{ "schemaVersion": 1, "updatedAt": "2026-10-09", "status": "NOT_READY_FOR_HOMOGENEOUS_OBSERVED_SYNTHETIC_COMPARISON", "quantitativeComparisonPerformed": false, "fitPerformed": false, "formalPassThreshold": null, "newWaveformsProduced": false, "holdoutStationsAccessed": false, "holdoutStationsExcluded": [ "GALF", "SSY" ], "scope": "Local raw miniSEED, event and StationXML inspection; only EMCN/EVRN. Evaluate metadata transfer functions and filter designs, without applying a new correction/filter to observations or synthetics.", "conclusion": "Raw six-component acceleration records and flat low-frequency instrument responses are available, including newly retrieved -300..+600s observed context. The existing0.2–20Hz product remains incompatible with the0.05–0.2Hz target. The24s synthetic record has no processing guards and only1.2 cycles at0.05Hz. A separate response-corrected, common-processing dataset and longer synthetic support are required before quantitative comparison.", "event": { "originTimeUTC": "2018-12-26T02:19:14.000000Z", "observedProductOriginTimeUTC": "2018-12-26T02:19:14.000000Z", "syntheticSourceOriginTimeUTC": "2018-12-26T02:19:14.000000Z", "timeOriginsMatchExactly": true, "note": "Preferred hypocentre and TDMT centroid have different locations/depths; matching origin timestamps does not make those source geometries interchangeable." }, "target": { "bandHz": [ 0.05, 0.2 ], "syntheticWindowSeconds": [ -8.0, 15.999703999999998 ], "syntheticSpanSeconds": 23.999703999999998, "periodRangeSeconds": [ 5, 20 ], "cyclesInSyntheticRecordAtBandEdges": [ 1.1999852, 4.7999408 ], "nominalFourierBinHz": 0.0416671805618936, "preOriginSeconds": 8, "postOriginSeconds": 15.999703999999998, "guardsOutsideComparisonWindowSeconds": [ 0, 0 ], "interpretation": "A24s excerpt may show local motion but cannot by itself provide stable low-frequency duration, spectral or full-event amplitude validation. Filtering that excerpt introduces uncontrolled boundary assumptions." }, "rawAvailability": { "stationCount": 2, "traceCount": 6, "gapsOrOverlaps": [], "commonSupportSeconds": [ -44.775, 136.05 ], "commonSpanSeconds": 180.82500000000002, "minimumLeftMarginSeconds": 36.775, "minimumRightMarginSeconds": 120.05029600000002, "longestCommonPreOriginBaselineSeconds": 44.775, "preOriginCyclesAtPoint05Hz": 2.23875, "noiseConclusion": "About45s pre-event baseline gives only2.2 cycles at0.05Hz; no robust low-frequency SNR certification inferred. Existing -30..-5s noise metric was calculated in another band." }, "traces": [ { "id": "IV.EMCN..HNE", "samples": 36320, "samplingRateHz": 200.0, "rawDtype": "int32", "finite": true, "rawStartUTC": "2018-12-26T02:18:28.455000Z", "rawEndUTC": "2018-12-26T02:21:30.050000Z", "relativeStartSeconds": -45.545, "relativeEndSeconds": 136.05, "rawSpanSeconds": 181.59500000000003, "leftMarginToSyntheticWindowSeconds": 37.545, "rightMarginToSyntheticWindowSeconds": 120.05029600000002, "leftMarginIn20SecondCycles": 1.87725, "rightMarginIn20SecondCycles": 6.002514800000001, "responseEpochStartUTC": "2013-06-02T10:30:00.000000Z", "responseEpochEndUTC": "2023-07-05T16:00:00.000000Z", "responseEpochCoversRaw": true, "responseStages": 4, "responseInputUnits": "m/s**2", "responseOutputUnits": "count", "declaredSensitivity": 1631520.0, "declaredSensitivityFrequencyHz": 0.2, "instrument": "KINEMETRICS EPISENSOR", "azimuthDegrees": 90.0, "dipDegrees": 0.0, "sensorDepthMetres": 0.0, "lowFrequencyResponse": [ { "frequencyHz": 0.01, "countsPerMps2": 1631809.08537522, "phaseDegrees": -0.005473835214439556, "magnitudeRelativeToPoint2Hz": 1.0000000718549753 }, { "frequencyHz": 0.02, "countsPerMps2": 1631809.084493618, "phaseDegrees": -0.010947670443304403, "magnitudeRelativeToPoint2Hz": 1.0000000713147148 }, { "frequencyHz": 0.04, "countsPerMps2": 1631809.0809672095, "phaseDegrees": -0.02189534100204753, "magnitudeRelativeToPoint2Hz": 1.0000000691536723 }, { "frequencyHz": 0.05, "countsPerMps2": 1631809.0783224027, "phaseDegrees": -0.02736917636079004, "magnitudeRelativeToPoint2Hz": 1.0000000675328902 }, { "frequencyHz": 0.075, "countsPerMps2": 1631809.0691390405, "phaseDegrees": -0.04105376510482932, "magnitudeRelativeToPoint2Hz": 1.0000000619051712 }, { "frequencyHz": 0.1, "countsPerMps2": 1631809.0562823229, "phaseDegrees": -0.05473835452525075, "magnitudeRelativeToPoint2Hz": 1.0000000540263583 }, { "frequencyHz": 0.15, "countsPerMps2": 1631809.0195487726, "phaseDegrees": -0.08210753629707913, "magnitudeRelativeToPoint2Hz": 1.0000000315154205 }, { "frequencyHz": 0.2, "countsPerMps2": 1631808.9681216269, "phaseDegrees": -0.1094767234799247, "magnitudeRelativeToPoint2Hz": 1.0 }, { "frequencyHz": 0.5, "countsPerMps2": 1631808.3509798744, "phaseDegrees": -0.2736920612139202, "magnitudeRelativeToPoint2Hz": 0.9999996218051472 }, { "frequencyHz": 1.0, "countsPerMps2": 1631806.1466610597, "phaseDegrees": -0.547385926080734, "magnitudeRelativeToPoint2Hz": 0.9999982709614775 } ], "sensorPoleZeroStage": { "zeros": [], "poles": [ [ -981.0, -1009.0 ], [ -981.0, 1009.0 ], [ -3290.0, -1263.0 ], [ -3290.0, 1263.0 ] ] }, "decimationStages": [ { "stage": 2, "inputSampleRateHz": 30000.0, "factor": 1, "delaySeconds": 0.0, "correctionSeconds": 0.0 }, { "stage": 3, "inputSampleRateHz": 30000.0, "factor": 15, "delaySeconds": 0.0, "correctionSeconds": -0.0027333 }, { "stage": 4, "inputSampleRateHz": 2000.0, "factor": 10, "delaySeconds": 0.0, "correctionSeconds": -0.0465 } ], "qualityLimit": "No independent low-frequency noise, clipping, tilt or baseline certification; metadata transfer response does not certify actual usable low-frequency signal." }, { "id": "IV.EMCN..HNN", "samples": 36361, "samplingRateHz": 200.0, "rawDtype": "int32", "finite": true, "rawStartUTC": "2018-12-26T02:18:29.225000Z", "rawEndUTC": "2018-12-26T02:21:31.025000Z", "relativeStartSeconds": -44.775, "relativeEndSeconds": 137.025, "rawSpanSeconds": 181.8, "leftMarginToSyntheticWindowSeconds": 36.775, "rightMarginToSyntheticWindowSeconds": 121.02529600000001, "leftMarginIn20SecondCycles": 1.8387499999999999, "rightMarginIn20SecondCycles": 6.0512648, "responseEpochStartUTC": "2013-06-02T10:30:00.000000Z", "responseEpochEndUTC": "2023-07-05T16:00:00.000000Z", "responseEpochCoversRaw": true, "responseStages": 4, "responseInputUnits": "m/s**2", "responseOutputUnits": "count", "declaredSensitivity": 1631520.0, "declaredSensitivityFrequencyHz": 0.2, "instrument": "KINEMETRICS EPISENSOR", "azimuthDegrees": 0.0, "dipDegrees": 0.0, "sensorDepthMetres": 0.0, "lowFrequencyResponse": [ { "frequencyHz": 0.01, "countsPerMps2": 1631809.08537522, "phaseDegrees": -0.005473835214439556, "magnitudeRelativeToPoint2Hz": 1.0000000718549753 }, { "frequencyHz": 0.02, "countsPerMps2": 1631809.084493618, "phaseDegrees": -0.010947670443304403, "magnitudeRelativeToPoint2Hz": 1.0000000713147148 }, { "frequencyHz": 0.04, "countsPerMps2": 1631809.0809672095, "phaseDegrees": -0.02189534100204753, "magnitudeRelativeToPoint2Hz": 1.0000000691536723 }, { "frequencyHz": 0.05, "countsPerMps2": 1631809.0783224027, "phaseDegrees": -0.02736917636079004, "magnitudeRelativeToPoint2Hz": 1.0000000675328902 }, { "frequencyHz": 0.075, "countsPerMps2": 1631809.0691390405, "phaseDegrees": -0.04105376510482932, "magnitudeRelativeToPoint2Hz": 1.0000000619051712 }, { "frequencyHz": 0.1, "countsPerMps2": 1631809.0562823229, "phaseDegrees": -0.05473835452525075, "magnitudeRelativeToPoint2Hz": 1.0000000540263583 }, { "frequencyHz": 0.15, "countsPerMps2": 1631809.0195487726, "phaseDegrees": -0.08210753629707913, "magnitudeRelativeToPoint2Hz": 1.0000000315154205 }, { "frequencyHz": 0.2, "countsPerMps2": 1631808.9681216269, "phaseDegrees": -0.1094767234799247, "magnitudeRelativeToPoint2Hz": 1.0 }, { "frequencyHz": 0.5, "countsPerMps2": 1631808.3509798744, "phaseDegrees": -0.2736920612139202, "magnitudeRelativeToPoint2Hz": 0.9999996218051472 }, { "frequencyHz": 1.0, "countsPerMps2": 1631806.1466610597, "phaseDegrees": -0.547385926080734, "magnitudeRelativeToPoint2Hz": 0.9999982709614775 } ], "sensorPoleZeroStage": { "zeros": [], "poles": [ [ -981.0, -1009.0 ], [ -981.0, 1009.0 ], [ -3290.0, -1263.0 ], [ -3290.0, 1263.0 ] ] }, "decimationStages": [ { "stage": 2, "inputSampleRateHz": 30000.0, "factor": 1, "delaySeconds": 0.0, "correctionSeconds": 0.0 }, { "stage": 3, "inputSampleRateHz": 30000.0, "factor": 15, "delaySeconds": 0.0, "correctionSeconds": -0.0027333 }, { "stage": 4, "inputSampleRateHz": 2000.0, "factor": 10, "delaySeconds": 0.0, "correctionSeconds": -0.0465 } ], "qualityLimit": "No independent low-frequency noise, clipping, tilt or baseline certification; metadata transfer response does not certify actual usable low-frequency signal." }, { "id": "IV.EMCN..HNZ", "samples": 36644, "samplingRateHz": 200.0, "rawDtype": "int32", "finite": true, "rawStartUTC": "2018-12-26T02:18:28.295000Z", "rawEndUTC": "2018-12-26T02:21:31.510000Z", "relativeStartSeconds": -45.705, "relativeEndSeconds": 137.51, "rawSpanSeconds": 183.21499999999997, "leftMarginToSyntheticWindowSeconds": 37.705, "rightMarginToSyntheticWindowSeconds": 121.510296, "leftMarginIn20SecondCycles": 1.8852499999999999, "rightMarginIn20SecondCycles": 6.0755148, "responseEpochStartUTC": "2013-06-02T10:30:00.000000Z", "responseEpochEndUTC": "2023-07-05T16:00:00.000000Z", "responseEpochCoversRaw": true, "responseStages": 4, "responseInputUnits": "m/s**2", "responseOutputUnits": "count", "declaredSensitivity": 1631520.0, "declaredSensitivityFrequencyHz": 0.2, "instrument": "KINEMETRICS EPISENSOR", "azimuthDegrees": 0.0, "dipDegrees": -90.0, "sensorDepthMetres": 0.0, "lowFrequencyResponse": [ { "frequencyHz": 0.01, "countsPerMps2": 1631809.08537522, "phaseDegrees": -0.005473835214439556, "magnitudeRelativeToPoint2Hz": 1.0000000718549753 }, { "frequencyHz": 0.02, "countsPerMps2": 1631809.084493618, "phaseDegrees": -0.010947670443304403, "magnitudeRelativeToPoint2Hz": 1.0000000713147148 }, { "frequencyHz": 0.04, "countsPerMps2": 1631809.0809672095, "phaseDegrees": -0.02189534100204753, "magnitudeRelativeToPoint2Hz": 1.0000000691536723 }, { "frequencyHz": 0.05, "countsPerMps2": 1631809.0783224027, "phaseDegrees": -0.02736917636079004, "magnitudeRelativeToPoint2Hz": 1.0000000675328902 }, { "frequencyHz": 0.075, "countsPerMps2": 1631809.0691390405, "phaseDegrees": -0.04105376510482932, "magnitudeRelativeToPoint2Hz": 1.0000000619051712 }, { "frequencyHz": 0.1, "countsPerMps2": 1631809.0562823229, "phaseDegrees": -0.05473835452525075, "magnitudeRelativeToPoint2Hz": 1.0000000540263583 }, { "frequencyHz": 0.15, "countsPerMps2": 1631809.0195487726, "phaseDegrees": -0.08210753629707913, "magnitudeRelativeToPoint2Hz": 1.0000000315154205 }, { "frequencyHz": 0.2, "countsPerMps2": 1631808.9681216269, "phaseDegrees": -0.1094767234799247, "magnitudeRelativeToPoint2Hz": 1.0 }, { "frequencyHz": 0.5, "countsPerMps2": 1631808.3509798744, "phaseDegrees": -0.2736920612139202, "magnitudeRelativeToPoint2Hz": 0.9999996218051472 }, { "frequencyHz": 1.0, "countsPerMps2": 1631806.1466610597, "phaseDegrees": -0.547385926080734, "magnitudeRelativeToPoint2Hz": 0.9999982709614775 } ], "sensorPoleZeroStage": { "zeros": [], "poles": [ [ -981.0, -1009.0 ], [ -981.0, 1009.0 ], [ -3290.0, -1263.0 ], [ -3290.0, 1263.0 ] ] }, "decimationStages": [ { "stage": 2, "inputSampleRateHz": 30000.0, "factor": 1, "delaySeconds": 0.0, "correctionSeconds": 0.0 }, { "stage": 3, "inputSampleRateHz": 30000.0, "factor": 15, "delaySeconds": 0.0, "correctionSeconds": -0.0027333 }, { "stage": 4, "inputSampleRateHz": 2000.0, "factor": 10, "delaySeconds": 0.0, "correctionSeconds": -0.0465 } ], "qualityLimit": "No independent low-frequency noise, clipping, tilt or baseline certification; metadata transfer response does not certify actual usable low-frequency signal." }, { "id": "IV.EVRN..HNE", "samples": 36286, "samplingRateHz": 200.0, "rawDtype": "int32", "finite": true, "rawStartUTC": "2018-12-26T02:18:28.945000Z", "rawEndUTC": "2018-12-26T02:21:30.370000Z", "relativeStartSeconds": -45.055, "relativeEndSeconds": 136.37, "rawSpanSeconds": 181.425, "leftMarginToSyntheticWindowSeconds": 37.055, "rightMarginToSyntheticWindowSeconds": 120.37029600000001, "leftMarginIn20SecondCycles": 1.85275, "rightMarginIn20SecondCycles": 6.0185148, "responseEpochStartUTC": "2010-01-20T10:36:00.000000Z", "responseEpochEndUTC": null, "responseEpochCoversRaw": true, "responseStages": 4, "responseInputUnits": "m/s**2", "responseOutputUnits": "count", "declaredSensitivity": 1631520.0, "declaredSensitivityFrequencyHz": 0.2, "instrument": "KINEMETRICS EPISENSOR", "azimuthDegrees": 90.0, "dipDegrees": 0.0, "sensorDepthMetres": 0.0, "lowFrequencyResponse": [ { "frequencyHz": 0.01, "countsPerMps2": 1631809.08537522, "phaseDegrees": -0.005473835214439556, "magnitudeRelativeToPoint2Hz": 1.0000000718549753 }, { "frequencyHz": 0.02, "countsPerMps2": 1631809.084493618, "phaseDegrees": -0.010947670443304403, "magnitudeRelativeToPoint2Hz": 1.0000000713147148 }, { "frequencyHz": 0.04, "countsPerMps2": 1631809.0809672095, "phaseDegrees": -0.02189534100204753, "magnitudeRelativeToPoint2Hz": 1.0000000691536723 }, { "frequencyHz": 0.05, "countsPerMps2": 1631809.0783224027, "phaseDegrees": -0.02736917636079004, "magnitudeRelativeToPoint2Hz": 1.0000000675328902 }, { "frequencyHz": 0.075, "countsPerMps2": 1631809.0691390405, "phaseDegrees": -0.04105376510482932, "magnitudeRelativeToPoint2Hz": 1.0000000619051712 }, { "frequencyHz": 0.1, "countsPerMps2": 1631809.0562823229, "phaseDegrees": -0.05473835452525075, "magnitudeRelativeToPoint2Hz": 1.0000000540263583 }, { "frequencyHz": 0.15, "countsPerMps2": 1631809.0195487726, "phaseDegrees": -0.08210753629707913, "magnitudeRelativeToPoint2Hz": 1.0000000315154205 }, { "frequencyHz": 0.2, "countsPerMps2": 1631808.9681216269, "phaseDegrees": -0.1094767234799247, "magnitudeRelativeToPoint2Hz": 1.0 }, { "frequencyHz": 0.5, "countsPerMps2": 1631808.3509798744, "phaseDegrees": -0.2736920612139202, "magnitudeRelativeToPoint2Hz": 0.9999996218051472 }, { "frequencyHz": 1.0, "countsPerMps2": 1631806.1466610597, "phaseDegrees": -0.547385926080734, "magnitudeRelativeToPoint2Hz": 0.9999982709614775 } ], "sensorPoleZeroStage": { "zeros": [], "poles": [ [ -981.0, -1009.0 ], [ -981.0, 1009.0 ], [ -3290.0, -1263.0 ], [ -3290.0, 1263.0 ] ] }, "decimationStages": [ { "stage": 2, "inputSampleRateHz": 30000.0, "factor": 1, "delaySeconds": 0.0, "correctionSeconds": 0.0 }, { "stage": 3, "inputSampleRateHz": 30000.0, "factor": 15, "delaySeconds": 0.0, "correctionSeconds": -0.0027333 }, { "stage": 4, "inputSampleRateHz": 2000.0, "factor": 10, "delaySeconds": 0.0, "correctionSeconds": -0.0465 } ], "qualityLimit": "No independent low-frequency noise, clipping, tilt or baseline certification; metadata transfer response does not certify actual usable low-frequency signal." }, { "id": "IV.EVRN..HNN", "samples": 36333, "samplingRateHz": 200.0, "rawDtype": "int32", "finite": true, "rawStartUTC": "2018-12-26T02:18:28.725000Z", "rawEndUTC": "2018-12-26T02:21:30.385000Z", "relativeStartSeconds": -45.275, "relativeEndSeconds": 136.385, "rawSpanSeconds": 181.66, "leftMarginToSyntheticWindowSeconds": 37.275, "rightMarginToSyntheticWindowSeconds": 120.385296, "leftMarginIn20SecondCycles": 1.86375, "rightMarginIn20SecondCycles": 6.0192648, "responseEpochStartUTC": "2010-01-20T10:36:00.000000Z", "responseEpochEndUTC": null, "responseEpochCoversRaw": true, "responseStages": 4, "responseInputUnits": "m/s**2", "responseOutputUnits": "count", "declaredSensitivity": 1631520.0, "declaredSensitivityFrequencyHz": 0.2, "instrument": "KINEMETRICS EPISENSOR", "azimuthDegrees": 0.0, "dipDegrees": 0.0, "sensorDepthMetres": 0.0, "lowFrequencyResponse": [ { "frequencyHz": 0.01, "countsPerMps2": 1631809.08537522, "phaseDegrees": -0.005473835214439556, "magnitudeRelativeToPoint2Hz": 1.0000000718549753 }, { "frequencyHz": 0.02, "countsPerMps2": 1631809.084493618, "phaseDegrees": -0.010947670443304403, "magnitudeRelativeToPoint2Hz": 1.0000000713147148 }, { "frequencyHz": 0.04, "countsPerMps2": 1631809.0809672095, "phaseDegrees": -0.02189534100204753, "magnitudeRelativeToPoint2Hz": 1.0000000691536723 }, { "frequencyHz": 0.05, "countsPerMps2": 1631809.0783224027, "phaseDegrees": -0.02736917636079004, "magnitudeRelativeToPoint2Hz": 1.0000000675328902 }, { "frequencyHz": 0.075, "countsPerMps2": 1631809.0691390405, "phaseDegrees": -0.04105376510482932, "magnitudeRelativeToPoint2Hz": 1.0000000619051712 }, { "frequencyHz": 0.1, "countsPerMps2": 1631809.0562823229, "phaseDegrees": -0.05473835452525075, "magnitudeRelativeToPoint2Hz": 1.0000000540263583 }, { "frequencyHz": 0.15, "countsPerMps2": 1631809.0195487726, "phaseDegrees": -0.08210753629707913, "magnitudeRelativeToPoint2Hz": 1.0000000315154205 }, { "frequencyHz": 0.2, "countsPerMps2": 1631808.9681216269, "phaseDegrees": -0.1094767234799247, "magnitudeRelativeToPoint2Hz": 1.0 }, { "frequencyHz": 0.5, "countsPerMps2": 1631808.3509798744, "phaseDegrees": -0.2736920612139202, "magnitudeRelativeToPoint2Hz": 0.9999996218051472 }, { "frequencyHz": 1.0, "countsPerMps2": 1631806.1466610597, "phaseDegrees": -0.547385926080734, "magnitudeRelativeToPoint2Hz": 0.9999982709614775 } ], "sensorPoleZeroStage": { "zeros": [], "poles": [ [ -981.0, -1009.0 ], [ -981.0, 1009.0 ], [ -3290.0, -1263.0 ], [ -3290.0, 1263.0 ] ] }, "decimationStages": [ { "stage": 2, "inputSampleRateHz": 30000.0, "factor": 1, "delaySeconds": 0.0, "correctionSeconds": 0.0 }, { "stage": 3, "inputSampleRateHz": 30000.0, "factor": 15, "delaySeconds": 0.0, "correctionSeconds": -0.0027333 }, { "stage": 4, "inputSampleRateHz": 2000.0, "factor": 10, "delaySeconds": 0.0, "correctionSeconds": -0.0465 } ], "qualityLimit": "No independent low-frequency noise, clipping, tilt or baseline certification; metadata transfer response does not certify actual usable low-frequency signal." }, { "id": "IV.EVRN..HNZ", "samples": 36356, "samplingRateHz": 200.0, "rawDtype": "int32", "finite": true, "rawStartUTC": "2018-12-26T02:18:28.805000Z", "rawEndUTC": "2018-12-26T02:21:30.580000Z", "relativeStartSeconds": -45.195, "relativeEndSeconds": 136.58, "rawSpanSeconds": 181.775, "leftMarginToSyntheticWindowSeconds": 37.195, "rightMarginToSyntheticWindowSeconds": 120.58029600000002, "leftMarginIn20SecondCycles": 1.85975, "rightMarginIn20SecondCycles": 6.029014800000001, "responseEpochStartUTC": "2010-01-20T10:36:00.000000Z", "responseEpochEndUTC": null, "responseEpochCoversRaw": true, "responseStages": 4, "responseInputUnits": "m/s**2", "responseOutputUnits": "count", "declaredSensitivity": 1631520.0, "declaredSensitivityFrequencyHz": 0.2, "instrument": "KINEMETRICS EPISENSOR", "azimuthDegrees": 0.0, "dipDegrees": -90.0, "sensorDepthMetres": 0.0, "lowFrequencyResponse": [ { "frequencyHz": 0.01, "countsPerMps2": 1631809.08537522, "phaseDegrees": -0.005473835214439556, "magnitudeRelativeToPoint2Hz": 1.0000000718549753 }, { "frequencyHz": 0.02, "countsPerMps2": 1631809.084493618, "phaseDegrees": -0.010947670443304403, "magnitudeRelativeToPoint2Hz": 1.0000000713147148 }, { "frequencyHz": 0.04, "countsPerMps2": 1631809.0809672095, "phaseDegrees": -0.02189534100204753, "magnitudeRelativeToPoint2Hz": 1.0000000691536723 }, { "frequencyHz": 0.05, "countsPerMps2": 1631809.0783224027, "phaseDegrees": -0.02736917636079004, "magnitudeRelativeToPoint2Hz": 1.0000000675328902 }, { "frequencyHz": 0.075, "countsPerMps2": 1631809.0691390405, "phaseDegrees": -0.04105376510482932, "magnitudeRelativeToPoint2Hz": 1.0000000619051712 }, { "frequencyHz": 0.1, "countsPerMps2": 1631809.0562823229, "phaseDegrees": -0.05473835452525075, "magnitudeRelativeToPoint2Hz": 1.0000000540263583 }, { "frequencyHz": 0.15, "countsPerMps2": 1631809.0195487726, "phaseDegrees": -0.08210753629707913, "magnitudeRelativeToPoint2Hz": 1.0000000315154205 }, { "frequencyHz": 0.2, "countsPerMps2": 1631808.9681216269, "phaseDegrees": -0.1094767234799247, "magnitudeRelativeToPoint2Hz": 1.0 }, { "frequencyHz": 0.5, "countsPerMps2": 1631808.3509798744, "phaseDegrees": -0.2736920612139202, "magnitudeRelativeToPoint2Hz": 0.9999996218051472 }, { "frequencyHz": 1.0, "countsPerMps2": 1631806.1466610597, "phaseDegrees": -0.547385926080734, "magnitudeRelativeToPoint2Hz": 0.9999982709614775 } ], "sensorPoleZeroStage": { "zeros": [], "poles": [ [ -981.0, -1009.0 ], [ -981.0, 1009.0 ], [ -3290.0, -1263.0 ], [ -3290.0, 1263.0 ] ] }, "decimationStages": [ { "stage": 2, "inputSampleRateHz": 30000.0, "factor": 1, "delaySeconds": 0.0, "correctionSeconds": 0.0 }, { "stage": 3, "inputSampleRateHz": 30000.0, "factor": 15, "delaySeconds": 0.0, "correctionSeconds": -0.0027333 }, { "stage": 4, "inputSampleRateHz": 2000.0, "factor": 10, "delaySeconds": 0.0, "correctionSeconds": -0.0465 } ], "qualityLimit": "No independent low-frequency noise, clipping, tilt or baseline certification; 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no response correction, target-band processing or SNR certification has been performed." }, "orientation": { "observed": "HNE azimuth90 dip0=east; HNN azimuth0 dip0=north; HNZ dip-90=up.", "synthetic": "X/Y/Z are Cartesian UTM easting/northing/up with identity receiver rotation in existing run logs.", "nominalMapping": { "X": "HNE", "Y": "HNN", "Z": "HNZ" }, "required": "Apply the documented grid-to-geographic vector rotation, including UTM meridian convergence; preserve signs and metadata epochs. No correlation-maximising rotation or time shift." }, "existingProcessedProduct": { "path": "work/geophysics-site/data/fiandaca-observations.json", "processing": { "software": "ObsPy 1.5.1", "detrend": "linear, before deconvolution", "responseOutput": "ACC", "responsePreFilterHz": [ 0.05, 0.1, 30, 40 ], "waterLevel": null, "responseTaperFraction": 0.05, "bandpassHz": [ 0.2, 20 ], "butterworthCorners": 4, "zeroPhase": true, "metricWindowSeconds": [ 0, 120 ], "noiseWindowSeconds": [ -30, -5 ], "ariasNoiseSubtracted": false, "responseSpectrum": "Newmark average acceleration beta=0.25 gamma=0.5, unit-mass linear oscillator, 5% damping, zero displacement/velocity and initial equilibrium acceleration, on the metric window", "display": "min/max envelope per 10 original samples, 0.05 s; metrics computed on all 200 Hz samples" }, "steadyStateProcessingTransferDiagnostic": [ { "frequencyHz": 0.025, "bandpassSteadyStateAmplitude": 5.521247792850839e-08, "responsePrefilterAmplitude": 0.0, "combinedProcessingAmplitude": 0.0 }, { "frequencyHz": 0.04, "bandpassSteadyStateAmplitude": 2.3758303000678634e-06, "responsePrefilterAmplitude": 0.0, "combinedProcessingAmplitude": 0.0 }, { "frequencyHz": 0.05, "bandpassSteadyStateAmplitude": 1.4185572356607244e-05, "responsePrefilterAmplitude": 0.0, "combinedProcessingAmplitude": 0.0 }, { "frequencyHz": 0.075, "bandpassSteadyStateAmplitude": 0.00036563872797017817, "responsePrefilterAmplitude": 0.4999999999999997, "combinedProcessingAmplitude": 0.00018281936398508898 }, { "frequencyHz": 0.1, "bandpassSteadyStateAmplitude": 0.0036711829378026574, "responsePrefilterAmplitude": 1.0, "combinedProcessingAmplitude": 0.0036711829378026574 }, { "frequencyHz": 0.15, "bandpassSteadyStateAmplitude": 0.08821985387808749, "responsePrefilterAmplitude": 1.0, "combinedProcessingAmplitude": 0.08821985387808749 }, { "frequencyHz": 0.2, "bandpassSteadyStateAmplitude": 0.5000000000044894, "responsePrefilterAmplitude": 1.0, "combinedProcessingAmplitude": 0.5000000000044894 } ], "interpretation": "At0.05Hz the response prefilter is zero; at0.1Hz the combined nominal amplitude is about0.00367, and at0.2Hz about0.5. The published processed series cannot recover the missing target band by another filter.", "noQuantitativeComparisonAllowedAsIs": true }, "lowFrequencyResponseInterpretation": { "finding": "All six StationXML channels are KINEMETRICS EPISENSOR accelerometers with four response stages, no sensor-stage zeros at DC, and near-flat counts/(m/s²) response across0.05–0.2Hz.", "qualification": "Transfer-function compatibility is supported by metadata; actual low-frequency fidelity still needs baseline/noise/tilt and field-quality checks. Retain decimation delay/correction stages in full response removal." }, "edgeMarginDiagnostic": { "candidateFilter": "Butterworth four corners,0.05–0.2Hz at200Hz, forward/reverse as in current ObsPy implementation; candidate only, not applied.", "slowestPoleModulus": 0.9996216874460886, "slowestOneWayPoleEfoldSeconds": 13.21408477536566, "fiveEfoldSeconds": 66.0704238768283, "note": "About66s is a decay-scale illustration, not a validated guard or acceptance criterion; the observed left margin is only36.8s and synthetics have zero guards. Zero-phase filtering, response taper and baseline processing require explicit edge-sensitivity checks." }, "requirementsForNextComparison": [ { "id": "separate-processing", "requirement": "Start from raw counts and matching full StationXML. Preserve the current0.2–20Hz files. Produce separately versioned acceleration in m/s² with documented baseline treatment and deconvolution prefilter that is flat over0.05–0.2Hz.", "concreteCandidateNotTested": { "responsePreFilterHz": [ 0.02, 0.04, 0.3, 0.4 ], "responseOutput": "ACC", "waterLevel": null, "commonBandpassHz": [ 0.05, 0.2 ], "butterworthCorners": 4, "zeroPhase": true }, "caution": "Candidate values are not a selected successful fit; certify baseline and edge sensitivity before fixing processing." }, { "id": "time-support", "requirement": "Generate longer synthetic support before filtering and retain raw observed margins. Define and test common processing guard lengths; pad-only zeros or mirrored data are numerical assumptions, not observations.", "concreteLocalAction": "Use the newly available -300..+600s observed context for future baseline and edge checks. A conservative trial100s guard around -8..+16s requires common support -108..+116s, now available in observations; longer synthetic support remains missing.", "trialGuardSupportUTC": [ "2018-12-26T02:17:26.000000Z", "2018-12-26T02:21:10.000000Z" ], "caution": "100s is a planning trial, not a proven required duration. Do not alter the source half-duration to obtain more guard; audit source start/t0 and solver output timing separately." }, { "id": "common-operator", "requirement": "Apply the same final bandpass transfer, phase convention, taper/window and sampling to both acceleration datasets; response correction applies to observations only. Filter full guarded records first, then crop the registered comparison window; anti-alias before any resampling." }, { "id": "station-geometry", "requirement": "Use EVRN for the existing preflight only; EMCN is outside its mesh. The prepared90s production candidate contains both stations but is unexecuted and has receiver-height offsets that remain unresolved. Reconcile station elevations, terrain vertical datum and actual sensor depth." }, { "id": "time-and-components", "requirement": "Register both to2018-12-26T02:19:14Z, select TDMT centroid consistently, transform UTM/geographic components explicitly, and align sample grids without optimising lag, sign, rotation or amplitude." }, { "id": "independent-quality", "requirement": "Assess noise/baseline, gaps, clipping and edge sensitivity in the new low-frequency band before defining waveform metrics and tolerances. Fix metrics/window in advance, preserve all raw residuals, and keep GALF/SSY untouched for independent holdout." }, { "id": "numerical-readiness", "requirement": "Complete temporal and spatial/boundary checks on raw synthetic acceleration; narrow-band comparison alone does not solve the existing raw acceleration discrepancy or validate regional geology." } ], "preparedProductionCandidate": { "durationSeconds": 90.000196, "targetBandHz": [ 0.05, 0.2 ], "status": "EXPLORATORY_INPUTS_READY_NOT_RUN", "note": "Prepared90s duration is longer but supplies no demonstrated pre-source guard and is not completed synthetic output." }, "provenance": [ { "path": "work/etna-model-data/fiandaca2018-hn.mseed", "sha256": "ebdbf323282de8aef01141c21d58e0a8f642e89f36fddc18c059bde32839e4b8", "bytes": 374272 }, { "path": "work/etna-model-data/fiandaca2018-response.xml", "sha256": "983c888b94f4d83b3fa2a25785524d45834d2ef6733be6ae8bae60dd89cbcd97", "bytes": 174004 }, { "path": "work/etna-model-data/fiandaca2018-event.xml", "sha256": "53dec295d5441c38ef00a218838a744769516cd1748fed86e34d50d46a5a61fa", "bytes": 10561 }, { "path": "work/geophysics-site/data/fiandaca-observations.json", "sha256": "9496555b2dde55984640bf2c889ec101902fa12612bd71c4a6cf7e882a085cca", "bytes": 683780 }, { "path": "work/geophysics-site/data/fiandaca2018-corrected-acceleration.mseed", "sha256": "76d07e6a6bd9dfa6caf77612b396d5dddd9a3b007cc3a10c287d1b1e0cbc5093", "bytes": 1941504 }, { "path": "work/geophysics-site/data/etna-preflight.json", "sha256": "a77291d65c8be5abacc8528d817f4e5af0c049648ee1f3e54bb292a040cb1810", "bytes": 259364 }, { "path": "work/geophysics-site/data/etna-precision.json", "sha256": "fbb584d96d99c3d290f1d30fec70104f99fe7dec399b99e27481b2a8348f2081", "bytes": 363855 }, { "path": "work/etna-physical-scenario/prepared-top-extension-cavity-format-v1/preflight/manifest.json", "sha256": "bc9fa1ca269c8adbec557999ed2299c1a977df65543479064f57d545a1e14457", "bytes": 10705 }, { "path": "work/etna-physical-scenario/prepared-top-extension-cavity-format-v1/production-candidate/manifest.json", "sha256": "89e6ee9d78213c8393c6a9a74272b25cda9d704a42af51dad2e597d27cb08d1e", "bytes": 11077 }, { "path": "work/prepare_etna_observations.py", "sha256": "78df115ab2a98de4d9014049fc7c2d815cf61941d50440b60c1761726dafcbd6", "bytes": 16690 }, { "path": "work/etna-model-data/extended-context/fiandaca2018-emcn-evrn-900s.mseed", "sha256": "3165133544af7daf1faa5e3fb99a7143be06ced9c54ad080f683d70e87958339", "bytes": 1637888 }, { "path": "work/etna-model-data/extended-context/request.json", "sha256": "5878b0be162345519eb2e6d2dff3ddd1d7b41dd1c7d6e81804d450d96a99e3bb", "bytes": 484 }, { "path": "work/etna-model-data/extended-context/validation.json", "sha256": "931aab43d7982c895fb352006a8380a7fdb74c9a01f590e20ac9ced017930616", "bytes": 2777 } ], "reproduction": { "script": "work/audit_etna_observation_readiness.py", "scriptSha256": "bf2c713ff6243eb73fb216eccf6b8e6056c2ecc2e3014b686cc481db2c3db6c4", "obspyVersion": "1.5.1", "numpyVersion": "2.5.3", "localOnly": true, "newSolverRuns": 0 }, "allInputsAndExistingProductsUnchanged": true }