Early-est:     New Ireland Region, P.N.G.    2025.01.29-20:03:58.52    q:B      mb:4.6    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:     hash:     fmamp_amp_aref:     fmamp_amp_mwp:

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details: Magnitude: mb: 4.6 [18]    Mwp: - [0]    Mwpd: - [0] Region: New Ireland Region, P.N.G. Origin Time: 2025.01.29-20:03:58.52 UTC Hypocenter: lat: -5.32°  lon: 153.63°  [+/-16km]    depth: 74km  [+/-22km] Location Quality: qualityCode:  B     stdErr: 0.7s   assocPhases: 50   usedPhases: 19 minDist: 1.8°   maxDist: 71.9°   AzGap: 198°   2ndAzGap: 231°   atten: -0.98 [+/-0.33] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 15km   maxHorUnc: 16km   azMaxHorUnc: 86° 68%ConfEllipsoid:   semiMajorAxisLength: 23km   majorAxisAzimuth: 137°   majorAxisPlunge: 63°   semiIntermediateAxisLength: 19km   intermediateAxisAzimuth: 247°   intermediateAxisPlunge: 10°   semiMinorAxisLength: 17km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.6 [7]    Td: -s [0]    Td*T50Ex: - [0]    To: 5.3s [6] Closest plate boundaries:    North Bismarck - South Bismarck [oceanic transform fault]: distance: ~30km    South Bismarck / Solomon Sea [subduction zone]: distance: ~70km    North Bismarck / Solomon Sea [subduction zone]: distance: ~110km    Pacific - North Bismarck [continental transform fault]: distance: ~110km    Pacific / Solomon Sea [subduction zone]: distance: ~260km Subduction geometry:    Zone: Solomon Islands    Slab depth at epicenter: 33km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (70km)  no  YES (30km) Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        74km        74km        74km Slab depth at epicenter:        33km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 171°   dip: 14°   rake: -4° Nodal Plane 2: strike: 265°   dip: 89°   rake: -104° Quality: azimuthalGap: -1°   stationPolarityCount: 18   misfitWeightCount: 6.8   misfit: 0.12   stationDistributionRatio: 0.45   meanDistP: 33.5   meanDistT: 30.9   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
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: 174°   stationPolarityCount: 18   misfit: 0.99   stationDistributionRatio: 0.53   rmsAngDiffAccPref: 40.78   fracAcc30degPref: 0.00   qualityCode: E Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (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/_amp_aref
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (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/_amp_mwp

Event ID: smi:KOERI/ee/event/1738181037882
Event info last updated: 2025.01.29-21:04:02 UTC
Event first association/location: 2025.01.29-20:11:12 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI