Early-est:     Taiwan    2025.01.25-23:38:55.88    q:A      mb:5.2    Mwp:5.5    Mwpd:-    Td*T50Ex:1.0     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 [135]    Mwp: 5.5 [5]    Mwpd: 5.5Xinv [4] Region: Taiwan Origin Time: 2025.01.25-23:38:55.88 UTC Hypocenter: lat: 23.04°  lon: 120.61°  [+/-13km]    depth: 18km  [+/-14km] Location Quality: qualityCode:  A     stdErr: 1.6s   assocPhases: 193   usedPhases: 161 minDist: 0.5°   maxDist: 168.6°   AzGap: 43°   2ndAzGap: 64°   atten: -0.83 [+/-0.12] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 13km   azMaxHorUnc: 143° 68%ConfEllipsoid:   semiMajorAxisLength: 17km   majorAxisAzimuth: 332°   majorAxisPlunge: 26°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 63°   intermediateAxisPlunge: 4°   semiMinorAxisLength: 13km Tsunamigeneic Assesment: Discriminants: Prob Underwater: <1% T50Ex: 0.5 [102]    Td: 2.1s [10]    Td*T50Ex: 1.0 [10]    To: 2.7s [89] Closest plate boundaries:    Philippine Sea - Yangtze [continental convergent boundary]: distance: ~30km    Yangtze - Sunda [continental transform fault]: distance: ~130km    Philippine Sea / Sunda [subduction zone]: distance: ~160km    Okinawa - Philippine Sea [continental transform fault]: distance: ~180km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (160km)  YES (30km)  no Prob underwater:  <1%  <1%  <1% Td*T50Ex:    1.0    1.0    1.0 Td*To:      5.7      5.7      5.7 Mwp magnitude:        5.5        5.5        5.5 Hypocenter depth:        18km        18km        18km Slab depth at epicenter:        n/a        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 42°   dip: 73°   rake: -173° Nodal Plane 2: strike: 310°   dip: 83°   rake: -17° Quality: azimuthalGap: -1°   stationPolarityCount: 126   misfitWeightCount: 18.9   misfit: 0.17   stationDistributionRatio: 0.38   meanDistP: 19.7   meanDistT: 45.2   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: 186°   dip: 61°   rake: 106° Nodal Plane 2: strike: 336°   dip: 33°   rake: 64° Quality: azimuthalGap: 63°   stationPolarityCount: 127   misfit: 0.35   stationDistributionRatio: 0.67   rmsAngDiffAccPref: 36.81   fracAcc30degPref: 0.54   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: 152°   dip: 72°   rake: -13° Nodal Plane 2: strike: 246°   dip: 77°   rake: -162° Quality: azimuthalGap: -1°   stationPolarityCount: 18   misfitWeightCount: 4.1   misfit: 9999.90   stationDistributionRatio: 0.27   meanDistP: 27.3   meanDistT: 48.0   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/1737848335705
Event info last updated: 2025.01.26-00:39:05 UTC
Event first association/location: 2025.01.25-23:44:01 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI