Early-est:     South of Fiji Islands    2025.06.08-09:36:02.27    q:B      mb:4.8    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: 4.8 [45]    Mwp: - [0]    Mwpd: - [0] Region: South of Fiji Islands Origin Time: 2025.06.08-09:36:02.27 UTC Hypocenter: lat: -25.18°  lon: -176.87°  [+/-32km]    depth: 180km  [+/-45km] Location Quality: qualityCode:  B     stdErr: 1.6s   assocPhases: 135   usedPhases: 103 minDist: 8.8°   maxDist: 168.2°   AzGap: 54°   2ndAzGap: 82°   atten: -0.97 [+/-0.26] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 32km   azMaxHorUnc: 63° 68%ConfEllipsoid:   semiMajorAxisLength: 58km   majorAxisAzimuth: 243°   majorAxisPlunge: 50°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 64°   intermediateAxisPlunge: 40°   semiMinorAxisLength: 16km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [36]    Td: 0.9Xs [2]    Td*T50Ex: - [0]    To: 2.4s [27] Closest plate boundaries:    Kermadec - Australia [continental rift boundary]: distance: ~80km    Kermadec - Tonga [continental transform fault]: distance: ~130km    Tonga - Australia [continental rift boundary]: distance: ~130km    Kermadec / Pacific [subduction zone]: distance: ~160km    Tonga / Pacific [subduction zone]: distance: ~250km Subduction geometry:    Zone: Kermadec-Tonga    Slab depth at epicenter: 80km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (160km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        180km        180km        180km Slab depth at epicenter:        80km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 75°   dip: 39°   rake: -107° Nodal Plane 2: strike: 277°   dip: 53°   rake: -76° Quality: azimuthalGap: -1°   stationPolarityCount: 87   misfitWeightCount: 14.6   misfit: 0.26   stationDistributionRatio: 0.52   meanDistP: 41.3   meanDistT: 35.0   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: 221°   dip: 79°   rake: 148° Nodal Plane 2: strike: 318°   dip: 58°   rake: 12° Quality: azimuthalGap: 53°   stationPolarityCount: 88   misfit: 0.44   stationDistributionRatio: 0.51   rmsAngDiffAccPref: 21.63   fracAcc30degPref: 0.76   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/1749375352972
Event info last updated: 2025.06.08-10:37:14 UTC
Event first association/location: 2025.06.08-09:41:46 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI