Early-est:     South of Fiji Islands    2026.10.10-13:40:43.69    q:B      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 [35]    Mwp: - [0]    Mwpd: - [0] Region: South of Fiji Islands Origin Time: 2026.10.10-13:40:43.69 UTC Hypocenter: lat: -22.28°  lon: -179.46°  [+/-19km]    depth: 566km  [+/-18km] Location Quality: qualityCode:  B     stdErr: 1.2s   assocPhases: 109   usedPhases: 66 minDist: 5.1°   maxDist: 156.7°   AzGap: 77°   2ndAzGap: 107°   atten: -1.18 [+/-0.20] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 15km   maxHorUnc: 19km   azMaxHorUnc: 32° 68%ConfEllipsoid:   semiMajorAxisLength: 23km   majorAxisAzimuth: 209°   majorAxisPlunge: 14°   semiIntermediateAxisLength: 19km   intermediateAxisAzimuth: 107°   intermediateAxisPlunge: 41°   semiMinorAxisLength: 17km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.0 [17]    Td: -s [0]    Td*T50Ex: - [0]    To: 0.8s [13] Closest plate boundaries: Subduction geometry:    Zone: Kermadec-Tonga    Slab depth at epicenter: 569km 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:        566km        566km        566km Slab depth at epicenter:        569km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 56°   dip: 30°   rake: -93° Nodal Plane 2: strike: 239°   dip: 60°   rake: -88° Quality: azimuthalGap: -1°   stationPolarityCount: 61   misfitWeightCount: 14.8   misfit: 0.23   stationDistributionRatio: 0.48   meanDistP: 25.6   meanDistT: 49.4   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: 168°   dip: 69°   rake: 168° Nodal Plane 2: strike: 262°   dip: 79°   rake: 22° Quality: azimuthalGap: 53°   stationPolarityCount: 61   misfit: 0.43   stationDistributionRatio: 0.49   rmsAngDiffAccPref: 27.55   fracAcc30degPref: 0.88   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: 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/1791639644350
Event info last updated: 2026.10.10-14:41:03 UTC
Event first association/location: 2026.10.10-13:49:03 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI