Early-est:     Eastern New Guinea Reg., P.N.G.    2026.08.16-10:59:10.56    q:A      mb:5.3    Mwp:5.6*    Mwpd:-    Td*T50Ex:0.9     fmamp_polarity:./hypo.1786877950731.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1786877950731.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1786877950731.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: 5.3 [30]    Mwp: 5.6* [6]    Mwpd: 5.7Xinv [6]
Region: Eastern New Guinea Reg., P.N.G.
Origin Time: 2026.08.16-10:59:10.56 UTC
Hypocenter: lat: -5.58°  lon: 146.81°  [+/-14km]    depth: 130km  [+/-18km]
Location Quality: qualityCode:  A     stdErr: 1.2s   assocPhases: 38   usedPhases: 34
minDist: 3.6°   maxDist: 82.5°   AzGap: 67°   2ndAzGap: 105°   atten: -2.18 [+/-0.34]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 14km   azMaxHorUnc: 28°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 330°   majorAxisPlunge: 63°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 217°   intermediateAxisPlunge: 11°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.6 [20]    Td: 1.4s [11]    Td*T50Ex: 0.9 [11]    To: 4.6s [20]
Closest plate boundaries:
   South Bismarck - Woodlark [continental convergent boundary]: distance: ~110km
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?:
 no
 YES (110km)
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   0.9
   0.9
   0.9
Td*To:
     6.4
     6.4
     6.4
Mwp magnitude:
       5.6*
       5.6*
       5.6*
Hypocenter depth:
       130km
       130km
       130km
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.1786877950731.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 281°   dip: 20°   rake: 92°
Nodal Plane 2: strike: 98°   dip: 70°   rake: 89°
Quality: azimuthalGap: -1°   stationPolarityCount: 31   misfitWeightCount: 11.8   misfit: 0.14   stationDistributionRatio: 0.52   meanDistP: 49.1   meanDistT: 47.5   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1786877950731.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.1786877950731.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 310°   dip: 29°   rake: 59°
Nodal Plane 2: strike: 165°   dip: 65°   rake: 106°
Quality: azimuthalGap: 125°   stationPolarityCount: 31   misfit: 0.28   stationDistributionRatio: 0.74   rmsAngDiffAccPref: 36.81   fracAcc30degPref: 0.56   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1786877950731.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1786877950731
Event info last updated: 2026.08.16-11:58:00 UTC
Event first association/location: 2026.08.16-11:03:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA