Early-est:     Fiji Islands Region    2026.10.09-08:27:10.74    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 [53]    Mwp: 4.9X [1]    Mwpd: - [0] Region: Fiji Islands Region Origin Time: 2026.10.09-08:27:10.74 UTC Hypocenter: lat: -18.05°  lon: -179.67°  [+/-15km]    depth: 637km  [+/-18km] Location Quality: qualityCode:  A     stdErr: 1.4s   assocPhases: 145   usedPhases: 116 minDist: 2.2°   maxDist: 155.7°   AzGap: 35°   2ndAzGap: 64°   atten: -1.61 [+/-0.20] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 15km   azMaxHorUnc: 104° 68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 107°   majorAxisPlunge: 28°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 268°   intermediateAxisPlunge: 61°   semiMinorAxisLength: 15km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.0 [37]    Td: 0.7Xs [1]    Td*T50Ex: - [0]    To: 1.3s [31] Closest plate boundaries: Subduction geometry:    Zone: Kermadec-Tonga    Slab depth at epicenter: 605km 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:        637km        637km        637km Slab depth at epicenter:        605km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY): Nodal Plane 1: strike: 90°   dip: 45°   rake: -170° Nodal Plane 2: strike: 353°   dip: 83°   rake: -46° Quality: azimuthalGap: -1°   stationPolarityCount: 98   misfitWeightCount: 23.0   misfit: 0.18   stationDistributionRatio: 0.56   meanDistP: 17.5   meanDistT: 21.9   qualityCode: B 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: 198°   dip: 71°   rake: 107° Nodal Plane 2: strike: 335°   dip: 25°   rake: 50° Quality: azimuthalGap: 45°   stationPolarityCount: 98   misfit: 0.34   stationDistributionRatio: 0.54   rmsAngDiffAccPref: 39.19   fracAcc30degPref: 0.44   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: 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/1791534430299
Event info last updated: 2026.10.09-09:28:04 UTC
Event first association/location: 2026.10.09-08:32:17 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI