Early-est:     Taiwan    2025.12.11-14:49:04.73    q:B      mb:-    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: 4.7X [3]    Mwp: - [0]    Mwpd: - [0] Region: Taiwan Origin Time: 2025.12.11-14:49:04.73 UTC Hypocenter: lat: 23.14°  lon: 120.59°  [+/-16km]    depth: 10km  [+/-25km] Location Quality: qualityCode:  B     stdErr: 1.0s   assocPhases: 10   usedPhases: 8 minDist: 0.6°   maxDist: 161.9°   AzGap: 137°   2ndAzGap: 194°   atten: -9.90 [+/-0.00] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 16km   azMaxHorUnc: 157° 68%ConfEllipsoid:   semiMajorAxisLength: 28km   majorAxisAzimuth: 143°   majorAxisPlunge: 62°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 35°   intermediateAxisPlunge: 9°   semiMinorAxisLength: 16km Tsunamigeneic Assesment: Discriminants: Prob Underwater: <1% T50Ex: 0.6X [1]    Td: -s [0]    Td*T50Ex: - [0]    To: -s [0] Closest plate boundaries:    Philippine Sea - Yangtze [continental convergent boundary]: distance: ~20km    Yangtze - Sunda [continental transform fault]: distance: ~140km    Philippine Sea / Sunda [subduction zone]: distance: ~170km    Okinawa - Philippine Sea [continental transform fault]: distance: ~170km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (170km)  YES (20km)  no Prob underwater:  <1%  <1%  <1% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        10km        10km        10km Slab depth at epicenter:        n/a        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 32°   dip: 22°   rake: 27° Nodal Plane 2: strike: 276°   dip: 80°   rake: 110° Quality: azimuthalGap: -1°   stationPolarityCount: 8   misfitWeightCount: 4.4   misfit: 0.07   stationDistributionRatio: 0.54   meanDistP: 28.8   meanDistT: 40.4   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: 194°   stationPolarityCount: 8   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   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: 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/1765464544726
Event info last updated: 2025.12.11-15:49:04 UTC
Event first association/location: 2025.12.11-15:45:31 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI