Early-est:     Fiji Islands Region    2025.11.09-02:46:19.30    q:B      mb:4.1    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: 4.1 [9]    Mwp: - [0]    Mwpd: - [0] Region: Fiji Islands Region Origin Time: 2025.11.09-02:46:19.30 UTC Hypocenter: lat: -20.64°  lon: -178.19°  [+/-14km]    depth: 532km  [+/-17km] Location Quality: qualityCode:  B     stdErr: 0.8s   assocPhases: 54   usedPhases: 31 minDist: 4.6°   maxDist: 151.3°   AzGap: 105°   2ndAzGap: 112°   atten: -1.33 [+/-0.35] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 14km   azMaxHorUnc: 25° 68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 28°   majorAxisPlunge: 34°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 153°   intermediateAxisPlunge: 40°   semiMinorAxisLength: 16km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.0 [6]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.1s [4] Closest plate boundaries: Subduction geometry:    Zone: Kermadec-Tonga    Slab depth at epicenter: 523km 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:        532km        532km        532km Slab depth at epicenter:        523km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 159°   dip: 8°   rake: -97° Nodal Plane 2: strike: 346°   dip: 83°   rake: -89° Quality: azimuthalGap: -1°   stationPolarityCount: 30   misfitWeightCount: 6.8   misfit: 0.15   stationDistributionRatio: 0.50   meanDistP: 32.7   meanDistT: 41.2   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: 152°   dip: 82°   rake: 134° Nodal Plane 2: strike: 250°   dip: 45°   rake: 11° Quality: azimuthalGap: 70°   stationPolarityCount: 30   misfit: 0.32   stationDistributionRatio: 0.45   rmsAngDiffAccPref: 34.61   fracAcc30degPref: 0.70   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/1762656379102
Event info last updated: 2025.11.09-03:46:44 UTC
Event first association/location: 2025.11.09-02:53:05 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI