Early-est:     Near N Coast of New Guinea, Png.    2026.02.13-19:08:18.10    q:A      mb:4.6*    Mwp:-    Mwpd:-    Td*T50Ex:0.5     fmamp_polarity:./hypo.1771009699075.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1771009699075.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1771009699075.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: 4.6* [29]    Mwp: - [0]    Mwpd: - [0]
Region: Near N Coast of New Guinea, Png.
Origin Time: 2026.02.13-19:08:18.10 UTC
Hypocenter: lat: -4.62°  lon: 144.98°  [+/-11km]    depth: 193km  [+/-18km]
Location Quality: qualityCode:  A     stdErr: 0.9s   assocPhases: 61   usedPhases: 37
minDist: 3.5°   maxDist: 84.6°   AzGap: 67°   2ndAzGap: 133°   atten: -1.08 [+/-0.32]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 11km   azMaxHorUnc: 72°
68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 273°   majorAxisPlunge: 74°   semiIntermediateAxisLength: 14km   intermediateAxisAzimuth: 55°   intermediateAxisPlunge: 13°   semiMinorAxisLength: 13km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.4 [19]    Td: 1.1s [4]    Td*T50Ex: 0.5 [4]    To: 1.9s [19]
Closest plate boundaries:
   South Bismarck - Woodlark [continental rift boundary]: distance: ~30km
   North Bismarck - South Bismarck [continental transform fault]: distance: ~120km
   North Bismarck \ Woodlark [subduction zone]: distance: ~190km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (190km)
 no
 no
Prob underwater:
 <1%
 <1%
 <1%
Td*T50Ex:
   0.5
   0.5
   0.5
Td*To:
     2.1
     2.1
     2.1
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       193km
       193km
       193km
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.1771009699075.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 171°   dip: 70°   rake: -1°
Nodal Plane 2: strike: 261°   dip: 89°   rake: -160°
Quality: azimuthalGap: -1°   stationPolarityCount: 28   misfitWeightCount: 9.9   misfit: 0.06   stationDistributionRatio: 0.50   meanDistP: 45.2   meanDistT: 46.6   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1771009699075.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.1771009699075.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 259°   dip: 82°   rake: -162°
Nodal Plane 2: strike: 167°   dip: 72°   rake: -9°
Quality: azimuthalGap: 100°   stationPolarityCount: 28   misfit: 0.29   stationDistributionRatio: 0.73   rmsAngDiffAccPref: 21.97   fracAcc30degPref: 0.96   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1771009699075.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1771009699075
Event info last updated: 2026.02.13-20:07:00 UTC
Event first association/location: 2026.02.13-19:13:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA