Early-est:     South of Fiji Islands    2025.02.01-13:52:25.03    q:B      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 [22]    Mwp: - [0]    Mwpd: - [0] Region: South of Fiji Islands Origin Time: 2025.02.01-13:52:25.03 UTC Hypocenter: lat: -23.60°  lon: -176.43°  [+/-12km]    depth: 188km  [+/-15km] Location Quality: qualityCode:  B     stdErr: 1.6s   assocPhases: 59   usedPhases: 29 minDist: 7.8°   maxDist: 158.1°   AzGap: 115°   2ndAzGap: 151°   atten: -1.71 [+/-0.30] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 10km   maxHorUnc: 12km   azMaxHorUnc: 93° 68%ConfEllipsoid:   semiMajorAxisLength: 16km   majorAxisAzimuth: 83°   majorAxisPlunge: 46°   semiIntermediateAxisLength: 14km   intermediateAxisAzimuth: 295°   intermediateAxisPlunge: 39°   semiMinorAxisLength: 12km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [16]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.9s [11] Closest plate boundaries:    Kermadec - Tonga [continental transform fault]: distance: ~40km    Tonga - Australia [continental rift boundary]: distance: ~70km    Kermadec - Australia [continental rift boundary]: distance: ~110km    Kermadec / Pacific [subduction zone]: distance: ~140km    Tonga / Pacific [subduction zone]: distance: ~150km Subduction geometry:    Zone: Kermadec-Tonga    Slab depth at epicenter: 64km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (140km)  no  YES (40km) Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        188km        188km        188km Slab depth at epicenter:        64km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 272°   dip: 12°   rake: -143° Nodal Plane 2: strike: 145°   dip: 83°   rake: -80° Quality: azimuthalGap: -1°   stationPolarityCount: 28   misfitWeightCount: 5.9   misfit: 0.11   stationDistributionRatio: 0.40   meanDistP: 33.8   meanDistT: 44.2   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: 187°   dip: 41°   rake: 175° Nodal Plane 2: strike: 281°   dip: 87°   rake: 49° Quality: azimuthalGap: 75°   stationPolarityCount: 28   misfit: 0.23   stationDistributionRatio: 0.53   rmsAngDiffAccPref: 23.11   fracAcc30degPref: 0.85   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: 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/1738417942168
Event info last updated: 2025.02.01-14:53:02 UTC
Event first association/location: 2025.02.01-13:57:02 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI