- #1
In summary, the conversation discusses the concept of "supershear" and the potential for strike-slip faults to generate large tsunamis. The article notes that the San Andreas and Gulf of Aqaba share a similar risk, but not the mid-Atlantic ridge which is a spreading center. The conversation also includes a link to a website with more information on the topic.
- #2
Twigg
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My background in geophysics is weak, but I have a couple questions.
"Supershear" means the peak velocity of the slip is greater than the S-wave speed (but less than the P-wave) speed, right?
Also, the article notes that the San Andreas and Gulf of Aqaba share a similar risk. Why not the mid-Atlantic ridge? Are there no regions on the Atlantic coast with the right geometry to generate tsunamis via this mechanism or do the earthquakes have to be closer to the bay? Or do supershear earthquakes not occur in the mid-Atlantic?
"Supershear" means the peak velocity of the slip is greater than the S-wave speed (but less than the P-wave) speed, right?
Also, the article notes that the San Andreas and Gulf of Aqaba share a similar risk. Why not the mid-Atlantic ridge? Are there no regions on the Atlantic coast with the right geometry to generate tsunamis via this mechanism or do the earthquakes have to be closer to the bay? Or do supershear earthquakes not occur in the mid-Atlantic?
- #3
Tom.G
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The mid-Atlantic Ridge is a spreading center (moving apart at 2.5cm per yr.), not a region where the tectonic plates are sliding past each other, as they are
around the Pacific Ocean.
You might find this site interesting:
http://portal.gplates.org/#SEAFLOOR
Cheers,
Tom
around the Pacific Ocean.
You might find this site interesting:
http://portal.gplates.org/#SEAFLOOR
Cheers,
Tom
- #4
davenn
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They are a good mix of both. The spreading ridge is sliced up like a loaf of bread with dozens ( probably 100's ) of transform ( strike-slip ) faultsTom.G said:
here's just a quick section out of Google Earth. ALL those horizontal lines are transform faults chopping up the MOR
FAQ: How Slip Faults Lead to Massive Tsunamis
What are slip faults?
Slip faults are fractures in the Earth's crust where two blocks of land move in opposite directions, causing a displacement of the ground. This movement can be caused by tectonic forces, such as the shifting of plates, or by human activities, such as mining or drilling.
How do slip faults lead to massive tsunamis?
When slip faults occur underwater, they can cause a sudden displacement of water, resulting in a massive wave known as a tsunami. This displacement can be caused by a sudden release of energy, such as during an earthquake, or by a submarine landslide triggered by the movement of the fault.
What factors determine the severity of a tsunami caused by slip faults?
The severity of a tsunami caused by slip faults depends on several factors, including the magnitude and depth of the earthquake, the length and orientation of the fault, and the characteristics of the seafloor. The shape and size of the coastline can also play a role in amplifying or reducing the impact of the tsunami.
Can slip faults be predicted?
While scientists can identify areas where slip faults are likely to occur based on past geological activity, it is not currently possible to predict when or where a specific fault will rupture. However, ongoing research and monitoring can help to better understand and prepare for potential tsunamis caused by slip faults.
How can we mitigate the impact of tsunamis caused by slip faults?
There are several measures that can be taken to mitigate the impact of tsunamis caused by slip faults. These include early warning systems, evacuation plans, and building codes that take into account the potential for tsunamis. Additionally, ongoing research and education can help to increase awareness and preparedness for these natural disasters.