looking at the transverse to vertical phase, to find the Rayleigh wave (90 degree phase).
tried to run the radiometer on the data around 1.5 Hz, which seems to be coming from a direction about 68 degrees east of north. Find that radiometer gives 22 degrees north of east, which seems consistent. Some concerns: the data at this frequency has periodic turn ons/offs, so it may be local, in which case the waves would not be plane waves.
Looked at earthquakes too, but not ready to present.
Plan to present at the next meeting, will try to have some slides with applications to different data.
Parameter estimation for Rayleigh and Love (Pat)
Teleseismic events and Wiener filtering (Daniel, Michael)
Circulated a figure comparing power in Homestake and Pinon flat arrays. Up to 1000x better noise in the Homestake array at 2mHz, depending on the frequency.
Will use this for the methods paper, didn't see the very long periods in the Pinon Flats. Will use to demonstrate why Homestake data can reveal these periods.
Method paper is nearly done, will also write a results paper
Velocity from noise correlations (Daniel)
Pull together all velocity measurements to start making comparisons (all)
Homestake Array Summary paper:
Leads: Vuk, Gary, Victor
target: Seism. Research Lett., 6000 words, 10 figures.
Paper should be in a very mature state. Vuk will take another look, check emails from Gary, and if there are no issues will submit.
Active excitation overview paper
Leads: Gary, Ross
Others: Victor, Daniel,…
Will discuss at the next call.
Surface Active Excitation
Leads: Victor, Boise
Others: Gary, Ross
Plan to invite the Boise group to give us a presentation in Sep or Oct 2017, when they are ready with their paper.
Underground Active Excitation:
Lead: Gary, Ross
Parameter estimation for the Rayleigh and Love eigenfunctions (amplitude vs depth dependence).
Leads: Pat, Daniel
Also contributing: Victor, Vuk, Levi
Novel, but maybe insufficient for a publication. Could use the eigenfunction measurement for Rayleigh and assume something about Rayleigh field to make preliminary estimates of the Newtonian noise.
Estimating directional and modal composition of the seismic noise. (Pat, Levi, Vuk)
Leads: Pat, Vuk, Levi
Wiener filter application
Leads: Jan, Michael
Michael with check with Jan, there may be more work to be done on it before circulation.
Teleseismic EQs and near-surface scattering
Leads: Daniel, Victor
Time-variable velocity changes
Lead: Victor, not started yet
Very low frequency harmonics (Ross)
groups/homestake/meetings/20171018.txt · Last modified: 2017/10/18 11:34 by mandic