Early-est:     New Britain Region, P.N.G.    2026.10.05-18:28:30.76    q:B      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 [8]    Mwp: - [0]    Mwpd: - [0] Region: New Britain Region, P.N.G. Origin Time: 2026.10.05-18:28:30.76 UTC Hypocenter: lat: -5.80°  lon: 150.49°  [+/-14km]    depth: 112km  [+/-16km] Location Quality: qualityCode:  B     stdErr: 1.8s   assocPhases: 16   usedPhases: 14 minDist: 2.3°   maxDist: 84.1°   AzGap: 118°   2ndAzGap: 159°   atten: -1.74 [+/-0.52] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 14km   azMaxHorUnc: 133° 68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 314°   majorAxisPlunge: 5°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 55°   intermediateAxisPlunge: 65°   semiMinorAxisLength: 14km Tsunamigeneic Assesment: Discriminants: Prob Underwater: <1% T50Ex: 0.5X [2]    Td: -s [0]    Td*T50Ex: - [0]    To: 4.2Xs [2] Closest plate boundaries:    South Bismarck / Solomon Sea [subduction zone]: distance: ~100km    Solomon Sea \ Woodlark [subduction zone]: distance: ~210km Subduction geometry:    Zone: Solomon Islands    Slab depth at epicenter: 44km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (100km)  no  no Prob underwater:  <1%  <1%  <1% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        112km        112km        112km Slab depth at epicenter:        44km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 323°   dip: 48°   rake: 155° Nodal Plane 2: strike: 70°   dip: 71°   rake: 44° Quality: azimuthalGap: -1°   stationPolarityCount: 14   misfitWeightCount: 7.1   misfit: 0.08   stationDistributionRatio: 0.63   meanDistP: 37.2   meanDistT: 29.0   qualityCode: C 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: 327°   dip: 51°   rake: 175° Nodal Plane 2: strike: 60°   dip: 86°   rake: 39° Quality: azimuthalGap: 118°   stationPolarityCount: 14   misfit: 0.16   stationDistributionRatio: 0.79   rmsAngDiffAccPref: 34.23   fracAcc30degPref: 0.66   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/1791224910730
Event info last updated: 2026.10.05-19:28:42 UTC
Event first association/location: 2026.10.05-18:33:02 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI