Ambient noise station-correlation spectra for USArray stations

L12A-TA secondary stations.

H11A-TA H12A-TA H13A-TA I09A-TA I10A-TA I11A-TA J09A-TA J10A-TA J11A-TA J12A-TA
J13A-TA K08A-TA K09A-TA K10A-TA K12A-TA K13A-TA K14A-TA L08A-TA L09A-TA L13A-TA
M08A-TA M09A-TA M10A-TA M11A-TA M12A-TA M13A-TA N09A-TA N10A-TA N11A-TA N12A-TA
N13A-TA O09A-TA O10A-TA O11A-TA O12A-TA P11A-TA P12A-TA
DUG-US HLID-US