base burying the runways under more than 20 feet of tephra. I have watched an interview with one of the Filipino seismologists who was on duty at the base that night, and she said it was absolutely terrifying to be in the control room watching the seismographs go off line one by one as the flow advanced. She said they knew it was time to leave when the front of the flow reached the perimeter of the base
What global climate events happened as a result of Mt Mazama? Around this time there was a transition of Northern European forests from Atlantic to sub-boreal and Egypt, previously wet was becoming dryer. en.wikipedia.org/wiki/Atlantic_(period)
He didn’t have St. Helens as a reference like we do. It was his life and home; he probably wasn’t terrified, I’ll lift my next drink to him. Some distant future archeologist will unearth a Pompeian mummy flipping the bird.😄
There's a lot wrong with anti-science people mouth-farting in public. It would be ok if just THEY wore the consequences of their bullshit, but in reality other people tend to suffer. Fig 1: COVID.
@@complimentary_voucher What’s the science behind a 3mm thick cotton or nylon fabric from stopping @1.4L of cough vapor @13 m/s containing virus particles @3 microns? The answer is it’s completely ineffective, and is only making the greater naive public blindly conform.
@@johnnash5118 As I recall the main importance of wearing this is that it retains water droplets which emerge when you breathe and speak. These droplets can contain lots of the virus which otherwise might have reached the person you're speaking to. So it is more a way to protect others than a way to protect yourself. But if we all wear protection we protect each other and help stop the spreading of the virus. It is a team effort and to me it is a small effort which I gladly make. Sorry if I made some language mistakes. I am a native Dutch speaker. ;-)
