Seismic Network Operations


Kipapa, Hawaii, USA

IU KIP commences operations on: 1988,228

Country Flag
Host: Pacific Tsunami Warning Center
Latitude: 21.42
Longitude: -158.011
Elevation: 110
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
Station Photo Station Photo Station Photo 

Vault Condition: Vault is located at the end of a tunnel used during World War II to store ammuniation. 80 meter tunnel is cut into the side of a canyon on basalt of the Koolau Volcanic Series. The piers are made of concrete, isolated from the concrete floor, and extending approximately 3 feet below floor level and 1.5 feet above. They rest on weathered basalt. Temperature is stable. Dehumidifiers are used to control the humidity. Temperature +20 to +25 degrees Celsius.

Site Geology: The Kipapa tunnel is cut in the side of a canyon of basalt of the Koolau Series (Tertiary). Pier rests on weathered basalt.

Location CodeChannel CodeInstrumentFlagsSample RateDipAzimuthDepth
00BH1Streckeisen STS-1VBB w/E300CG20.000.00357.0033.00
00BH2Streckeisen STS-1VBB w/E300CG20.000.0087.0033.00
00BHZStreckeisen STS-1VBB w/E300CG20.00-90.000.0033.00
00LH1Streckeisen STS-1VBB w/E300CG1.000.00357.0033.00
00LH2Streckeisen STS-1VBB w/E300CG1.000.0087.0033.00
00LHZStreckeisen STS-1VBB w/E300CG1.00-90.000.0033.00
00VH1Streckeisen STS-1VBB w/E300CG0.100.00357.0033.00
00VH2Streckeisen STS-1VBB w/E300CG0.100.0087.0033.00
00VHZStreckeisen STS-1VBB w/E300CG0.10-90.000.0033.00
00VM1Streckeisen STS-1VBB w/E300CH0.100.000.0033.00
00VM2Streckeisen STS-1VBB w/E300CH0.100.000.0033.00
00VMZStreckeisen STS-1VBB w/E300CH0.100.000.0033.00
10BH1Streckeisen STS-2.5CG40.000.000.0033.00
10BH2Streckeisen STS-2.5CG40.000.0090.0033.00
10BHZStreckeisen STS-2.5CG40.00-90.000.0033.00
10HH1Streckeisen STS-2.5TG100.000.000.0033.00
10HH2Streckeisen STS-2.5TG100.000.0090.0033.00
10HHZStreckeisen STS-2.5TG100.00-90.000.0033.00
10LH1Streckeisen STS-2.5CG1.000.000.0033.00
10LH2Streckeisen STS-2.5CG1.000.0090.0033.00
10LHZStreckeisen STS-2.5CG1.00-90.000.0033.00
10VH1Streckeisen STS-2.5CG0.100.000.0033.00
10VH2Streckeisen STS-2.5CG0.100.0090.0033.00
10VHZStreckeisen STS-2.5CG0.10-90.000.0033.00
10VMUStreckeisen STS-2.5CH0.100.000.0033.00
10VMVStreckeisen STS-2.5CH0.100.000.0033.00
10VMWStreckeisen STS-2.5CH0.100.000.0033.00
20HN1Kinemetrics FBA ES-T EpiSensor AccelerometerTG100.000.000.0033.00
20HN2Kinemetrics FBA ES-T EpiSensor AccelerometerTG100.000.0090.0033.00
20HNZKinemetrics FBA ES-T EpiSensor AccelerometerTG100.00-90.000.0033.00
20LN1Kinemetrics FBA ES-T EpiSensor AccelerometerCG1.000.000.0033.00
20LN2Kinemetrics FBA ES-T EpiSensor AccelerometerCG1.000.0090.0033.00
20LNZKinemetrics FBA ES-T EpiSensor AccelerometerCG1.00-90.000.0033.00
30LDOlower quality chip sensor in Setra boxCW1.
31LDOCI/PAS pressure sensorCW1.
60BH1Metrozet M2166 VBB seismometerCG40.000.000.0033.00
60BH2Metrozet M2166 VBB seismometerCG40.000.0090.0033.00
60BHZMetrozet M2166 VBB seismometerCG40.00-90.000.0033.00
60LH1Metrozet M2166 VBB seismometerCG1.000.000.0033.00
60LH2Metrozet M2166 VBB seismometerCG1.000.0090.0033.00
60LHZMetrozet M2166 VBB seismometerCG1.00-90.000.0033.00
60VH1Metrozet M2166 VBB seismometerCG0.100.000.0033.00
60VH2Metrozet M2166 VBB seismometerCG0.100.0090.0033.00
60VHZMetrozet M2166 VBB seismometerCG0.10-90.000.0033.00
60VM1Metrozet M2166 VBB seismometerCH0.100.000.0033.00
60VM2Metrozet M2166 VBB seismometerCH0.100.000.0033.00
60VMZMetrozet M2166 VBB seismometerCH0.100.000.0033.00
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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.  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.

LocChanCal DateEpoch-SpanGradeAmp Nominal Error (dB)Amp Best Fit Error (dB)Phase Nominal Error (degree)Phase Best Fit Error (degree)SensorCal Type
00BH12013:3362011:315 to No Ending TimeA0.0180090.00873170.149420.12696STS1VBBE3Random
00BHZ2013:3362011:315 to No Ending TimeA0.020860.00990410.164650.19158STS1VBBE3Random
00BH22013:3362012:062 to No Ending TimeA0.0190830.0086630.155330.12792STS1VBBE3Random
  1. 2012-03-23
    STS-2 replaced with STS-2.5. Vacuum leak fixed on STS-1.
  2. 2012-03-02
    The Episensor which had excessively noisy channels was replaced.
  3. 2011-11-11
    Replaced cables to fix lowered long period response problem that had persisted since upgrade.
  4. 2010-08-26
    Upgraded to Q330 digitizer.