Seismograph name codes

EMT:	Short-period electromagnetic seismograph with three components
EMT76:	Short-period electromagnetic seismograph with two components
OBS:	Ocean-bottom seismograph
E93:	Short-period seismograph with digital ground velocity output
D93:	Acceleration seismograph with digital ground displacement output based on double record integration
E97:	Short-period seismograph with digital ground velocity output (appropriate frequency: 3 Hz)
I95:	Seismic intensity meter with digital ground displacement output based on numerical integration (filter application to simulate mechanical strong-motion seismograms)
WV:	Broad-band seismograph (STS-2)
MK:	Broad-band seismograph (VSE-311MK)
VD:	Electromagnetic seismograph with visible recorder model 61^*
V:	Short-period vertical seismograph^*
MS:	Short-period seismograph similar to the Benioff type^*
S:	Strong-motion seismograph^*
ES:	Electromagnetic strong-motion seismograph^*
I:	IRIS-2 system^*(Incorporated Research Institutions for Seismology). LP, SP and HI indicate response curves for IRIS system analog output obtained from digital filtering.
MSAS:	Matsushiro Seismic Array System^*. AM and AP indicate velocity output and low pass-filtered output of an array-system long-period seismograph, respectively. VBB indicates velocity output of a broad-band seismograph (STS-II) with 1 Hz LPF.

*: Installed at Matsushiro only.

SV:	Short-period seismograph with velocity output
SV-V:	Short-period seismograph with horizontal-tunnel installation and velocity output
SV-B:	Short-period seismograph with bore-hole installation and velocity output
LV-V:	Long-period seismograph with horizontal-tunnel installation and velocity output
BV:	Broad-band seismograph with velocity output
BV-V:	Broad-band seismograph with horizontal-tunnel installation and velocity output
KV-V:	Strong motion seismograph with horizontal-tunnel installation and velocity output
OBS:	Ocean-bottom seismograph
A-OBS:	Ocean-bottom acceleration seismograph