Reflectors By Alexander B Snyder The New Madrid Seismic Zone Responsible for a huge series of earthquakes from 18111812 Contains layers and layers of sediment that needs to be studies in more depth ID: 383942
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Slide1
Using Autocorrelation to Identify Reflectors
By Alexander B. SnyderSlide2
The New Madrid Seismic Zone
Responsible for a huge series of earthquakes from 1811-1812
Contains layers and layers of sediment that needs to be studies in more depth
Large Earthquakes in this area could cost:$300,000,000,000!Slide3
What are ReflectorsSlide4
Snell’s LawSlide5
Why?
Knowing these sediments will better help us identify with better precision which areas are at increased risk for high magnitude earthquakes
Think
Jello
versus IceSlide6
Common Misconceptions
There are many layers between the crust and the mantle
The crust-mantle boundary (
MoHo
) is not always easy to find
Most of what we know about the mantle is from seismogramsSlide7
Equipment
Thank you Earth Scope
And the NSF!!!Slide8
Autocorrelation
A function that evaluates how similar
a seismogram
is to itself
Reveals patterns within the seismogram
These patterns are from ambient noiseSlide9
Finding the Reflectors
Once I correlate the large amount of data, I put it all together through stacking
The more data
I have, the
more obvious
the reflectors
areSlide10
Questions?