The Tortoise and the Hare: Slow vs Fast Earthquakes
IRIS Distinguished Lecturer Dr. Gregory Beroza, Stanford University
OMSI Science Pub, Mission Theater, Portland OR (Nov. 13, 2012)
In the past decade, earthquake scientists have discovered a family of unusually slow earthquakes. These slow earthquakes occur in diverse geologic environments. Like ordinary earthquakes, they occur as slip on the same faults that host ordinary earthquakes, but they take a long time to unfold, such that they can be described as "slow." Their discovery was enabled by deployment of highly sensitive earthquake monitoring networks. Slow earthquakes are slow in a systematic way that leads us to define them as a new earthquake category in much the same way that astronomers categorized main-sequence and off-main-sequence stars nearly a century ago. Unlike ordinary earthquakes, which grow explosively in size with increasing duration, slow earthquakes, whether large or small, grow at a constant rate. They occur on the deep extension of large faults - a location that is "strategic" because it adjoins the part of the faults that generate the more familiar, and dangerous, "ordinary" earthquakes. Slow earthquakes have the potential to trigger large earthquakes. For this reason alone they merit intense study. Their recent discovery also points out that there is much still have to learn about earthquakes, and that earthquake science is a field where fundamental discoveries can be expected.
OMSI Science Pub: http://www.omsi.edu/sciencepub
Видео The Tortoise and the Hare: Slow vs Fast Earthquakes канала IRIS Earthquake Science
OMSI Science Pub, Mission Theater, Portland OR (Nov. 13, 2012)
In the past decade, earthquake scientists have discovered a family of unusually slow earthquakes. These slow earthquakes occur in diverse geologic environments. Like ordinary earthquakes, they occur as slip on the same faults that host ordinary earthquakes, but they take a long time to unfold, such that they can be described as "slow." Their discovery was enabled by deployment of highly sensitive earthquake monitoring networks. Slow earthquakes are slow in a systematic way that leads us to define them as a new earthquake category in much the same way that astronomers categorized main-sequence and off-main-sequence stars nearly a century ago. Unlike ordinary earthquakes, which grow explosively in size with increasing duration, slow earthquakes, whether large or small, grow at a constant rate. They occur on the deep extension of large faults - a location that is "strategic" because it adjoins the part of the faults that generate the more familiar, and dangerous, "ordinary" earthquakes. Slow earthquakes have the potential to trigger large earthquakes. For this reason alone they merit intense study. Their recent discovery also points out that there is much still have to learn about earthquakes, and that earthquake science is a field where fundamental discoveries can be expected.
OMSI Science Pub: http://www.omsi.edu/sciencepub
Видео The Tortoise and the Hare: Slow vs Fast Earthquakes канала IRIS Earthquake Science
Показать
Комментарии отсутствуют
Информация о видео
16 ноября 2012 г. 21:41:21
00:52:03
Другие видео канала
![Crustal Inheritance and Arc Magmatism: Evidence from the Washington Cascades for Top-down Control](https://i.ytimg.com/vi/XpWLqlp88Fo/default.jpg)
![‘Nick From Home’ Livestream #46 - Slow Earthquakes](https://i.ytimg.com/vi/xHLRyqS94zY/default.jpg)
![Terrane Assembly & Lithospheric Modification Processes in Antarctica Using Magnetotellurics](https://i.ytimg.com/vi/mqsnMZeRYjo/default.jpg)
![Unraveling the Secrets of the Southern San Andreas Fault - Perspectives on Ocean Science](https://i.ytimg.com/vi/u6V5GQWKb0U/default.jpg)
![William Sager- The Largest Volcano in the World-Mid Pacific Ocean](https://i.ytimg.com/vi/8bhUEYNNr1Y/default.jpg)
![Natural Science - Mount Rainier](https://i.ytimg.com/vi/72Z2WeeISPY/default.jpg)
![Tectónica e historia de terremotos de Puerto Rico (2020)](https://i.ytimg.com/vi/3IrJ9zTmpFY/default.jpg)
![Dating the Ice Age Floods](https://i.ytimg.com/vi/3wKOVZKimwg/default.jpg)
![GAGE/SAGE Plenary Session: Behavior at and coupling across key Earth interfaces](https://i.ytimg.com/vi/OHYWkjRYplk/default.jpg)
![Remote Online Sessions for Emerging Seismologists (ROSES): Unit 11 - Gridding, Inversion](https://i.ytimg.com/vi/jCjTwUl17RY/default.jpg)
![Remote Online Sessions for Emerging Seismologists (ROSES): Unit 10 - Optimal Interpolation](https://i.ytimg.com/vi/czKLeHePujs/default.jpg)
![Social Media for Scientists](https://i.ytimg.com/vi/JwtZabNoZBc/default.jpg)
![Exploring Extremes of Earth's Magnetic Field - Perspectives on Ocean Science](https://i.ytimg.com/vi/pP88J_nzanE/default.jpg)
![GAGE/SAGE Plenary Session: New approaches to processing big geophysical and geospatial datasets](https://i.ytimg.com/vi/UE5MPi5aBhk/default.jpg)
![Slow Earthquakes](https://i.ytimg.com/vi/r9recENBhiU/default.jpg)
![Faulting California](https://i.ytimg.com/vi/QzdBx9zL0ZY/default.jpg)
![Postmodern Geophysics and Ice Age Climate](https://i.ytimg.com/vi/7oD3I7lYCRY/default.jpg)
![Geoscience Careers—Parts 1 & 2. What can I do with my degree in geoscience? So many things!!!!](https://i.ytimg.com/vi/RvPkVQ9hFLY/default.jpg)
![THE NEXT GREAT QUAKE • BRIAN HACKNEY REPORTS, WRITES, PRODUCES](https://i.ytimg.com/vi/3rcHlh7KiCg/default.jpg)
![Antillas Menores—Tectónica e Historia de Terremotos](https://i.ytimg.com/vi/oHfIOOvp3sA/default.jpg)