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Ambient Seismic Noise: What we can learn from Ambient Seismic Noise: What we can learn from

Ambient Seismic Noise: What we can learn from - PowerPoint Presentation

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Uploaded On 2018-09-21

Ambient Seismic Noise: What we can learn from - PPT Presentation

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

seismic waves ambient noise waves seismic noise ambient org earth earth

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Slide1

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