Early-est:     Vanuatu Islands    2025.01.26-06:13:38.81    q:A      mb:5.1    Mwp:5.4    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: 5.1 [44]    Mwp: 5.4 [5]    Mwpd: 5.6Xinv [3] Region: Vanuatu Islands Origin Time: 2025.01.26-06:13:38.81 UTC Hypocenter: lat: -17.68°  lon: 167.89°  [+/-14km]    depth: 20km  [+/-14km] Location Quality: qualityCode:  A     stdErr: 1.6s   assocPhases: 88   usedPhases: 72 minDist: 2.3°   maxDist: 153.8°   AzGap: 41°   2ndAzGap: 76°   atten: -0.96 [+/-0.19] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 14km   azMaxHorUnc: 57° 68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 237°   majorAxisPlunge: 4°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 147°   intermediateAxisPlunge: 0°   semiMinorAxisLength: 14km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.5 [29]    Td: 2.5s [6]    Td*T50Ex: 1.1 [6]    To: 1.7s [22] Closest plate boundaries:    New Hebrides / Australia [subduction zone]: distance: ~70km Subduction geometry:    Zone: Santa Cruz Islands/Vanuatu/Loyalty Islands    Slab depth at epicenter: 23km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (70km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    1.1    1.1    1.1 Td*To:      4.2      4.2      4.2 Mwp magnitude:        5.4        5.4        5.4 Hypocenter depth:        20km        20km        20km Slab depth at epicenter:        23km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 157°   dip: 16°   rake: -167° Nodal Plane 2: strike: 54°   dip: 86°   rake: -74° Quality: azimuthalGap: -1°   stationPolarityCount: 63   misfitWeightCount: 13.1   misfit: 0.18   stationDistributionRatio: 0.44   meanDistP: 29.1   meanDistT: 24.8   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: 274°   dip: 9°   rake: -54° Nodal Plane 2: strike: 57°   dip: 83°   rake: -95° Quality: azimuthalGap: 68°   stationPolarityCount: 63   misfit: 0.35   stationDistributionRatio: 0.56   rmsAngDiffAccPref: 36.65   fracAcc30degPref: 0.59   qualityCode: D 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/1737872022300
Event info last updated: 2025.01.26-07:13:48 UTC
Event first association/location: 2025.01.26-06:19:01 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI