Early-est:     Taiwan Region    2025.01.27-01:48:52.88    q:B      mb:4.8    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: 4.8 [14]    Mwp: 4.6X [1]    Mwpd: - [0] Region: Taiwan Region Origin Time: 2025.01.27-01:48:52.88 UTC Hypocenter: lat: 21.52°  lon: 120.36°  [+/-14km]    depth: 10km  [+/-14km] Location Quality: qualityCode:  B     stdErr: 1.3s   assocPhases: 44   usedPhases: 18 minDist: 1.5°   maxDist: 167.1°   AzGap: 114°   2ndAzGap: 139°   atten: -1.50 [+/-0.21] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 14km   azMaxHorUnc: 103° 68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 100°   majorAxisPlunge: 11°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 7°   intermediateAxisPlunge: 12°   semiMinorAxisLength: 14km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.3 [6]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.0s [5] Closest plate boundaries:    Yangtze - Sunda [continental convergent boundary]: distance: ~20km    Philippine Sea - Yangtze [continental convergent boundary]: distance: ~20km    Philippine Sea / Sunda [subduction zone]: distance: ~20km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (20km)  YES (20km)  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        10km        10km        10km Slab depth at epicenter:        n/a        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 262°   dip: 21°   rake: 103° Nodal Plane 2: strike: 68°   dip: 70°   rake: 85° Quality: azimuthalGap: -1°   stationPolarityCount: 16   misfitWeightCount: 4.4   misfit: 0.07   stationDistributionRatio: 0.56   meanDistP: 45.0   meanDistT: 30.0   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: 53°   dip: 56°   rake: 105° Nodal Plane 2: strike: 207°   dip: 37°   rake: 69° Quality: azimuthalGap: 116°   stationPolarityCount: 16   misfit: 0.18   stationDistributionRatio: 0.76   rmsAngDiffAccPref: 42.63   fracAcc30degPref: 0.40   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: 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_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/1737942533437
Event info last updated: 2025.01.27-02:49:04 UTC
Event first association/location: 2025.01.27-02:00:30 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI