{ "schemaVersion": 1, "status": "SOURCE_ALTERNATIVES_PREPARED_NOT_SIMULATED", "eventId": "iside:21285011", "quakemlSha256": "53dec295d5441c38ef00a218838a744769516cd1748fed86e34d50d46a5a61fa", "solverCommit": "7a1c76454396f8dd2f5a67ea524ca372e2c91993", "projectionLibrary": "pyproj 3.8.0, PROJ 9.8.1", "tensorOriginalUSE_Nm": [ [ -1139090000000000.0, 9024960000000000.0, -5402680000000000.0 ], [ 9024960000000000.0, -2.351043e+16, -8641400000000000.0 ], [ -5402680000000000.0, -8641400000000000.0, 2.464951e+16 ] ], "scalarMomentNm": 2.76774e+16, "sourceTimeFunction": null, "sourceTimeFunctionNote": "No rupture duration or source-time function provided by the retrieved QuakeML; any finite-duration source must be an explicit scenario assumption and sensitivity parameter.", "sourceAlternatives": [ { "id": "tdmt-centroid", "originResourceId": "smi:webservices.ingv.it/fdsnws/event/1/query?originId=64237231", "basis": "Original TDMT centroid position. Depth is operator assigned, not the preferred hypocentre.", "time": "2018-12-26T02:19:14.000000Z", "lon": 15.102, "lat": 37.625, "depthMeters": 3000.0, "depthType": "operator assigned", "sourcePositionUTM33Meters": [ 509000.73814713524, 4164214.210258334, -3000.0 ], "verticalCondition": "z=-depth is valid only after reconciling mesh and QuakeML vertical datum; no extra terrain subtraction.", "meridianConvergenceDegrees": 0.062270104150321394, "meridianDirectionCheckDegrees": 0.0622701030383809, "momentTensorGridENU_Nm": [ [ 2.4630669865480864e+16, 8693720650985110.0, -5392868319105678.0 ], [ 8693720650985110.0, -2.349158986548086e+16, -9030826400545318.0 ], [ -5392868319105678.0, -9030826400545318.0, -1139090000000000.0 ] ], "cmtFieldsDyneCm": { "Mrr": -1.13909e+22, "Mtt": -2.349158986548086e+23, "Mpp": 2.4630669865480863e+23, "Mrt": 9.030826400545318e+22, "Mrp": -5.392868319105678e+22, "Mtp": -8.69372065098511e+22 }, "solverFlags": { "UTM_PROJECTION_ZONE": 33, "SUPPRESS_UTM_PROJECTION": true, "USE_SOURCES_RECEIVERS_Z": true }, "solverPositionFields": { "longitude": 509000.73814713524, "latitude": 4164214.210258334, "depth": -3000.0 }, "flagExplanation": "With UTM projection suppressed the CMT longitude field is Cartesian x, latitude is Cartesian y. USE_SOURCES_RECEIVERS_Z means the depth field is Cartesian z in metres. The tensor is already rotated into these grid axes; do not rotate again." }, { "id": "preferred-hypocentre-sensitivity", "originResourceId": "smi:webservices.ingv.it/fdsnws/event/1/query?originId=64733411", "basis": "Sensitivity experiment relocating the moment-tensor source at the preferred hypocentre; not the original TDMT inversion source.", "time": "2018-12-26T02:19:14.000000Z", "lon": 15.116, "lat": 37.644, "depthMeters": -300.0, "depthType": "from location", "sourcePositionUTM33Meters": [ 510233.5280091511, 4166323.60450497, 300.0 ], "verticalCondition": "z=-depth is valid only after reconciling mesh and QuakeML vertical datum; no extra terrain subtraction.", "meridianConvergenceDegrees": 0.07084745803995274, "meridianDirectionCheckDegrees": 0.07084745819220865, "momentTensorGridENU_Nm": [ [ 2.4628065833770212e+16, 8700924311055199.0, -5391516316275885.0 ], [ 8700924311055199.0, -2.3488985833770212e+16, -9031633628271848.0 ], [ -5391516316275885.0, -9031633628271850.0, -1139090000000000.0 ] ], "cmtFieldsDyneCm": { "Mrr": -1.13909e+22, "Mtt": -2.348898583377021e+23, "Mpp": 2.462806583377021e+23, "Mrt": 9.031633628271848e+22, "Mrp": -5.391516316275885e+22, "Mtp": -8.700924311055198e+22 }, "solverFlags": { "UTM_PROJECTION_ZONE": 33, "SUPPRESS_UTM_PROJECTION": true, "USE_SOURCES_RECEIVERS_Z": true }, "solverPositionFields": { "longitude": 510233.5280091511, "latitude": 4166323.60450497, "depth": 300.0 }, "flagExplanation": "With UTM projection suppressed the CMT longitude field is Cartesian x, latitude is Cartesian y. USE_SOURCES_RECEIVERS_Z means the depth field is Cartesian z in metres. The tensor is already rotated into these grid axes; do not rotate again." } ], "velocityModels": [ { "name": "STARTING-3D-model", "nodeCount": 7935, "dimensionsLonLatDepth": [ 23, 23, 15 ], "depthsKm": [ -2.0, -1.0, 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 9.0, 12.0, 15.0, 18.0, 25.0, 30.0 ], "vpRangeKms": [ 2.28, 7.81 ], "vsRangeKms": [ 1.33333, 4.51445 ], "vpVsRange": [ 1.5900003148515474, 1.8500020686924092 ], "sha256": "1912675fcfac85f335cb5ca3597875e718e0ae8e8062e04878282846269aa130", "geographicBasis": "Longitude/latitude degrees as published; precise horizontal datum and vertical CRS are not specified in the readme.", "sourceUrl": "ftp://ftp.ingv.it/pub/pasquale.degori/COMMSENV-21-0279B/STARTING-3D-model/mod.dat", "licenseStatus": "No dataset-specific license in FTP readme; CC BY interpretation follows general INGV policy, separately from the article CC BY license.", "resolutionMaskAvailable": false, "epochCaution": "The final 2019–2021 model postdates the 2018 event. The starting static model is a distinct input; neither is assumed an exact 2018 Earth model." }, { "name": "TOMOGRAPHIC-MODEL-2019-2021", "nodeCount": 7935, "dimensionsLonLatDepth": [ 23, 23, 15 ], "depthsKm": [ -2.0, -1.0, 0.0, 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 9.0, 12.0, 15.0, 18.0, 25.0, 30.0 ], "vpRangeKms": [ 2.29, 7.81 ], "vsRangeKms": [ 1.31609, 4.51445 ], "vpVsRange": [ 1.5999999999999999, 1.860001143017462 ], "sha256": "3fdcc67be7e17b634b7f2e1edbd52c2729c3568bc05b3ff5c39aed30acd7c992", "geographicBasis": "Longitude/latitude degrees as published; precise horizontal datum and vertical CRS are not specified in the readme.", "sourceUrl": "ftp://ftp.ingv.it/pub/pasquale.degori/COMMSENV-21-0279B/TOMOGRAPHIC-MODEL-2019-2021/mod.dat", "licenseStatus": "No dataset-specific license in FTP readme; CC BY interpretation follows general INGV policy, separately from the article CC BY license.", "resolutionMaskAvailable": false, "epochCaution": "The final 2019–2021 model postdates the 2018 event. The starting static model is a distinct input; neither is assumed an exact 2018 Earth model." } ], "referenceChecks": { "tensorRoundTrip": "PASS", "tensorNormConserved": "PASS", "meridianConvergenceSign": "PASS", "sourceVerticalSign": "z=-QuakeML depth, in metres, conditional on compatible vertical datum", "actualVsPresent": "PASS; Vs are source values, not a fixed Vp/Vs assumption" }, "requiredForEventValidation": [ "Construct a topographic mesh and verify actual located source/receiver coordinates against requested coordinates.", "Reconcile source, station and topographic vertical references and acquisition epochs.", "Choose and document density and attenuation models, with uncertainty; they are absent from these Vp/Vs files.", "Keep unresolved cells and weak Vs resolution explicit; SF/DWS masks are not included in the FTP models.", "Freeze source time-function assumptions and ensemble choices before waveform comparison.", "Select resolved frequency band from mesh wavelength/CFL checks, then apply identical filters to synthetic and observed traces.", "Check time-step, mesh and boundary sensitivity; reserve independent observations for validation." ], "sources": { "solverTensor": "https://github.com/SPECFEM/specfem3d/blob/7a1c76454396f8dd2f5a67ea524ca372e2c91993/src/specfem3D/locate_source.F90#L202", "solverUnits": "https://github.com/SPECFEM/specfem3d/blob/7a1c76454396f8dd2f5a67ea524ca372e2c91993/src/specfem3D/get_cmt.f90#L414", "solverVertical": "https://github.com/SPECFEM/specfem3d/blob/7a1c76454396f8dd2f5a67ea524ca372e2c91993/src/specfem3D/locate_source.F90#L191", "velocityStudy": "https://www.nature.com/articles/s43247-021-00282-9", "dataPolicy": "https://data.ingv.it/docs/implementation/" } }