Early-est:     Near N Coast of New Guinea, Png.    2026.03.29-16:14:40.76    q:B      mb:4.1*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1774800880889.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1774800880889.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1774800880889.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: 4.1* [9]    Mwp: - [0]    Mwpd: - [0]
Region: Near N Coast of New Guinea, Png.
Origin Time: 2026.03.29-16:14:40.76 UTC
Hypocenter: lat: -4.34°  lon: 144.64°  [+/-11km]    depth: 93km  [+/-17km]
Location Quality: qualityCode:  B     stdErr: 1.4s   assocPhases: 12   usedPhases: 10
minDist: 3.6°   maxDist: 49.9°   AzGap: 131°   2ndAzGap: 240°   atten: -1.23 [+/-0.87]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 10km   maxHorUnc: 11km   azMaxHorUnc: 136°
68%ConfEllipsoid:   semiMajorAxisLength: 17km   majorAxisAzimuth: 109°   majorAxisPlunge: 83°   semiIntermediateAxisLength: 14km   intermediateAxisAzimuth: 317°   intermediateAxisPlunge: 6°   semiMinorAxisLength: 12km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.4 [6]    Td: -s [0]    Td*T50Ex: - [0]    To: 6.6s [6]
Closest plate boundaries:
   South Bismarck - Woodlark [continental rift boundary]: distance: ~10km
   North Bismarck - South Bismarck [continental transform fault]: distance: ~90km
   North Bismarck \ Woodlark [subduction zone]: distance: ~140km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (140km)
 no
 no
Prob underwater:
 <1%
 <1%
 <1%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       93km
       93km
       93km
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.1774800880889.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 85°   dip: 30°   rake: 139°
Nodal Plane 2: strike: 211°   dip: 71°   rake: 67°
Quality: azimuthalGap: -1°   stationPolarityCount: 10   misfitWeightCount: 5.7   misfit: 0.00   stationDistributionRatio: 0.40   meanDistP: 41.1   meanDistT: 42.6   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1774800880889.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.1774800880889.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: 240°   stationPolarityCount: 10   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1774800880889.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1774800880889
Event info last updated: 2026.03.29-17:13:00 UTC
Event first association/location: 2026.03.29-16:22:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA