Early-est:     South of Fiji Islands    2026.10.07-10:20:32.41    q:A      mb:4.3    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1791368432085.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1791368432085.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1791368432085.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1791368432085.mech.fmamp_amp_mwp.thumb.jpg

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details:
Magnitude: mb: 4.3 [32]    Mwp: - [0]    Mwpd: - [0]
Region: South of Fiji Islands
Origin Time: 2026.10.07-10:20:32.41 UTC
Hypocenter: lat: -24.38°  lon: -179.92°  [+/-14km]    depth: 505km  [+/-18km]
Location Quality: qualityCode:  A     stdErr: 1.0s   assocPhases: 69   usedPhases: 49
minDist: 6.9°   maxDist: 151.8°   AzGap: 77°   2ndAzGap: 81°   atten: -1.08 [+/-0.22]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 14km   azMaxHorUnc: 153°
68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 127°   majorAxisPlunge: 62°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 358°   intermediateAxisPlunge: 19°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.0 [19]    Td: 5.6Xs [1]    Td*T50Ex: - [0]    To: 1.1s [16]
Closest plate boundaries:
Subduction geometry:    Zone: Kermadec-Tonga    Slab depth at epicenter: 495km
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:
       505km
       505km
       505km
Slab depth at epicenter:
       495km
       -
       -
./hypo.1791368432085.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 174°   dip: 54°   rake: 15°
Nodal Plane 2: strike: 75°   dip: 78°   rake: 143°
Quality: azimuthalGap: -1°   stationPolarityCount: 42   misfitWeightCount: 13.8   misfit: 0.23   stationDistributionRatio: 0.42   meanDistP: 48.5   meanDistT: 39.5   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1791368432085.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 244°   dip: 81°   rake: -127°
Nodal Plane 2: strike: 143°   dip: 38°   rake: -14°
Quality: azimuthalGap: 81°   stationPolarityCount: 42   misfit: 0.43   stationDistributionRatio: 0.55   rmsAngDiffAccPref: 25.98   fracAcc30degPref: 0.92   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1791368432085.mech.hash.mechanism.jpg
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
./hypo.1791368432085.mech.fmamp_amp_aref.mechanism.jpg
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
./hypo.1791368432085.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1791368432085
Event info last updated: 2026.10.07-11:20:41 UTC
Event first association/location: 2026.10.07-10:26:25 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI