Early-est:     Queen Charlotte Islands Region    2025.02.03-00:25:37.88    q:C      mb:4.2    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:     hash:     fmamp_amp_aref:     fmamp_amp_mwp:

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details: Magnitude: mb: 4.2 [12]    Mwp: - [0]    Mwpd: - [0] Region: Queen Charlotte Islands Region Origin Time: 2025.02.03-00:25:37.88 UTC Hypocenter: lat: 51.53°  lon: -131.14°  [+/-17km]    depth: 1km  [+/-15km] Location Quality: qualityCode:  C     stdErr: 2.3s   assocPhases: 15   usedPhases: 14 minDist: 1.9°   maxDist: 81.0°   AzGap: 174°   2ndAzGap: 191°   atten: 0.35 [+/-0.49] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 17km   azMaxHorUnc: 29° 68%ConfEllipsoid:   semiMajorAxisLength: 22km   majorAxisAzimuth: 213°   majorAxisPlunge: 21°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 309°   intermediateAxisPlunge: 14°   semiMinorAxisLength: 13km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [8]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.9s [4] Closest plate boundaries:    North America - Pacific [continental convergent boundary]: distance: ~20km    Juan de Fuca \ North America [subduction zone]: distance: ~20km    Pacific - Juan de Fuca [oceanic spreading ridge]: distance: ~20km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (20km)  YES (20km)  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        1km        1km        1km Slab depth at epicenter:        n/a        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 138°   dip: 11°   rake: -19° Nodal Plane 2: strike: 247°   dip: 86°   rake: -101° Quality: azimuthalGap: -1°   stationPolarityCount: 14   misfitWeightCount: 5.3   misfit: 0.11   stationDistributionRatio: 0.42   meanDistP: 47.6   meanDistT: 35.4   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (No solution available) Nodal Plane 1: strike: 999°   dip: 99°   rake: 999° Nodal Plane 2: strike: 324°   dip: 13°   rake: 135° Quality: azimuthalGap: 207°   stationPolarityCount: 12   misfit: 0.99   stationDistributionRatio: 0.72   rmsAngDiffAccPref: 21.82   fracAcc30degPref: 0.00   qualityCode: E Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (No solution available) Nodal Plane 1: strike: 0°   dip: 0°   rake: 0° Nodal Plane 2: strike: 270°   dip: 90°   rake: 90° Quality: azimuthalGap: -1°   stationPolarityCount: 0   misfitWeightCount: -1.0   misfit: -1.00   stationDistributionRatio: -1.00   meanDistP: -1.0   meanDistT: -1.0   qualityCode: X Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_aref
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (No solution available) Nodal Plane 1: strike: 0°   dip: 0°   rake: 0° Nodal Plane 2: strike: 270°   dip: 90°   rake: 90° Quality: azimuthalGap: -1°   stationPolarityCount: 0   misfitWeightCount: -1.0   misfit: -1.00   stationDistributionRatio: -1.00   meanDistP: -1.0   meanDistT: -1.0   qualityCode: X Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_mwp

Event ID: smi:KOERI/ee/event/1738542339670
Event info last updated: 2025.02.03-01:25:42 UTC
Event first association/location: 2025.02.03-00:31:16 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI