Early-est:     Kermadec Islands Region    2026.10.10-20:35:48.48    q:B      mb:4.9    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: 4.9 [29]    Mwp: - [0]    Mwpd: - [0] Region: Kermadec Islands Region Origin Time: 2026.10.10-20:35:48.48 UTC Hypocenter: lat: -31.49°  lon: -178.82°  [+/-19km]    depth: 93km  [+/-22km] Location Quality: qualityCode:  B     stdErr: 2.0s   assocPhases: 89   usedPhases: 62 minDist: 2.4°   maxDist: 164.3°   AzGap: 107°   2ndAzGap: 139°   atten: -0.95 [+/-0.33] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 19km   azMaxHorUnc: 76° 68%ConfEllipsoid:   semiMajorAxisLength: 28km   majorAxisAzimuth: 73°   majorAxisPlunge: 41°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 323°   intermediateAxisPlunge: 22°   semiMinorAxisLength: 15km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.0 [18]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.6s [17] Closest plate boundaries:    Kermadec - Australia [oceanic spreading ridge]: distance: ~70km    Kermadec / Pacific [subduction zone]: distance: ~130km Subduction geometry:    Zone: Kermadec-Tonga    Slab depth at epicenter: 99km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (130km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        93km        93km        93km Slab depth at epicenter:        99km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 294°   dip: 48°   rake: 158° Nodal Plane 2: strike: 39°   dip: 74°   rake: 44° Quality: azimuthalGap: -1°   stationPolarityCount: 59   misfitWeightCount: 8.5   misfit: 0.18   stationDistributionRatio: 0.49   meanDistP: 45.5   meanDistT: 41.8   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: 129°   dip: 82°   rake: 178° Nodal Plane 2: strike: 220°   dip: 88°   rake: 8° Quality: azimuthalGap: 60°   stationPolarityCount: 59   misfit: 0.38   stationDistributionRatio: 0.44   rmsAngDiffAccPref: 18.83   fracAcc30degPref: 0.98   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/1791664545587
Event info last updated: 2026.10.10-21:36:02 UTC
Event first association/location: 2026.10.10-20:42:02 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI