what we cant feel Celeste Labedz Massachusetts Institute of Technology Incorporated Research Institutions for Seismology Summer Internship 2014 What can ambient seismic noise give us Clues about the inside of the earth ID: 673457
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Ambient Seismic Noise:What we can learn fromwhat we can’t feel
Celeste Labedz
Massachusetts Institute of Technology
Incorporated Research Institutions for Seismology
Summer Internship 2014Slide2
What can ambient seismicnoise give us?Clues about the inside of the earth
A “telescope” for looking down
Earth’s structure
Earth’s historyEarth’s hazards
wikipedia.org
geo.arizona.eduSlide3
What does “seismic” even mean?Earthquakes!Movement of waves through the earthBig waves
L
ittle waves
Ambient seismic noiseSlide4
How do we get ambientseismic noise?Seismometers…LOTS of seismometers
usarray.orgSlide5
How do we turn ambient seismic noise into something we can use?Correlation between stations
Analyzing the correlations
wikipedia.orgSlide6
A plot of correlations:Slide7
How does seeing waves let us see inside of the earth?Seismic waves bend and bounceDifferent pathsDifferent
times
aeic.alaska.eduSlide8
The Big Idea:Look at the arrival times of seismic wavesFigure out the paths they tookTurn the paths into a model of the inner structure of the earth
Use the model to observe layers, subducted plates, hazard zones, and more