Early-est:     South of Fiji Islands    2025.12.16-11:39:32.73    q:A      mb:4.7    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: 4.7 [35]    Mwp: - [0]    Mwpd: - [0] Region: South of Fiji Islands Origin Time: 2025.12.16-11:39:32.73 UTC Hypocenter: lat: -26.00°  lon: 179.78°  [+/-7km]    depth: 501km  [+/-9km] Location Quality: qualityCode:  A     stdErr: 0.9s   assocPhases: 80   usedPhases: 44 minDist: 8.4°   maxDist: 147.7°   AzGap: 92°   2ndAzGap: 123°   atten: -1.19 [+/-0.26] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 6km   maxHorUnc: 7km   azMaxHorUnc: 75° 68%ConfEllipsoid:   semiMajorAxisLength: 10km   majorAxisAzimuth: 104°   majorAxisPlunge: 61°   semiIntermediateAxisLength: 8km   intermediateAxisAzimuth: 239°   intermediateAxisPlunge: 22°   semiMinorAxisLength: 7km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.0 [27]    Td: 0.6Xs [1]    Td*T50Ex: - [0]    To: 1.2s [18] Closest plate boundaries: Subduction geometry:    Zone: Kermadec-Tonga    Slab depth at epicenter: 485km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  no  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        501km        501km        501km Slab depth at epicenter:        485km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 173°   dip: 14°   rake: 39° Nodal Plane 2: strike: 45°   dip: 81°   rake: 101° Quality: azimuthalGap: -1°   stationPolarityCount: 40   misfitWeightCount: 13.3   misfit: 0.23   stationDistributionRatio: 0.51   meanDistP: 35.0   meanDistT: 27.0   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 319°   dip: 74°   rake: 114° Nodal Plane 2: strike: 81°   dip: 29°   rake: 36° Quality: azimuthalGap: 72°   stationPolarityCount: 40   misfit: 0.37   stationDistributionRatio: 0.59   rmsAngDiffAccPref: 39.46   fracAcc30degPref: 0.50   qualityCode: D 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/1765885172261
Event info last updated: 2025.12.16-12:40:05 UTC
Event first association/location: 2025.12.16-11:44:03 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI