Early-est:     New Britain Region, P.N.G.    2026.10.13-18:45:03.78    q:A      mb:5.3    Mwp:6.1    Mwpd:-    Td*T50Ex:2.2     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: 5.3 [85]    Mwp: 6.1 [44]    Mwpd: 6.2Xinv [33] Region: New Britain Region, P.N.G. Origin Time: 2026.10.13-18:45:03.78 UTC Hypocenter: lat: -5.44°  lon: 152.11°  [+/-8km]    depth: 17km  [+/-17km] Location Quality: qualityCode:  A     stdErr: 1.1s   assocPhases: 162   usedPhases: 126 minDist: 1.3°   maxDist: 157.1°   AzGap: 35°   2ndAzGap: 41°   atten: -0.96 [+/-0.15] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 6km   maxHorUnc: 8km   azMaxHorUnc: 90° 68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 89°   majorAxisPlunge: 73°   semiIntermediateAxisLength: 9km   intermediateAxisAzimuth: 271°   intermediateAxisPlunge: 17°   semiMinorAxisLength: 7km Tsunamigeneic Assesment: Discriminants: Prob Underwater: 86% T50Ex: 0.6 [65]    Td: 3.7s [17]    Td*T50Ex: 2.2 [17]    To: 10.5s [52] Closest plate boundaries:    South Bismarck / Solomon Sea [subduction zone]: distance: ~40km    North Bismarck - South Bismarck [continental transform fault]: distance: ~130km Subduction geometry:    Zone: Solomon Islands    Slab depth at epicenter: 18km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (40km)  no  no Prob underwater:  86%  86%  86% Td*T50Ex:    2.2    2.2    2.2 Td*To:      38.9      38.9      38.9 Mwp magnitude:        6.1        6.1        6.1 Hypocenter depth:        17km        17km        17km Slab depth at epicenter:        18km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY): Nodal Plane 1: strike: 149°   dip: 10°   rake: -1° Nodal Plane 2: strike: 240°   dip: 90°   rake: -100° Quality: azimuthalGap: -1°   stationPolarityCount: 121   misfitWeightCount: 24.5   misfit: 0.18   stationDistributionRatio: 0.51   meanDistP: 16.6   meanDistT: 13.4   qualityCode: B 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: 265°   dip: 13°   rake: 101° Nodal Plane 2: strike: 73°   dip: 77°   rake: 87° Quality: azimuthalGap: 34°   stationPolarityCount: 121   misfit: 0.25   stationDistributionRatio: 0.62   rmsAngDiffAccPref: 30.90   fracAcc30degPref: 0.63   qualityCode: C Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 198°   dip: 40°   rake: 34° Nodal Plane 2: strike: 81°   dip: 69°   rake: 125° Quality: azimuthalGap: -1°   stationPolarityCount: 43   misfitWeightCount: 11.6   misfit: 9999.90   stationDistributionRatio: 0.71   meanDistP: 34.8   meanDistT: 28.5   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_aref
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 160°   dip: 20°   rake: 8° Nodal Plane 2: strike: 63°   dip: 87°   rake: 110° Quality: azimuthalGap: -1°   stationPolarityCount: 41   misfitWeightCount: 10.6   misfit: 9999.90   stationDistributionRatio: 0.55   meanDistP: 33.0   meanDistT: 29.5   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_mwp

Event ID: smi:KOERI/ee/event/1791917105115
Event info last updated: 2026.10.13-19:46:04 UTC
Event first association/location: 2026.10.13-18:49:12 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI