Early-est:     Vanuatu Islands    2025.01.27-06:55:06.04    q:A      mb:5.2    Mwp:5.4    Mwpd:-    Td*T50Ex:0.8     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: 5.2 [37]    Mwp: 5.4 [4]    Mwpd: 5.6Xinv [1] Region: Vanuatu Islands Origin Time: 2025.01.27-06:55:06.04 UTC Hypocenter: lat: -17.77°  lon: 167.88°  [+/-15km]    depth: 20km  [+/-14km] Location Quality: qualityCode:  A     stdErr: 1.7s   assocPhases: 79   usedPhases: 53 minDist: 2.4°   maxDist: 154.1°   AzGap: 82°   2ndAzGap: 92°   atten: -1.15 [+/-0.16] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 15km   azMaxHorUnc: 22° 68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 22°   majorAxisPlunge: 1°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 292°   intermediateAxisPlunge: 4°   semiMinorAxisLength: 14km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.3 [25]    Td: 2.4s [10]    Td*T50Ex: 0.8 [10]    To: 1.9s [20] Closest plate boundaries:    New Hebrides / Australia [subduction zone]: distance: ~60km Subduction geometry:    Zone: Santa Cruz Islands/Vanuatu/Loyalty Islands    Slab depth at epicenter: 21km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (60km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    0.8    0.8    0.8 Td*To:      4.6      4.6      4.6 Mwp magnitude:        5.4        5.4        5.4 Hypocenter depth:        20km        20km        20km Slab depth at epicenter:        21km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 33°   dip: 14°   rake: 143° Nodal Plane 2: strike: 159°   dip: 82°   rake: 79° Quality: azimuthalGap: -1°   stationPolarityCount: 54   misfitWeightCount: 13.2   misfit: 0.15   stationDistributionRatio: 0.48   meanDistP: 24.6   meanDistT: 28.9   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: 189°   dip: 15°   rake: -70° Nodal Plane 2: strike: 349°   dip: 76°   rake: -95° Quality: azimuthalGap: 63°   stationPolarityCount: 54   misfit: 0.38   stationDistributionRatio: 0.59   rmsAngDiffAccPref: 36.74   fracAcc30degPref: 0.49   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: 106°   dip: 16°   rake: -173° Nodal Plane 2: strike: 10°   dip: 88°   rake: -74° Quality: azimuthalGap: -1°   stationPolarityCount: 8   misfitWeightCount: 3.0   misfit: 9999.90   stationDistributionRatio: 0.36   meanDistP: 38.1   meanDistT: 32.9   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: 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/1737960904536
Event info last updated: 2025.01.27-07:55:28 UTC
Event first association/location: 2025.01.27-07:00:13 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI