Early-est:     Celebes Sea    2026.10.06-19:59:16.46    q:C      mb:4.2    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: 4.2 [12]    Mwp: - [0]    Mwpd: - [0] Region: Celebes Sea Origin Time: 2026.10.06-19:59:16.46 UTC Hypocenter: lat: 3.35°  lon: 122.66°  [+/-18km]    depth: 557km  [+/-18km] Location Quality: qualityCode:  C     stdErr: 0.8s   assocPhases: 35   usedPhases: 13 minDist: 10.5°   maxDist: 60.0°   AzGap: 138°   2ndAzGap: 176°   atten: 0.04 [+/-0.78] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 18km   azMaxHorUnc: 24° 68%ConfEllipsoid:   semiMajorAxisLength: 23km   majorAxisAzimuth: 21°   majorAxisPlunge: 18°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 260°   intermediateAxisPlunge: 58°   semiMinorAxisLength: 16km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.0 [5]    Td: -s [0]    Td*T50Ex: - [0]    To: 0.8s [4] Closest plate boundaries:    Molucca Sea / Sunda [subduction zone]: distance: ~110km    Molucca Sea - Sunda [oceanic transform fault]: distance: ~170km    Birds Head / Sunda [subduction zone]: distance: ~460km    Molucca Sea \ Sunda [subduction zone]: distance: ~460km    Molucca Sea \ Birds Head [subduction zone]: distance: ~460km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (110km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        557km        557km        557km Slab depth at epicenter:        n/a        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 341°   dip: 8°   rake: -71° Nodal Plane 2: strike: 142°   dip: 82°   rake: -93° Quality: azimuthalGap: -1°   stationPolarityCount: 11   misfitWeightCount: 4.8   misfit: 0.08   stationDistributionRatio: 0.44   meanDistP: 34.4   meanDistT: 47.5   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: 240°   dip: 41°   rake: -139° Nodal Plane 2: strike: 116°   dip: 64°   rake: -57° Quality: azimuthalGap: 138°   stationPolarityCount: 11   misfit: 0.21   stationDistributionRatio: 0.78   rmsAngDiffAccPref: 32.05   fracAcc30degPref: 0.71   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/1791316756652
Event info last updated: 2026.10.06-20:59:21 UTC
Event first association/location: 2026.10.06-20:05:25 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI