Early-est:     Fiji Islands Region    2025.02.02-16:23:07.35    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 [8]    Mwp: - [0]    Mwpd: - [0] Region: Fiji Islands Region Origin Time: 2025.02.02-16:23:07.35 UTC Hypocenter: lat: -20.05°  lon: -177.41°  [+/-14km]    depth: 373km  [+/-17km] Location Quality: qualityCode:  B     stdErr: 0.9s   assocPhases: 39   usedPhases: 10 minDist: 4.9°   maxDist: 155.2°   AzGap: 102°   2ndAzGap: 143°   atten: -1.61 [+/-0.30] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 14km   azMaxHorUnc: 180° 68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 6°   majorAxisPlunge: 44°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 149°   intermediateAxisPlunge: 40°   semiMinorAxisLength: 15km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4X [3]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.6Xs [1] Closest plate boundaries:    Tonga - Australia [oceanic transform fault]: distance: ~130km    Niuafo'ou - Australia [oceanic transform fault]: distance: ~130km    Tonga - Niuafo'ou [continental convergent boundary]: distance: ~170km    Tonga / Pacific [subduction zone]: distance: ~410km Subduction geometry:    Zone: Kermadec-Tonga    Slab depth at epicenter: 431km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (410km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        373km        373km        373km Slab depth at epicenter:        431km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 10°   dip: 47°   rake: 124° Nodal Plane 2: strike: 145°   dip: 53°   rake: 59° Quality: azimuthalGap: -1°   stationPolarityCount: 10   misfitWeightCount: 5.2   misfit: 0.05   stationDistributionRatio: 0.63   meanDistP: 35.7   meanDistT: 32.2   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (No solution available) Nodal Plane 1: strike: 999°   dip: 99°   rake: 999° Nodal Plane 2: strike: 324°   dip: 13°   rake: 135° Quality: azimuthalGap: 164°   stationPolarityCount: 10   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E 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/1738513387350
Event info last updated: 2025.02.02-17:24:45 UTC
Event first association/location: 2025.02.02-17:16:02 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI