Seismic Network Operations
IU TRQA
Tornquist, Argentina
IU TRQA commences operations on: 2000,302
| Host: | University of La Plata |
|---|---|
| Latitude: | -38.057 |
| Longitude: | -61.979 |
| Elevation: | 540 |
| Datalogger: | Q330 |
| Broadband: | KS-54000 |
| Accelerometer: | FBA_ES-T_EpiSensor_Accelerometer |
| Telemetry Status at the NEIC: |
 Last Data In Less Than 10 Minutes |
Vault Condition: Borehole
Site Geology: The borehole cuttings consisted of primarily gray siltstone with minor amounts of gray shale and gray sandstone.
| Location Code | Channel Code | Instrument | Flags | Sample Rate | Dip | Azimuth | Depth |
|---|---|---|---|---|---|---|---|
| 20 | LNZ | FBA ES-T EpiSensor Accelerometer | CG | 1.00 | -90.00 | 0.00 | 30.00 |
| 20 | LN2 | FBA ES-T EpiSensor Accelerometer | CG | 1.00 | 0.00 | 90.00 | 30.00 |
| 20 | LN1 | FBA ES-T EpiSensor Accelerometer | CG | 1.00 | 0.00 | 0.00 | 30.00 |
| 10 | VHZ | CMG3-TB | CG | 0.10 | -90.00 | 0.00 | 30.00 |
| 10 | VH2 | CMG3-TB | CG | 0.10 | 0.00 | 180.00 | 30.00 |
| 10 | VH1 | CMG3-TB | CG | 0.10 | 0.00 | 90.00 | 30.00 |
| 10 | LHZ | CMG3-TB | CG | 1.00 | -90.00 | 0.00 | 30.00 |
| 10 | LH2 | CMG3-TB | CG | 1.00 | 0.00 | 180.00 | 30.00 |
| 10 | LH1 | CMG3-TB | CG | 1.00 | 0.00 | 90.00 | 30.00 |
| 00 | VH2 | KS-54000 | CG | 0.10 | 0.00 | 211.00 | 101.00 |
| 10 | BHZ | CMG3-TB | CG | 40.00 | -90.00 | 0.00 | 30.00 |
| 10 | BH2 | CMG3-TB | CG | 40.00 | 0.00 | 180.00 | 30.00 |
| 10 | BH1 | CMG3-TB | CG | 40.00 | 0.00 | 90.00 | 30.00 |
| 00 | VHZ | KS-54000 | CG | 0.10 | -90.00 | 0.00 | 101.00 |
| 00 | VH1 | KS-54000 | CG | 0.10 | 0.00 | 121.00 | 101.00 |
| 00 | LHZ | KS-54000 | CG | 1.00 | -90.00 | 0.00 | 101.00 |
| 00 | LH2 | KS-54000 | CG | 1.00 | 0.00 | 211.00 | 101.00 |
| 00 | LH1 | KS-54000 | CG | 1.00 | 0.00 | 121.00 | 101.00 |
| 00 | BHZ | KS-54000 | CG | 20.00 | -90.00 | 0.00 | 101.00 |
| 00 | BH2 | KS-54000 | CG | 20.00 | 0.00 | 211.00 | 101.00 |
| 00 | BH1 | KS-54000 | CG | 20.00 | 0.00 | 121.00 | 101.00 |
| 30 | LDO | IU Paroscientific Microbarograph | CW | 1.00 | 0.00 | 0.00 | 0.00 |
| 20 | HNZ | FBA ES-T EpiSensor Accelerometer | TG | 100.00 | -90.00 | 0.00 | 30.00 |
| 20 | HN2 | FBA ES-T EpiSensor Accelerometer | TG | 100.00 | 0.00 | 90.00 | 30.00 |
| 20 | HN1 | FBA ES-T EpiSensor Accelerometer | TG | 100.00 | 0.00 | 0.00 | 30.00 |
| 10 | HHZ | CMG3-TB | TG | 100.00 | 0.00 | 0.00 | 30.00 |
| 10 | HH2 | CMG3-TB | TG | 100.00 | 0.00 | 180.00 | 30.00 |
| 10 | HH1 | CMG3-TB | TG | 100.00 | 0.00 | 90.00 | 30.00 |
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As part of the annual calibration process, the USGS runs a sequence that includes a random, a step, and several sine wave calibrations. Â The USGS analyzes the random binary calibration signal in order to estimate the instrument response. Â 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 | BH1 | 2012:010 | 2012:010 to No Ending Ti | A | 0.090629 | 0.022686 | 0.5269 | 0.43029 | CMG3-T-B | Random |
| 10 | BH2 | 2012:010 | 2012:010 to No Ending Ti | A | 0.088039 | 0.022552 | 0.54435 | 0.43383 | CMG3-T-B | Random |
| 10 | BHZ | 2012:010 | 2012:010 to No Ending Ti | A | 0.0085154 | 0.0096714 | 0.062999 | 0.084554 | CMG3-T-B | Random |
| 00 | BH1 | 2012:009 | 2011:038 to No Ending Ti | A | 0.046649 | 0.027007 | 0.94247 | 0.87982 | 54000 | Random |
| 00 | BH2 | 2012:009 | 2011:038 to No Ending Ti | A | 0.041229 | 0.02699 | 0.9633 | 0.9103 | 54000 | Random |
| 00 | BHZ | 2012:009 | 2011:038 to No Ending Ti | A | 0.051748 | 0.026068 | 0.90113 | 0.83026 | 54000 | Random |
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Current Issues.The microbarograph appears to have failed on 10 Oct 2009. The LN1 Episensor channel is noisy. The KS-54000 appears to have died on 2-8-2013. There is work being done on the regional power lines causing intermittent outages.
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2009-05-22Upgraded to Q330 digitizer.
