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| groups:homestake:meetings:20180118 [2018/01/19 11:34] – mandic | groups:homestake:meetings:20180118 [2018/01/19 13:43] (current) – pavlis | ||
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| Homestake Meeting Minutes, 01/18/18 | Homestake Meeting Minutes, 01/18/18 | ||
| - | Attending: | + | Attending: |
| Agenda: | Agenda: | ||
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| * Data corrections, | * Data corrections, | ||
| * Event catalog (Gary/Ross) | * Event catalog (Gary/Ross) | ||
| - | * Radiometer updates (Pat, Andrew) | + | * Radiometer updates (Pat, Andrew) |
| + | * Ran radiometer and simple phase beam-forming on 1.4 Hz transient feature. Observed the two methods to agree well. Expect it to be human-generated, | ||
| + | * At 1.5 Hz expect the wavelength ~3km, should see them underground as well, but we don't seem to. Is it possible that eigenfunctions are such that the amplitude is significantly lower? | ||
| + | * Ross: Could compare the blast events from this mine, and compare the waveforms on the surface and deep underground. | ||
| + | * Gary: good idea. | ||
| + | * Daniel: velocity of 2.8 km/s, implies this is surface wave... | ||
| + | * Vuk: could also look at distant stations to check locality of the effect. | ||
| + | * Gary: could follow up with Jaret. | ||
| + | * Pat: will try to add deep stations. | ||
| * Parameter estimation for Rayleigh and Love (Pat) | * Parameter estimation for Rayleigh and Love (Pat) | ||
| * Teleseismic events and Wiener filtering (Daniel, Michael) | * Teleseismic events and Wiener filtering (Daniel, Michael) | ||
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| * Others: Victor, Daniel,… | * Others: Victor, Daniel,… | ||
| * Draft of the paper exists, as a report for IRIS. Gary will be adopting it to a publication. Don't have a particular date in mind. | * Draft of the paper exists, as a report for IRIS. Gary will be adopting it to a publication. Don't have a particular date in mind. | ||
| + | * Gary is working on this, building figures and adding text. Could add a "live 3D" interactive figure, could add it to a paper, as a supplement. | ||
| * Surface Active Excitation | * Surface Active Excitation | ||
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| * Leads: Jan, Michael | * Leads: Jan, Michael | ||
| * Latest version: {{: | * Latest version: {{: | ||
| + | * Addressing comments from previous meetings, added an appendix including 0.1 Hz (which does not show bi-modality) and 0.4 Hz (which is more complex) - both as expected. Modified the coherence-vs-amplitude plot, including both Homestake and Sweetwater arrays. | ||
| + | * Trying to correlate with wave heights and dominant period of the wave. Made a movie trying to depict this - work in progress. Observe some correlation, | ||
| + | * Trying to find relevant metrics to depict this effect. | ||
| + | * Daniel/ | ||
| + | * Gary: the appendix could be turned into a supplement. | ||
| + | * Michael: maybe a supplement could be used to show the movie. | ||
| + | * Michael: Will talk to Jan about whether to include this in the paper or not. Guess that final fixes to the paper should not take long, expect in a couple of weeks to finalize the modifications. Can work with Victor and Daniel in person to speed up the process. | ||
| * Daniel' | * Daniel' | ||
| + | * Similar measurements to what Michael is doing, coherence on ambient noise. Get the same conclusions as Michael. Used also further stations as well. | ||
| + | * Michael: would a plot of this type help relate to the geophysics community? | ||
| + | * Daniel: Maybe, will get back to this. Will discuss with Michael/ | ||
| * Teleseismic EQs and near-surface scattering | * Teleseismic EQs and near-surface scattering | ||
| * Leads: Daniel, Victor | * Leads: Daniel, Victor | ||
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| * Very low frequency harmonics (Ross) | * Very low frequency harmonics (Ross) | ||
| + | * 3D PDF of Homestake geometry - draft for active source experiment paper {{: | ||
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