Early-est:     New Britain Region, P.N.G.    2026.09.26-21:49:28.97    q:B      mb:5.0*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1790459367776.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1790459367776.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1790459367776.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: 5.0* [28]    Mwp: - [0]    Mwpd: - [0]
Region: New Britain Region, P.N.G.
Origin Time: 2026.09.26-21:49:28.97 UTC
Hypocenter: lat: -4.65°  lon: 152.82°  [+/-14km]    depth: 65km  [+/-17km]
Location Quality: qualityCode:  B     stdErr: 1.4s   assocPhases: 63   usedPhases: 38
minDist: 0.8°   maxDist: 145.1°   AzGap: 93°   2ndAzGap: 142°   atten: -1.67 [+/-0.25]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 14km   azMaxHorUnc: 48°
68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 232°   majorAxisPlunge: 33°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 349°   intermediateAxisPlunge: 34°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: 25%
T50Ex: 0.4 [21]    Td: 0.8Xs [3]    Td*T50Ex: - [0]    To: 3.1s [19]
Closest plate boundaries:
   North Bismarck - South Bismarck [continental transform fault]: distance: ~10km
   South Bismarck / Solomon Sea [subduction zone]: distance: ~110km
   Pacific - North Bismarck [oceanic transform fault]: distance: ~190km
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 (110km)
 no
 YES (10km)
Prob underwater:
 25%
 25%
 25%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       65km
       65km
       65km
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.1790459367776.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 44°   dip: 11°   rake: -50°
Nodal Plane 2: strike: 184°   dip: 81°   rake: -97°
Quality: azimuthalGap: -1°   stationPolarityCount: 31   misfitWeightCount: 11.0   misfit: 0.18   stationDistributionRatio: 0.40   meanDistP: 33.4   meanDistT: 41.5   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1790459367776.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.1790459367776.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 215°   dip: 36°   rake: 145°
Nodal Plane 2: strike: 335°   dip: 70°   rake: 59°
Quality: azimuthalGap: 148°   stationPolarityCount: 31   misfit: 0.28   stationDistributionRatio: 0.77   rmsAngDiffAccPref: 36.54   fracAcc30degPref: 0.58   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1790459367776.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1790459367776
Event info last updated: 2026.09.26-22:48:00 UTC
Event first association/location: 2026.09.26-21:54:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA