Ambient noise station-correlation spectra for USArray stations

L13A-TA secondary stations.

H12A-TA H13A-TA I11A-TA J10A-TA J11A-TA J12A-TA J13A-TA K10A-TA K12A-TA K13A-TA
K14A-TA L12A-TA M10A-TA M11A-TA M12A-TA M13A-TA N10A-TA N11A-TA N12A-TA N13A-TA
O10A-TA O11A-TA O12A-TA
DUG-US HLID-US