Notes

Slide Show

Outline

1	Volcanic Infrasound – Seismology in the atmosphere Jeff Johnson (University of New Hampshire / New Mexico Tech) EHaz Course Spring 2007 March 29
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4	Background and Terminology (1)
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6	Background and Terminology (2)
7	Deploying a CMG-40T seismometer, a semi-broad-band instrument, with response down to about 30 s.
8	Background and Terminology (3)
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10	Data Recording
11	Vertical-component, 1-hour, semi-broad-band seismogram from Santiaguito Volcano.
12	Vertical-component, 1-hour, semi-broad-band acoustogram from Santiaguito Volcano.
13	One-hour seismogram detail showing pyroclastic eruptive events and rock fall from Santiaguito Volcano.
14	One-hour acoustogram detail showing pyroclastic eruptive events, degassing events,and rock fall from Santiaguito Volcano.
15	200-s seismogram detail showing pyroclastic eruptive event from Santiaguito Volcano. Waveform was recorded ~700 m from vent.
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18	Volcano Infrasound Characteristics (1) - Spectrum
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21	Bandwidth and Filtering (1)
22	80 s seismic explosion event filtered in various bandwidths
23	80 s acoustogram filtered in various bandwidths
24	Bandwidth and Filtering (2)
25	Spectrogram for one hour vertical seismic trace Santiaguito time series.
26	200-s seismic spectrogram of pyroclastic explosion event from Santiaguito
27	Waveform Interpretation (1)
28	Waveform Interpretation (2)
29	Waveform (Infrasound) Interpretation (3)
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31	Background and Terminology (4)
32	Waveform (Infrasound) Interpretation (4)
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34	Waveform (Infrasound) Interpretation (5)
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37	Other infrasound applications (1) – Vent localization
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42	Other applications (2) – Eruption Monitoring
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45	Other applications (3) – Eruption Dynamics and Conduit Geometry
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48	Other applications (4) – Seismology of the atmosphere
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54	Acknowledgments: