Early-est:     New Britain Region, P.N.G.    2026.10.13-16:28:15.79    q:B      mb:4.8    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: 4.8 [19]    Mwp: 4.6X [2]    Mwpd: - [0] Region: New Britain Region, P.N.G. Origin Time: 2026.10.13-16:28:15.79 UTC Hypocenter: lat: -5.48°  lon: 152.16°  [+/-16km]    depth: 16km  [+/-14km] Location Quality: qualityCode:  B     stdErr: 2.1s   assocPhases: 53   usedPhases: 22 minDist: 1.3°   maxDist: 117.3°   AzGap: 90°   2ndAzGap: 128°   atten: -0.94 [+/-0.28] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 16km   azMaxHorUnc: 111° 68%ConfEllipsoid:   semiMajorAxisLength: 21km   majorAxisAzimuth: 291°   majorAxisPlunge: 13°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 199°   intermediateAxisPlunge: 7°   semiMinorAxisLength: 14km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.5 [15]    Td: 1.6Xs [2]    Td*T50Ex: - [0]    To: 24.8s [10] Closest plate boundaries:    South Bismarck / Solomon Sea [subduction zone]: distance: ~30km    North Bismarck - South Bismarck [continental transform fault]: distance: ~120km    North Bismarck / Solomon Sea [subduction zone]: distance: ~210km Subduction geometry:    Zone: Solomon Islands    Slab depth at epicenter: 15km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (30km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        16km        16km        16km Slab depth at epicenter:        15km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 287°   dip: 39°   rake: 44° Nodal Plane 2: strike: 160°   dip: 64°   rake: 120° Quality: azimuthalGap: -1°   stationPolarityCount: 20   misfitWeightCount: 7.7   misfit: 0.09   stationDistributionRatio: 0.49   meanDistP: 55.1   meanDistT: 31.0   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: 189°   dip: 62°   rake: 146° Nodal Plane 2: strike: 296°   dip: 60°   rake: 32° Quality: azimuthalGap: 89°   stationPolarityCount: 20   misfit: 0.25   stationDistributionRatio: 0.80   rmsAngDiffAccPref: 35.68   fracAcc30degPref: 0.58   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/1791908897768
Event info last updated: 2026.10.13-17:29:02 UTC
Event first association/location: 2026.10.13-16:33:30 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI