Early-est:     New Britain Region, P.N.G.    2026.10.04-11:09:47.84    q:B      mb:4.6*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:     fmamp_polarity_waveform:     hash:

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details: Magnitude: mb: 4.6* [12]    Mwp: - [0]    Mwpd: - [0] Region: New Britain Region, P.N.G. Origin Time: 2026.10.04-11:09:47.84 UTC Hypocenter: lat: -4.91°  lon: 151.41°  [+/-17km]    depth: 167km  [+/-21km] Location Quality: qualityCode:  B     stdErr: 0.8s   assocPhases: 52   usedPhases: 13 minDist: 1.0°   maxDist: 127.2°   AzGap: 83°   2ndAzGap: 90°   atten: -1.22 [+/-0.43] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 17km   azMaxHorUnc: 146° 68%ConfEllipsoid:   semiMajorAxisLength: 22km   majorAxisAzimuth: 312°   majorAxisPlunge: 41°   semiIntermediateAxisLength: 20km   intermediateAxisAzimuth: 172°   intermediateAxisPlunge: 41°   semiMinorAxisLength: 16km Tsunamigeneic Assesment: Discriminants: Prob Underwater: 47% T50Ex: 0.4 [8]    Td: -s [0]    Td*T50Ex: - [0]    To: 2.5s [8] Closest plate boundaries:    South Bismarck / Solomon Sea [subduction zone]: distance: ~120km    Manus - South Bismarck [oceanic spreading ridge]: distance: ~130km    North Bismarck - South Bismarck [oceanic transform fault]: distance: ~130km    North Bismarck - Manus [oceanic convergent boundary]: distance: ~140km    North Bismarck / Solomon Sea [subduction zone]: distance: ~320km    Solomon Sea \ Woodlark [subduction zone]: distance: ~320km Subduction geometry:    Zone: Solomon Islands: DEBUG: error: [Errno 2] No such file or directory: 'gmt'    Slab depth at epicenter: error: evaluating slab depth: -999.9 Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (120km)  no  no Prob underwater:  47%  47%  47% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        167km        167km        167km Slab depth at epicenter:        n/a        -        - Tsunami and Rupture predictions (TEST!): No prediction: Event too small (Mwp<7.0) or too few Mwp readings (N<20)

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 92°   dip: 31°   rake: 154° Nodal Plane 2: strike: 205°   dip: 77°   rake: 61° Quality: azimuthalGap: -1°   stationPolarityCount: 13   misfitWeightCount: 6.7   misfit: 0.02   stationDistributionRatio: 0.35   meanDistP: 45.7   meanDistT: 47.8   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (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/_polarity_waveform
First-motion Focal Mechanism (HASH): Nodal Plane 1: strike: 96°   dip: 31°   rake: 163° Nodal Plane 2: strike: 201°   dip: 81°   rake: 60° Quality: azimuthalGap: 102°   stationPolarityCount: 13   misfit: 0.23   stationDistributionRatio: 0.74   rmsAngDiffAccPref: 21.28   fracAcc30degPref: 0.98   qualityCode: B Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1791112187813
Event info last updated: 2026.10.04-12:08:01 UTC
Event first association/location: 2026.10.04-11:15:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA