Early-est:     New Britain Region, P.N.G.    2025.02.04-09:36:46.13    q:B      mb:4.9    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: 4.9 [30]    Mwp: 5.0X [1]    Mwpd: - [0] Region: New Britain Region, P.N.G. Origin Time: 2025.02.04-09:36:46.13 UTC Hypocenter: lat: -5.62°  lon: 152.05°  [+/-13km]    depth: 51km  [+/-18km] Location Quality: qualityCode:  B     stdErr: 1.0s   assocPhases: 68   usedPhases: 39 minDist: 1.4°   maxDist: 149.7°   AzGap: 59°   2ndAzGap: 74°   atten: -0.96 [+/-0.18] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 13km   azMaxHorUnc: 107° 68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 312°   majorAxisPlunge: 65°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 96°   intermediateAxisPlunge: 21°   semiMinorAxisLength: 14km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.5 [17]    Td: 1.2Xs [2]    Td*T50Ex: - [0]    To: 11.0s [12] Closest plate boundaries:    South Bismarck / Solomon Sea [subduction zone]: distance: ~30km    North Bismarck - South Bismarck [continental transform fault]: distance: ~140km    North Bismarck / Solomon Sea [subduction zone]: distance: ~220km Subduction geometry:    Zone: Solomon Islands    Slab depth at epicenter: 12km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (30km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        51km        51km        51km Slab depth at epicenter:        12km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 109°   dip: 32°   rake: -166° Nodal Plane 2: strike: 6°   dip: 82°   rake: -59° Quality: azimuthalGap: -1°   stationPolarityCount: 37   misfitWeightCount: 10.4   misfit: 0.16   stationDistributionRatio: 0.36   meanDistP: 41.4   meanDistT: 34.3   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 212°   dip: 37°   rake: -66° Nodal Plane 2: strike: 3°   dip: 56°   rake: -107° Quality: azimuthalGap: 58°   stationPolarityCount: 37   misfit: 0.20   stationDistributionRatio: 0.68   rmsAngDiffAccPref: 37.53   fracAcc30degPref: 0.54   qualityCode: C 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: nan° Nodal Plane 2: strike: nan°   dip: nan°   rake: nan° 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: nan° Nodal Plane 2: strike: nan°   dip: nan°   rake: nan° 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/1738661805170
Event info last updated: 2025.02.04-10:37:03 UTC
Event first association/location: 2025.02.04-09:49:12 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI