Channel Sampling Rate HHZ 80 sps event triggered HHN 80 sps event triggered HHE 80 sps event triggered BHZ 20 sps continuous BHN 20 sps continuous BHE 20 sps continuous LHZ 1 sps continuous LHN 1 sps continuous LHE 1 sps continuous VHZ 0.1 sps continuous VHN 0.1 sps continuous VHE 0.1 sps continuous