Earthquakes & Tectonics of South America

Рет қаралды 14,880

5 жыл бұрын

This animation explores three major mechanisms for earthquakes in South America due to the interaction of the Nazca and South American plates. Western South America is a region of high earthquake hazard because of:
• Tsunami-generating megathrust earthquakes on the Nazca -South America plate boundary,
• Major earthquakes within the subducting plate beneath populated coastal towns, and
• Major earthquakes on faults within the continental crust.
Directed by Dr. Robert Butler, geophysicist, University of Portland
Narrated by Dr. Wendy Bohon, Education Specialist, IRIS
Animation by Jenda Johnson, geologist, Earth Sciences Animated
Music, “Crystal Skies” from “Forgotten Dream” (used with permission from Sean Koreski; www.beautifulflute.com)

Пікірлер: 15

@annapawww12568 Ай бұрын

Great explanation in such a short time, thank you!

@Ellensburg44 5 жыл бұрын

Excellent!

@veronicalogotheti5416 Жыл бұрын

Thank you

@Lucassogos Жыл бұрын

6:57 I had a grandfather who died in 2021 who was born precisely on the day of this earthquake!

@JimInYamaguchi 5 жыл бұрын

Great! Is there a technical difference between _earthquake-resilient_ and _earthquake-resistant_ structures, or is _earthquake-resilient_ used generically?

@IRISEarthquakeScience 5 жыл бұрын

Ideally structures in earthquake country should be built to earthquake-resistant standards. Unfortunately, many structures predate building codes that require engineering for earthquake shaking. Earthquake resilience includes not only the ability to prepare for and withstand an earthquake, but the ability to rapidly recover from the disruption of infrastructure and adapt to changing conditions.

@IRISEarthquakeScience 5 жыл бұрын

P.S. Chile has done a remarkable job of replacing buildings with earthquake-resistant structures and they are impressively resilient!

@JimInYamaguchi 5 жыл бұрын

@@IRISEarthquakeScience, thanks for the explanation. But it still doesn’t answer my question (at least, not clearly): Is there a technical difference between earthquake-resistant and earthquake-resilient (i.e., is _earthquake-resilient_ a new class of building able to withstand earthquake damage)? I ask because I live in a subduction zone, and building codes here have been changing to reflect lessons learned, first from Northridge 94/Kobe 95, but especially Tohoku 3-11, and I'm wondering whether I need to be aware of a new term for a new category of aseismic function. For instance, buildings with seismic dampers might fall into this new category, but base-isolated structures not; or the emphasis in resilience could be on, not so much the structural integrity aspect but, as you wrote above, the ability to function while lifelines are still out and recover post-event.

@denasmith1977 3 жыл бұрын

@@JimInYamaguchi I could be totally wrong, but what I got from their response is that 'people' and a community can be earthquake resilient, but buildings should be built to be earthquake resistant. The change in terms being relative to the 'proper noun' type (in other words. is it people? or a thing?) Again, I could be wrong, but that is what I understood from it.

@tamekkaknuth9612 Жыл бұрын

Hello 😊

@MrRocambolesco 5 жыл бұрын

Really nice and exhaustive video. It'd be better if you could add some references or bibliography at the end of the video or in the description.

@IRISEarthquakeScience 5 жыл бұрын

The starting point for research leading to our regional animations has been the book "Active Faults of the World" by Robert Yeats (Cambridge Press 2014). In addition, we study US Geological Survey and professional journal articles, especially recent publications, for more detail.