Early-est:     Near S Coast of New Guinea, Png.    2026.08.11-17:06:26.90    q:B      mb:4.7*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1786467980811.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1786467980811.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1786467980811.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: 4.7* [16]    Mwp: - [0]    Mwpd: - [0]
Region: Near S Coast of New Guinea, Png.
Origin Time: 2026.08.11-17:06:26.90 UTC
Hypocenter: lat: -7.80°  lon: 144.70°  [+/-17km]    depth: 52km  [+/-19km]
Location Quality: qualityCode:  B     stdErr: 1.5s   assocPhases: 34   usedPhases: 18
minDist: 6.3°   maxDist: 81.4°   AzGap: 134°   2ndAzGap: 150°   atten: -1.04 [+/-0.30]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 17km   azMaxHorUnc: 109°
68%ConfEllipsoid:   semiMajorAxisLength: 21km   majorAxisAzimuth: 284°   majorAxisPlunge: 24°   semiIntermediateAxisLength: 19km   intermediateAxisAzimuth: 156°   intermediateAxisPlunge: 54°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.6 [14]    Td: -s [0]    Td*T50Ex: - [0]    To: 19.2s [13]
Closest plate boundaries:
   Woodlark - Australia [continental convergent boundary]: distance: ~80km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 YES (80km)
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       52km
       52km
       52km
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.1786467980811.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 254°   dip: 9°   rake: 71°
Nodal Plane 2: strike: 93°   dip: 82°   rake: 93°
Quality: azimuthalGap: -1°   stationPolarityCount: 14   misfitWeightCount: 9.6   misfit: 0.09   stationDistributionRatio: 0.56   meanDistP: 37.4   meanDistT: 40.7   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1786467980811.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.1786467980811.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 344°   dip: 36°   rake: -179°
Nodal Plane 2: strike: 253°   dip: 90°   rake: -54°
Quality: azimuthalGap: 135°   stationPolarityCount: 14   misfit: 0.22   stationDistributionRatio: 0.67   rmsAngDiffAccPref: 35.27   fracAcc30degPref: 0.51   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1786467980811.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1786467980811
Event info last updated: 2026.08.11-18:05:00 UTC
Event first association/location: 2026.08.11-17:15:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA