Early-est:     Taiwan    2025.02.04-08:19:18.63    q:B      mb:-    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1738657158632.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1738657158632.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1738657158632.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1738657158632.mech.fmamp_amp_mwp.thumb.jpg

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details:
Magnitude: mb: 4.7X [2]    Mwp: - [0]    Mwpd: - [0]
Region: Taiwan
Origin Time: 2025.02.04-08:19:18.63 UTC
Hypocenter: lat: 24.46°  lon: 121.68°  [+/-13km]    depth: 85km  [+/-16km]
Location Quality: qualityCode:  B     stdErr: 1.1s   assocPhases: 9   usedPhases: 7
minDist: 0.5°   maxDist: 69.7°   AzGap: 107°   2ndAzGap: 112°   atten: -9.90 [+/-0.00]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 13km   azMaxHorUnc: 174°
68%ConfEllipsoid:   semiMajorAxisLength: 17km   majorAxisAzimuth: 15°   majorAxisPlunge: 51°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 153°   intermediateAxisPlunge: 31°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: - [0]    Td: -s [0]    Td*T50Ex: - [0]    To: -s [0]
Closest plate boundaries:
   Okinawa - Philippine Sea [continental transform fault]: distance: ~30km
   Philippine Sea - Yangtze [continental transform fault]: distance: ~30km
   Yangtze - Okinawa [continental rift boundary]: distance: ~30km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 no
 YES (30km)
Prob underwater:
 <1%
 <1%
 <1%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       85km
       85km
       85km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1738657158632.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (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/_polarity
./hypo.1738657158632.mech.fmamp_polarity.mechanism.jpg
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: 45°   stationPolarityCount: 5   misfit: 0.99   stationDistributionRatio: 0.68   rmsAngDiffAccPref: 55.39   fracAcc30degPref: 0.00   qualityCode: F
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1738657158632.mech.hash.mechanism.jpg
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
./hypo.1738657158632.mech.fmamp_amp_aref.mechanism.jpg
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
./hypo.1738657158632.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1738657158632
Event info last updated: 2025.02.04-09:19:30 UTC
Event first association/location: 2025.02.04-09:07:11 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI