Seismic Network Operations
IU GNI
Garni, Armenia
IU GNI commences operations on: 1991,191
| Host: | National Survey for Seismic Protection |
|---|---|
| Latitude: | 40.148 |
| Longitude: | 44.741 |
| Elevation: | 1609 |
| Datalogger: | Q330 |
| Broadband: | STS-1VBB_w/E300 |
| Accelerometer: | FBA_ES-T_EpiSensor_Accelerometer |
| Telemetry Status at the NEIC: |
 Last Data In Less Than 10 Minutes |
Vault Condition: Vault is located 250 meters inside a mountain with approximately 60 meters of overburden. Seismometers are in a small room along side the tunnel and are mounted on piers. The piers are not isolated from the floor, but the floor is attached to bedrock. Entrance to the tunnel is through a building built into the hillside.
Site Geology: Alternating beds of basalt and tuff.
Location Code | Channel Code | Instrument | Flags | Sample Rate | Dip | Azimuth | Depth |
|---|---|---|---|---|---|---|---|
| 00 | VMZ | STS-1VBB w/E300 | CH | 0.10 | 0.00 | 0.00 | 100.00 |
| 00 | VM2 | STS-1VBB w/E300 | CH | 0.10 | 0.00 | 0.00 | 100.00 |
| 00 | VM1 | STS-1VBB w/E300 | CH | 0.10 | 0.00 | 0.00 | 100.00 |
| 00 | VHZ | STS-1VBB w/E300 | CG | 0.10 | -90.00 | 0.00 | 100.00 |
| 00 | VH2 | STS-1VBB w/E300 | CG | 0.10 | 0.00 | 90.00 | 100.00 |
| 00 | VH1 | STS-1VBB w/E300 | CG | 0.10 | 0.00 | 0.00 | 100.00 |
| 00 | LHZ | STS-1VBB w/E300 | CG | 1.00 | -90.00 | 0.00 | 100.00 |
| 00 | LH2 | STS-1VBB w/E300 | CG | 1.00 | 0.00 | 90.00 | 100.00 |
| 00 | LH1 | STS-1VBB w/E300 | CG | 1.00 | 0.00 | 0.00 | 100.00 |
| 00 | BHZ | STS-1VBB w/E300 | CG | 20.00 | -90.00 | 0.00 | 100.00 |
| 00 | BH2 | STS-1VBB w/E300 | CG | 20.00 | 0.00 | 90.00 | 100.00 |
| 00 | BH1 | STS-1VBB w/E300 | CG | 20.00 | 0.00 | 0.00 | 100.00 |
| 10 | VHZ | Trillium 240 broad band | CG | 0.10 | -90.00 | 0.00 | 100.00 |
| 10 | VH2 | Trillium 240 broad band | CG | 0.10 | 0.00 | 90.00 | 100.00 |
| 10 | VH1 | Trillium 240 broad band | CG | 0.10 | 0.00 | 0.00 | 100.00 |
| 10 | LHZ | Trillium 240 broad band | CG | 1.00 | -90.00 | 0.00 | 100.00 |
| 10 | LH2 | Trillium 240 broad band | CG | 1.00 | 0.00 | 90.00 | 100.00 |
| 10 | LH1 | Trillium 240 broad band | CG | 1.00 | 0.00 | 0.00 | 100.00 |
| 10 | HHZ | Trillium 240 broad band | TG | 100.00 | -90.00 | 0.00 | 100.00 |
| 10 | HH2 | Trillium 240 broad band | TG | 100.00 | 0.00 | 90.00 | 100.00 |
| 10 | HH1 | Trillium 240 broad band | TG | 100.00 | 0.00 | 0.00 | 100.00 |
| 10 | BHZ | Trillium 240 broad band | CG | 40.00 | -90.00 | 0.00 | 100.00 |
| 10 | BH2 | Trillium 240 broad band | CG | 40.00 | 0.00 | 90.00 | 100.00 |
| 10 | BH1 | Trillium 240 broad band | CG | 40.00 | 0.00 | 0.00 | 100.00 |
| 20 | LNZ | FBA ES-T EpiSensor Accelerometer | CG | 1.00 | -90.00 | 0.00 | 100.00 |
| 20 | LN2 | FBA ES-T EpiSensor Accelerometer | CG | 1.00 | 0.00 | 90.00 | 100.00 |
| 20 | LN1 | FBA ES-T EpiSensor Accelerometer | CG | 1.00 | 0.00 | 0.00 | 100.00 |
| 20 | HNZ | FBA ES-T EpiSensor Accelerometer | TG | 100.00 | -90.00 | 0.00 | 100.00 |
| 20 | HN2 | FBA ES-T EpiSensor Accelerometer | TG | 100.00 | 0.00 | 90.00 | 100.00 |
| 20 | HN1 | FBA ES-T EpiSensor Accelerometer | TG | 100.00 | 0.00 | 0.00 | 100.00 |
| 30 | LDO | CI/PAS pressure sensor | CW | 1.00 | 0.00 | 0.00 | 0.00 |
| 30 | BDO | CI/PAS pressure sensor | CW | 40.00 | 0.00 | 0.00 | 0.00 |
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Availability, Since 1972
Availability, 2 Month
As part of the annual calibration process, the USGS runs a sequence that includes a random, a step, and several sine wave calibrations. The USGS analyzes the random binary calibration signal in order to estimate the instrument response. The figures below show the results from the analysis of the most recent processed calibration at the station.
We use an iterative three-step method to estimate instrument response parameters (poles, zeros, sensitivity and gain) and their associated errors using random calibration signals. First, we solve a coarse non-linear inverse problem using a least squares grid search to yield a first approximation to the solution. This approach reduces the likelihood of poorly estimated parameters (a local-minimum solution) caused by noise in the calibration records and enhances algorithm convergence. Second, we iteratively solve a non-linear parameter estimation problem to obtain the least squares best-fit Laplace pole/zero/gain model. Third, by applying the central limit theorem we estimate the errors in this pole/zero model by solving the inverse problem at each frequency in a 2/3rds-octave band centered at each best-fit pole/zero frequency. This procedure yields error estimates of the 99% confidence interval.
| Loc | Chan | Cal Date | Epoch-Span | Grade | Amp Nominal Error (dB) | Amp Best Fit Error (dB) | Phase Nominal Error (degree) | Phase Best Fit Error (degree) | Sensor | Cal Type |
|---|---|---|---|---|---|---|---|---|---|---|
| 10 | BHZ | 2012:053 | 2010:280 to No Ending T | A | 0.010396 | 0.0076573 | 0.13807 | 0.089128 | TR240 | Random |
| 00 | BHZ | 2012:053 | 2010:280 to No Ending T | A | 0.015482 | 0.010146 | 0.17921 | 0.11487 | STS1VBBE3 | Random |
| 00 | BH2 | 2012:053 | 2010:280 to No Ending T | A | 0.021452 | 0.010359 | 0.14502 | 0.12011 | STS1VBBE3 | Random |
| 00 | BH1 | 2012:053 | 2010:280 to No Ending T | A | 0.029284 | 0.0097255 | 0.17564 | 0.13365 | STS1VBBE3 | Random |
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15-Oct-2010Upgraded to Q330 digitizer.
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Current IssuesSTS-1 components show LP pulsing.
