Early-est:     Kermadec Islands Region    2026.10.06-13:26:22.06    q:B      mb:4.3    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1791293183271.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1791293183271.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1791293183271.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1791293183271.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 [22]    Mwp: - [0]    Mwpd: - [0]
Region: Kermadec Islands Region
Origin Time: 2026.10.06-13:26:22.06 UTC
Hypocenter: lat: -30.85°  lon: 178.91°  [+/-15km]    depth: 520km  [+/-14km]
Location Quality: qualityCode:  B     stdErr: 0.9s   assocPhases: 55   usedPhases: 30
minDist: 3.2°   maxDist: 155.7°   AzGap: 82°   2ndAzGap: 130°   atten: -0.56 [+/-0.30]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 15km   azMaxHorUnc: 39°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 39°   majorAxisPlunge: 12°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 130°   intermediateAxisPlunge: 2°   semiMinorAxisLength: 13km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.0 [16]    Td: 4.7Xs [2]    Td*T50Ex: - [0]    To: 0.9s [12]
Closest plate boundaries:
   Kermadec - Australia [oceanic spreading ridge]: distance: ~160km
   Kermadec / Pacific [subduction zone]: distance: ~360km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (360km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       520km
       520km
       520km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1791293183271.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 34°   dip: 26°   rake: 89°
Nodal Plane 2: strike: 216°   dip: 64°   rake: 91°
Quality: azimuthalGap: -1°   stationPolarityCount: 31   misfitWeightCount: 8.5   misfit: 0.14   stationDistributionRatio: 0.60   meanDistP: 27.4   meanDistT: 34.7   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1791293183271.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 74°   dip: 36°   rake: 145°
Nodal Plane 2: strike: 193°   dip: 70°   rake: 59°
Quality: azimuthalGap: 98°   stationPolarityCount: 31   misfit: 0.32   stationDistributionRatio: 0.46   rmsAngDiffAccPref: 36.70   fracAcc30degPref: 0.65   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1791293183271.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.1791293183271.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.1791293183271.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1791293183271
Event info last updated: 2026.10.06-14:27:03 UTC
Event first association/location: 2026.10.06-13:31:14 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI