Early-est:     Southeast of Loyalty Islands    2025.02.03-13:02:22.81    q:A      mb:5.3    Mwp:5.7    Mwpd:-    Td*T50Ex:1.1     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: 5.3 [76]    Mwp: 5.7 [9]    Mwpd: 5.8Xinv [4] Region: Southeast of Loyalty Islands Origin Time: 2025.02.03-13:02:22.81 UTC Hypocenter: lat: -22.77°  lon: 171.28°  [+/-14km]    depth: 20km  [+/-14km] Location Quality: qualityCode:  A     stdErr: 1.8s   assocPhases: 194   usedPhases: 139 minDist: 4.5°   maxDist: 163.5°   AzGap: 44°   2ndAzGap: 73°   atten: -1.15 [+/-0.13] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 14km   azMaxHorUnc: 146° 68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 325°   majorAxisPlunge: 0°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 235°   intermediateAxisPlunge: 5°   semiMinorAxisLength: 13km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [50]    Td: 2.5s [14]    Td*T50Ex: 1.1 [14]    To: 6.5s [38] Closest plate boundaries:    New Hebrides / Australia [subduction zone]: distance: ~30km    New Hebrides - Australia [oceanic transform fault]: distance: ~130km Subduction geometry: none or not available 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:    1.1    1.1    1.1 Td*To:      16.2      16.2      16.2 Mwp magnitude:        5.7        5.7        5.7 Hypocenter depth:        20km        20km        20km Slab depth at epicenter:        n/a        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 59°   dip: 15°   rake: -94° Nodal Plane 2: strike: 243°   dip: 75°   rake: -89° Quality: azimuthalGap: -1°   stationPolarityCount: 123   misfitWeightCount: 19.7   misfit: 0.26   stationDistributionRatio: 0.37   meanDistP: 26.1   meanDistT: 23.5   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 0°   dip: 36°   rake: 164° Nodal Plane 2: strike: 103°   dip: 81°   rake: 55° Quality: azimuthalGap: 44°   stationPolarityCount: 123   misfit: 0.37   stationDistributionRatio: 0.51   rmsAngDiffAccPref: 35.74   fracAcc30degPref: 0.53   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 227°   dip: 52°   rake: 25° Nodal Plane 2: strike: 121°   dip: 70°   rake: 139° Quality: azimuthalGap: -1°   stationPolarityCount: 20   misfitWeightCount: 4.4   misfit: 9999.90   stationDistributionRatio: 0.67   meanDistP: 50.9   meanDistT: 26.1   qualityCode: D 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/1738587742748
Event info last updated: 2025.02.03-14:03:08 UTC
Event first association/location: 2025.02.03-13:07:10 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI