Early-est:     New Britain Region, P.N.G.    2026.10.03-11:05:48.65    q:B      mb:4.2*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1791025548647.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1791025548647.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1791025548647.mech.hash.thumb.jpg

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

Earthquake Details:
Magnitude: mb: 4.2* [9]    Mwp: - [0]    Mwpd: - [0]
Region: New Britain Region, P.N.G.
Origin Time: 2026.10.03-11:05:48.65 UTC
Hypocenter: lat: -5.77°  lon: 148.35°  [+/-24km]    depth: 240km  [+/-18km]
Location Quality: qualityCode:  B     stdErr: 1.1s   assocPhases: 12   usedPhases: 11
minDist: 3.8°   maxDist: 31.4°   AzGap: 249°   2ndAzGap: 302°   atten: -1.97 [+/-0.77]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 24km   azMaxHorUnc: 6°
68%ConfEllipsoid:   semiMajorAxisLength: 30km   majorAxisAzimuth: 186°   majorAxisPlunge: 6°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 92°   intermediateAxisPlunge: 36°   semiMinorAxisLength: 17km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: 94%
T50Ex: 0.3 [7]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.2s [7]
Closest plate boundaries:
   South Bismarck - Woodlark [oceanic convergent boundary]: distance: ~180km
   South Bismarck / Solomon Sea [subduction zone]: distance: ~180km
   Solomon Sea \ Woodlark [subduction zone]: distance: ~180km
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 (180km)
 no
 no
Prob underwater:
 94%
 94%
 94%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       240km
       240km
       240km
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)
./hypo.1791025548647.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 148°   dip: 13°   rake: 163°
Nodal Plane 2: strike: 254°   dip: 86°   rake: 77°
Quality: azimuthalGap: -1°   stationPolarityCount: 9   misfitWeightCount: 4.4   misfit: 0.00   stationDistributionRatio: 0.42   meanDistP: 44.5   meanDistT: 46.9   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1791025548647.mech.fmamp_polarity.mechanism.jpg
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
./hypo.1791025548647.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 189°   dip: 32°   rake: -159°
Nodal Plane 2: strike: 81°   dip: 79°   rake: -60°
Quality: azimuthalGap: 131°   stationPolarityCount: 9   misfit: 0.25   stationDistributionRatio: 0.74   rmsAngDiffAccPref: 37.86   fracAcc30degPref: 0.43   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1791025548647.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1791025548647
Event info last updated: 2026.10.03-12:04:01 UTC
Event first association/location: 2026.10.03-11:12:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA