Early-est:     South of Fiji Islands    2025.11.11-15:12:19.02    q:C      mb:4.5    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: 4.5 [12]    Mwp: - [0]    Mwpd: - [0] Region: South of Fiji Islands Origin Time: 2025.11.11-15:12:19.02 UTC Hypocenter: lat: -23.69°  lon: -178.14°  [+/-12km]    depth: 246km  [+/-22km] Location Quality: qualityCode:  C     stdErr: 1.8s   assocPhases: 36   usedPhases: 15 minDist: 15.4°   maxDist: 156.1°   AzGap: 155°   2ndAzGap: 194°   atten: -2.24 [+/-0.73] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 12km   azMaxHorUnc: 34° 68%ConfEllipsoid:   semiMajorAxisLength: 22km   majorAxisAzimuth: 84°   majorAxisPlunge: 81°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 210°   intermediateAxisPlunge: 5°   semiMinorAxisLength: 13km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.0 [6]    Td: -s [0]    Td*T50Ex: - [0]    To: 0.8s [5] Closest plate boundaries:    Kermadec - Australia [continental rift boundary]: distance: ~90km    Kermadec - Tonga [continental rift boundary]: distance: ~90km    Tonga - Australia [continental rift boundary]: distance: ~90km    Kermadec / Pacific [subduction zone]: distance: ~310km    Tonga / Pacific [subduction zone]: distance: ~320km Subduction geometry:    Zone: Kermadec-Tonga    Slab depth at epicenter: 297km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (310km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        246km        246km        246km Slab depth at epicenter:        297km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 248°   dip: 46°   rake: -63° Nodal Plane 2: strike: 31°   dip: 51°   rake: -115° Quality: azimuthalGap: -1°   stationPolarityCount: 13   misfitWeightCount: 5.0   misfit: 0.07   stationDistributionRatio: 0.59   meanDistP: 35.0   meanDistT: 44.3   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: 155°   stationPolarityCount: 13   misfit: 0.99   stationDistributionRatio: 0.74   rmsAngDiffAccPref: 41.43   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/1762873939021
Event info last updated: 2025.11.11-16:15:48 UTC
Event first association/location: 2025.11.11-16:15:48 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI