Early-est:     Eastern New Guinea Reg., P.N.G.    2026.08.16-08:06:53.23    q:B      mb:4.9*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1786867612624.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1786867612624.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1786867612624.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: 4.9* [18]    Mwp: - [0]    Mwpd: - [0]
Region: Eastern New Guinea Reg., P.N.G.
Origin Time: 2026.08.16-08:06:53.23 UTC
Hypocenter: lat: -5.80°  lon: 146.33°  [+/-22km]    depth: 134km  [+/-23km]
Location Quality: qualityCode:  B     stdErr: 1.1s   assocPhases: 27   usedPhases: 24
minDist: 6.0°   maxDist: 142.4°   AzGap: 113°   2ndAzGap: 176°   atten: -1.40 [+/-0.30]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 22km   azMaxHorUnc: 0°
68%ConfEllipsoid:   semiMajorAxisLength: 28km   majorAxisAzimuth: 358°   majorAxisPlunge: 16°   semiIntermediateAxisLength: 23km   intermediateAxisAzimuth: 220°   intermediateAxisPlunge: 69°   semiMinorAxisLength: 17km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.0 [13]    Td: 0.6Xs [1]    Td*T50Ex: - [0]    To: 3.2s [13]
Closest plate boundaries:
   South Bismarck - Woodlark [continental convergent boundary]: distance: ~50km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 YES (50km)
 no
Prob underwater:
 <1%
 <1%
 <1%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       134km
       134km
       134km
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.1786867612624.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 6°   dip: 18°   rake: -5°
Nodal Plane 2: strike: 100°   dip: 88°   rake: -108°
Quality: azimuthalGap: -1°   stationPolarityCount: 20   misfitWeightCount: 6.0   misfit: 0.08   stationDistributionRatio: 0.47   meanDistP: 42.3   meanDistT: 42.6   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1786867612624.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.1786867612624.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (No solution available)
Nodal Plane 1: strike: 999°   dip: 99°   rake: 999°
Nodal Plane 2: strike: 324°   dip: 13°   rake: 135°
Quality: azimuthalGap: 215°   stationPolarityCount: 20   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1786867612624.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1786867612624
Event info last updated: 2026.08.16-09:05:01 UTC
Event first association/location: 2026.08.16-08:14:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA