Olivia Walker
I am PhD student working in the 3D Seismic Lab at Cardiff University. My research is focused on the opening of the North Atlantic Ocean.
Location Cardiff
Activity
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@ChristineThompson Yes indeed as population is increasing we are occupying more and more land that is encroaching on certain natural hazards e.g. volcanic lowlands and flood plains
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That's right @MoiraShearer Monitoring does take place for regular events which helps collect data to help with mitigation! Similarly, predicting more extreme events is also done by the gathering of as much data as possible, (of often regular events e.g. ground tremours)!
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Olivia Walker replied to Lee Scott
Welcome @LeeScott We hope you find this course enjoyable!
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Olivia Walker replied to IAIN C. McLEAN
@IAINC.McLEAN Thank you for your kind words, we are really glad you enjoyed it!
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Olivia Walker replied to J Leech
Hi @JLeech Thanks to you for your contributions to the many discussions over the past 3 weeks. We are really glad you enjoyed the course! Glad to hear you benefitted from both sides of the engagement, it really is great to have these discussions!
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Olivia Walker replied to Rosemary Norton
Hi @RosemaryNorton Thanks for your contributions during the course. We are so glad to hear you liked every topic! Best wishes on your learning!
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Olivia Walker replied to Elizabeth Darby
@ElizabethDarby Thank you and we are glad to hear you found the course content interesting. Yes indeed Snowball Earth is truly remarkable topic!
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Olivia Walker replied to Renate R
Thank you @RenateR We are glad to hear you have enjoyed the course!
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Olivia Walker replied to Christine Thompson
I'm glad to hear that @ChristineThompson Best Wishes!
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Olivia Walker replied to Brian Glover
Hi @BrianGlover We are really glad to hear you have enjoyed this course, indeed it is incredible to see so many different varied discussions taking place. Best wishes
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Olivia Walker replied to Brian Glover
Hi @BrianGlover I am so pleased to hear you have found that all of your questions were answered, either by one of us or by the amazing contribution and discussion by all of of the students!
I will bring this information on to the course convenors about future courses. Thank you -
Olivia Walker replied to Emma Gregory
Hi @EmmaGregory It is great to hear you have found each of the modules of this course fascinating!
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Olivia Walker replied to Anne Lüneburg
Hi @AnneLüneburg I am so glad to hear you have enjoyed the course!
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Olivia Walker replied to Linda Cooke
Hi @LindaCooke I am glad to hear you have increased your knowledge on these subject areas, I hope you have enjoyed the course!
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Olivia Walker replied to Michael Allen
Yes indeed @MichaelAllen , take a look at this article about the risk of an asteroid impact in 2068 https://www.extremetech.com/extreme/316690-nasa-asteroid-could-still-hit-earth-in-2068
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Olivia Walker replied to Rosemary Norton
Hi @RosemaryNorton
I hope you are enjoying the course!
Regarding the measurements of according to NOAA there have been scales in the past to measure the intensity of tsunamis but they are no longer used, instead tsunamis are measured by their height at the shore and the maximum runup of the tsunami waves on the land. The amplitude is estimated by the size... -
Olivia Walker replied to Shazz J-E
Hi @ShazzJ-E
I will try my best to answer some of these questions :D
The difference I believe between rogue waves and tsunamis is that tsunamis are a series of waves caused by a landslide/volcanic/eruption/earthquake/meteroite hit etc.. they rise in height as they approach and eventually reach the shoreline, my knowledge of rogue waves are limited but I... -
Olivia Walker replied to Maria Grigg
This sounds extremely powerful @DrArathiR Do you have a name or any additional info for this documentary? Thanks
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Olivia Walker replied to Michael Smith
Hi @MichaelSmith That is a brilliant story to share about your learnings from the Pro-Darwinian nun. I am so glad to hear that from the course you have learnt more and your curiosity has been piqued. Good luck exploring!
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@TrishCarter Agreed. Although, there is more willingness to encourage, acknowledge and accept new hypotheses in modern time in the scientific community , there are still many instances where groups are not willing to accept for many different reasons, lack of undeniable evidence just being one.
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This is a very interesting read thank you for sharing @MartinConstantinides !
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Olivia Walker replied to Nat Harrod
Yes @NatHarrod This is very interesting indeed. According to one article the cement used by the Byzantian builders of the Hagia Sophia had earthquake resistant properties....
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This is very interesting indeed @YvonneWilliams Thanks for sharing!
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Thank you for sharing this link @FrancesTogneri There are certainly some interesting stories on this list!
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Thanks @AnnettePayling for these stories. I really like the story of Finn McCool and Giant's Causeway
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Hi @BrianGlover I am glad that this course has taught you new things and really made your brain tick. I look forward to your comments next week :)
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Hi @AlisonGilchrist I couldn't agree more about human perspective, we are so small! :)
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That's great to hear @MichaelSmith There is a lot of information to take in each week, I look forward to hearing your comments next week.
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Da chi, I am glad there are lots to think about! I look forward to next week @AlunPrice-Davies
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Olivia Walker replied to Martin Bishop
Yes it does, Thanks for sharing this @MartinBishop It is a really interesting article
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Olivia Walker replied to Glenn Stott
Yes, I saw this one too as a recent magnitude 8.1 earthquake!
https://www.usgs.gov/news/kermadec-and-new-zealand-earthquakes
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Olivia Walker replied to Rosemary Norton
Hi @RosemaryNorton Thanks for your question! The moment magnitude scale is used for all quakes by most authorities, and that is because it can measure more accurately 'megaquakes' as well as the other sizes.
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Olivia Walker replied to Susan Fenwick
Hi @SusanFenwick This is a great question! Yes the Moment Magnitude Scale is the standard sale used by lots of of seismological authorities! e.g. USGS Although I am not an expert, The moment magnitude scale is useful because it measures the total moment release of an earthquake (moment is the distance a fault moved and force required to move it). Moment...
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Olivia Walker replied to J Leech
Hi @JLeech This article by national geographic is clear and extremely detailed! Good find! Please let me know if there are any specific questions about the mantle I can try and answer for you!
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Thank you for sharing this @HowardHarris from your visits to Northern Spain!
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That is a great choice @GaryPritchard A truly exceptional looking volcano.
https://www.youtube.com/watch?v=wqxnJQcQXssHere is a video of a 2019 eruption!
You are lucky to be able to visit this every year,
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Thanks @MarkSelby for such a detailed overview of the Izmit earthquake. Here is a video to show how it affected the people living near by! (as posted by other mentor earlier)
https://www.youtube.com/watch?v=OBFw2zk_Xvo -
Hi @EvaLawrence Yes you have chosen a recent earthquake that was truly devastating! It was felt all over central and eastern Nepal and into India and Bangladesh. It resulted in the deaths of approximately 9000 people.
You are right, in terms of geology it was the result of thrust faulting during subduction of the Indo-Australian plate under the Eurasian...
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Thank you for sharing from New Zealand @HenrietteBadenhorst I have just read about this complex earthquake, researchers say the earthquake involved 12 separate fault ruptures. Wow!
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Olivia Walker replied to Arkar Kyaw
Thank you very much @ArkarKyaw for sharing this information on Myanmar! Myanmar experiences a lot of earthquakes e.g. a quick google search says a magnitude 4.4 earthquake affected Myanmar on the 30th April.
Thank you for sharing this information and the devestating effects of loss of life from these extreme events.
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Olivia Walker replied to Peter Oxley
Thank you for sharing @PeterOxley from the Bahamas
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Olivia Walker replied to Yvonne Williams
This is a great memory @YvonneWilliams I always like to hear about these events in Wales!
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Olivia Walker replied to Daniel Byrne
Thank you for sharing @DanielByrne on the recent experiences in Northern Ireland!
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Olivia Walker replied to Peter Oxley
@PeterOxley This is a great question! You are right the 5 largest extinction events were responsible for the loss of more than 75% of animal species. Please see this PDF for a little overview of them. https://www.nationalgeographic.org/media/mass-extinctions/
I think these events can certainly be classed as extreme, because of their wide reaching and...
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Olivia Walker replied to J Leech
That's great to hear @JLeech
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Olivia Walker replied to Linda Cooke
I'm glad to hear it @LindaCooke
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Olivia Walker replied to Shazz J-E
I am glad to hear that @ShazzJ-E This week will be anotehr very thought provoking week indeed!
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Olivia Walker replied to Helen B
I hope you feel better soon @HelenB Please take your time!
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Olivia Walker replied to Patricia Cook
Welcome @PatriciaCook and congrats! I hope you enjoy this course
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Olivia Walker replied to Abdulkadir Usman
Welcome @AbdulkadirUsman That is great I hope you enjoy!
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Olivia Walker replied to Jodie B-H
Welcome @JodieB-H I hope you enjoy it!
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Hello all :) I hope you are enjoying the course despite it surprising you in its topic direction. What I must urge as a geologist myself is the Cambrian Explosion has everything to do with geology! It is something all geologists are taught about at the very beginning of their training. The Cambrian Explosion documents the emergence of pioneer species through...
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@annitariddle Yes indeed, there are plenty of brilliant resources out there regarding these topics!! Thank you for pointing out some of them.
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I agree @RobCann It is truly a combination of so many rare (and in some cases extreme) events happening at the "right time" that has led us to where we are today!
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Glad to hear it @HowardHarris . I hope you enjoy it!
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Thanks @DavidWebb for many of your great comments. I hope you enjoy next week.
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@LindaCooke Thank you for your feedback Linda. Perhaps there will be more material you expected put forward next week, but I am glad to hear you are finding it fascinating
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Great @PeterOxley ! I hope you enjoy next week
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Thanks @PeteB for all of your great comments and overviews. You have really engaged in this course so far and are showing your previous knowledge! I hope you continue to learn more things in the coming weeks
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I am glad you have enjoyed this week @HelenB and I hope you enjoy next week just as much!
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Yes @ElliotBowe and @ShazzJ-E this is very interesting indeed and something I think you could ponder on for a long while.. We are estimating in the constructs we as humans deem possible/what has been proven thus far
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Olivia Walker made a comment
Some really great comments and summaries below.
Please continue (if you wish) to add your own. Sometimes it helps to gather your thoughts by writing them down, I am enjoying reading them. well done! -
Olivia Walker replied to David Webb
Hi @DavidWebb Thank you for such a great answer. I really like the way you have described the conditions on earth.
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Hi @JohnLateano There are two types of crust on earth. Continental crust and Oceanic crust, it is due to the recycling and replenishing of the ocean crust through plate tectonics (subduction, and sea floor spreading) that we get our oceans. Key minerals and fluids from the mantle are released during these processes that help replenish the world's oceans and...
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@StefanoPogliano Hi Stefano, thank you for picking this up. I will flag it for the course leader to correct.
I believe that it should be that the sun is the central star of our Solar System. Our solar system is one of many planetary systems that orbit our galaxy (The Milky Way). So, as our sun is the centre of our solar system and our solar system (like...
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@MichaelAllen I agree, it is most definitely due to the combination of several well timed circumstances that life can exist on earth.
Here is a good read on Marspublished recently on the national geographic!
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and more to come @FrancesTogneri !
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I am so glad to hear that @ShazzJ-E
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Olivia Walker replied to Laura Long
@LauraLong I agree with this, it is all about perspective and scope! As the population grows and demand for space increases we might be becoming closer to the risks posed by these hazards!
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Olivia Walker replied to Arkar Kyaw
Thanks @ArkarKyaw for your thoughts on this. Perhaps, when looking from the human race perspective we could argue that many more events can be classed as extreme as the population grows and these smaller events are monitored and 'felt' by more people.
Similarly, some earthquakes and tremors can be indicative of larger seismic events that are imminent!
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Good question @Ríobárd(Rob)StuartWilliams I think it all depends on scope and perspective when classifying an event as extreme.
A rare event that has a devastating effect on, for example, a particularly species in a local region can be classed as extreme for that species and has a direct affect on the species in the region but perhaps would not have a significant... -
Olivia Walker replied to Pamela C
@PamelaC That's right. This is an active volcano with many 'similar' eruptions!
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Olivia Walker replied to Annette Payling
@AnnettePayling You are right, some volcanoes erupt regularly and an event like this for Etna is relatively common and not considered extreme. You are also right about many people not understanding the dangerous aspects of volcanic eruptions!
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Olivia Walker replied to Rosemary Smythe
Welcome Rosemary, I hope you enjoy this course!
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Olivia Walker replied to Lex Muusse
Hi Lex, I am glad you have chosen this course to broaden your knowledge! It is indeed an exciting subject!
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Olivia Walker replied to Helen B
Hi Helen and welcome!
I hope you enjoy this course as you have other FL courses :) -
Olivia Walker replied to Laura Long
Welcome Laura,
Great to hear about your interested in environment and climate change. I hope this course also interests you, come of these extreme geological events are on the increase due to climate change! -
Olivia Walker replied to Hamish Morrison
Hi Hamish, This course is history indeed, geological history of hundreds of millions of years! I hope you enjoy it and it keeps you ticking over during lockdown.
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Olivia Walker replied to Michael Allen
Hi Michael, I am glad to hear you are broadening your knowledge areas and I hope you will enjoy this course
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Olivia Walker replied to Humaria Khadim
Hi Humaria, Glad to hear of your intentions and I hope the course is what you are looking for :D
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Olivia Walker replied to Thomas Horseman
Hi Thomas. Welcome to the course, I am glad to hear of your goal to be a geologist! I hope you enjoy it and feel free to ask questions!
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Olivia Walker replied to Arkar Kyaw
Welcome Arkar, I'm glad to hear of your goal to become a geologist!
I hope you enjoy the course :) -
Olivia Walker replied to John Lateano
Hi John and welcome! I am glad you are continuing your interest in the Earth Sciences. More to come on super volcanoes and tectonic plates!
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Olivia Walker replied to Rey Juzou
Welcome Rey, I am glad you found this course! I hope you enjoy it and feel free to ask questions!
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Welcome Martin, Glad to hear you have chosen this course. I am sure you will enjoy it!
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Olivia Walker replied to Patch Lowsley
Hi Patch, I too agree that lockdown has shaped new perspectives! With wonderful geology at your doorstep on the south coast I hope you can explore more of this. I hope this course is what you are looking for :D
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Olivia Walker replied to Howard Harris
Hi Howard and welcome to the course! It is great that you are expanding your interest area and I hope you enjoy it!
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Olivia Walker replied to Richard Potter
Hi Richard, This course seems perfect for you! Glad to hear you are topping up on your knowledge and hope you enjoy
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Olivia Walker replied to Julie Henry
Hi Julie, and welcome! I am glad to hear that you are interested in Earth Sciences, as it is an accessible one that can be explored from your doorstep! I hope the course ignites more interest in you :)
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Olivia Walker replied to Claire S
Hi Claire and welcome! What a great segway into geological hazards, I hope you like the course!
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Olivia Walker replied to Pete B
Welcome Pete, Glad to hear you have been eagerly awaiting this course! I hope you enjoy it
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Olivia Walker replied to Brian Eagar
Hi Brian and welcome to the course! I know I would be interested to hear more about your volcano adventures, there will be a chance later in the course to share some details if you wish :)
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Olivia Walker replied to Melissa Lee
Hi Melissa and welcome to the course! great to see you are widening your scope of geology. Hope you enjoy!
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Olivia Walker replied to Shazz J-E
Hi Shazz, welcome to the course and glad to hear you are keen to keep your knowledge topped up! I look forward to future discussions :D
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Olivia Walker replied to Sajid Sharif
Welcome Sajid!
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Olivia Walker replied to Maria B Tukan
Hi Maria, I am so glad you have chosen this course to widen your scope of geology! I hope you like it!
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Olivia Walker replied to Ben C
Hello Ben and Gary. Myself and Roberto will be active throughout the course so please do stay on whilst it is running! We will be answering any questions you have and encouraging discussion!
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Welcome Rob! Sounds great! I am sure you will love the course, and you will have opportunity to share some florida experiences later in the course :)
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Olivia Walker replied to Brit Martin
Welcome Brit, volcanoes is coming soon!
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Olivia Walker made a comment
Welcome to the course! So great to see so many people participating. My name is Olivia and I'm a PhD student at Cardiff University and a mentor for this course! My PhD is on the opening of the North Atlantic Ocean. I can't wait to interact with you during the course and please feel free to ask questions and we encourage discussions!
