For users who retrieved seismogram data in SEED volumes from the IRIS DMC (Data Management Center)
in the past, some of those SEED volumes might not have correct instrument responses (mainly gain).
In this case, you can still use the SEED volume and data by reading the SEED volume using
the external, "alternative response" file by setting environment variable as:
before you retrieve the waveform data using "rdseed" (Read SEED) program.
Figure 2:Amplitude responses of seismographs on 08/22/1998.
Several types of seismometers were used to record the seismic signals since the
summer of 1994. For example, during a 100-ton chemical calibration explosion
in 22 August 1998, sensors and dataloggers used are listed in Table 4.
The short-period seismometer
(L4C, T0 = 1 sec) was used at KKL for the 100-ton explosion.
The 21-element Kurchatov cross-array has borehole
short-period, vertical-component seismometers
(K-213, T0 = 2 sec) manufactured during the Soviet era.
The K-213 seismometers were installed in the early 1970's in the
boreholes at various depths with average emplacement depth of about
25 m. The array was refurbished in the late 1980's and again
in January 1995.
The K-213 seismometer has flat amplitude response between 0.5 and 5 Hz
to input ground velocity, however, each element was not individually
|Station code||Station name||Sensor model||Sample rate||A/D (bits)|