Tsunamis and earthquake thrusts

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In summary, the conversation discusses the relationship between earthquakes and tsunamis, highlighting that not all large earthquakes in the ocean will produce a tsunami. The depth, location, and amount of stored elastic energy in the crust also play a role. The conversation also references an interesting video that explores the variations in tsunami height and mentions the recent Chilean and Sumatran earthquakes as examples. The earthquake off Banda Aceh was a powerful magnitude 9.1 event that caused a tsunami of only 2 meters. The conversation concludes with a link to more information on recent Indonesian earthquakes.
  • #1
Astronuc
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I came across an interesting video on three massive earthquakes and the thrusts that caused tsunamis.


Just because an earthquake is large, i.e., mag 7 or mag 8 or greater, and in the ocean doesn't mean it will produce a tsunami. It does depend on the depth and location as well, and how much elastic energy is stored in the mass (or volume) of crust, and the displacement.
 
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  • #2
Hi Astronuc

interesting video describing why there are variations in tsunami height

from what I have so far read, this latest Chilean event produced a tsunami of only ~ 2 metres ( fortunately!)

Would have been good to have seen what reasons they had considered specifically for the Sumatran event

cheers
Dave
 
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1. What causes tsunamis?

Tsunamis are typically caused by underwater earthquakes, landslides, or volcanic eruptions. When these events occur, they can cause large amounts of water to be displaced, resulting in a powerful wave known as a tsunami.

2. How are earthquakes measured?

Earthquakes are measured using a scale called the Richter scale, which measures the amount of energy released by the earthquake. Another scale commonly used is the Modified Mercalli Intensity Scale, which measures the intensity of shaking at a particular location.

3. Can tsunamis be predicted?

Currently, there is no reliable method for predicting when or where a tsunami will occur. However, scientists are constantly studying and monitoring seismic activity and ocean conditions to improve our understanding and ability to forecast tsunamis.

4. How do earthquake thrusts affect buildings?

Earthquake thrusts, which are sudden movements of the Earth's crust, can cause significant damage to buildings and other structures. The severity of the damage depends on the strength of the thrust and the quality of the building's construction.

5. What can be done to prepare for tsunamis and earthquake thrusts?

There are several steps that can be taken to prepare for tsunamis and earthquake thrusts. These include creating evacuation plans, building structures that can withstand seismic activity, and having emergency supplies and communication plans in place. It is also important to educate the public about proper safety procedures in the event of a tsunami or earthquake.

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