Early-est:     South of Fiji Islands    2026.10.07-18:13:14.68    q:B      mb:4.2    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: 4.2 [22]    Mwp: - [0]    Mwpd: - [0] Region: South of Fiji Islands Origin Time: 2026.10.07-18:13:14.68 UTC Hypocenter: lat: -24.84°  lon: 179.82°  [+/-27km]    depth: 479km  [+/-32km] Location Quality: qualityCode:  B     stdErr: 1.0s   assocPhases: 66   usedPhases: 47 minDist: 7.3°   maxDist: 151.2°   AzGap: 186°   2ndAzGap: 203°   atten: -0.63 [+/-0.40] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 17km   maxHorUnc: 27km   azMaxHorUnc: 45° 68%ConfEllipsoid:   semiMajorAxisLength: 43km   majorAxisAzimuth: 45°   majorAxisPlunge: 43°   semiIntermediateAxisLength: 22km   intermediateAxisAzimuth: 136°   intermediateAxisPlunge: 1°   semiMinorAxisLength: 19km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.0 [13]    Td: -s [0]    Td*T50Ex: - [0]    To: 0.8s [11] Closest plate boundaries: Subduction geometry:    Zone: Kermadec-Tonga    Slab depth at epicenter: 506km 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:        479km        479km        479km Slab depth at epicenter:        506km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 21°   dip: 72°   rake: 163° Nodal Plane 2: strike: 117°   dip: 74°   rake: 19° Quality: azimuthalGap: -1°   stationPolarityCount: 41   misfitWeightCount: 6.5   misfit: 0.08   stationDistributionRatio: 0.40   meanDistP: 41.6   meanDistT: 42.2   qualityCode: D 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: 199°   dip: 69°   rake: 153° Nodal Plane 2: strike: 300°   dip: 65°   rake: 23° Quality: azimuthalGap: 124°   stationPolarityCount: 41   misfit: 0.25   stationDistributionRatio: 0.38   rmsAngDiffAccPref: 38.84   fracAcc30degPref: 0.35   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/1791396796583
Event info last updated: 2026.10.07-19:13:51 UTC
Event first association/location: 2026.10.07-18:20:04 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI