Early-est:     Fiji Islands Region    2026.10.11-10:05:43.14    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 [44]    Mwp: - [0]    Mwpd: - [0] Region: Fiji Islands Region Origin Time: 2026.10.11-10:05:43.14 UTC Hypocenter: lat: -20.44°  lon: -177.61°  [+/-15km]    depth: 524km  [+/-18km] Location Quality: qualityCode:  A     stdErr: 1.0s   assocPhases: 106   usedPhases: 82 minDist: 4.9°   maxDist: 155.8°   AzGap: 92°   2ndAzGap: 122°   atten: -1.13 [+/-0.19] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 15km   azMaxHorUnc: 127° 68%ConfEllipsoid:   semiMajorAxisLength: 20km   majorAxisAzimuth: 130°   majorAxisPlunge: 39°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 256°   intermediateAxisPlunge: 36°   semiMinorAxisLength: 16km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.0 [24]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.0s [20] Closest plate boundaries:    Tonga - Australia [oceanic spreading ridge]: distance: ~150km    Niuafo'ou - Australia [oceanic transform fault]: distance: ~180km Subduction geometry:    Zone: Kermadec-Tonga    Slab depth at epicenter: 439km 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:        524km        524km        524km Slab depth at epicenter:        439km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 106°   dip: 39°   rake: -155° Nodal Plane 2: strike: 356°   dip: 75°   rake: -54° Quality: azimuthalGap: -1°   stationPolarityCount: 69   misfitWeightCount: 15.8   misfit: 0.24   stationDistributionRatio: 0.54   meanDistP: 41.9   meanDistT: 30.6   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 82°   dip: 43°   rake: -155° Nodal Plane 2: strike: 333°   dip: 73°   rake: -50° Quality: azimuthalGap: 71°   stationPolarityCount: 69   misfit: 0.30   stationDistributionRatio: 0.58   rmsAngDiffAccPref: 31.52   fracAcc30degPref: 0.70   qualityCode: C 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: nan° Nodal Plane 2: strike: nan°   dip: nan°   rake: nan° 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: nan° Nodal Plane 2: strike: nan°   dip: nan°   rake: nan° 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/1791713142976
Event info last updated: 2026.10.11-11:05:52 UTC
Event first association/location: 2026.10.11-10:09:30 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI