Early-est:     Fiji Islands Region    2025.01.28-11:01:40.93    q:B      mb:4.2    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1738062100926.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1738062100926.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1738062100926.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1738062100926.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: 4.2 [12]    Mwp: - [0]    Mwpd: - [0]
Region: Fiji Islands Region
Origin Time: 2025.01.28-11:01:40.93 UTC
Hypocenter: lat: -17.87°  lon: -178.62°  [+/-14km]    depth: 548km  [+/-18km]
Location Quality: qualityCode:  B     stdErr: 0.5s   assocPhases: 39   usedPhases: 17
minDist: 3.2°   maxDist: 144.4°   AzGap: 134°   2ndAzGap: 171°   atten: -1.41 [+/-0.23]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 14km   azMaxHorUnc: 142°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 70°   majorAxisPlunge: 48°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 336°   intermediateAxisPlunge: 4°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.0X [3]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.0Xs [3]
Closest plate boundaries:
Subduction geometry:    Zone: Kermadec-Tonga    Slab depth at epicenter: 562km
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       548km
       548km
       548km
Slab depth at epicenter:
       562km
       -
       -
./hypo.1738062100926.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 331°   dip: 10°   rake: 173°
Nodal Plane 2: strike: 68°   dip: 89°   rake: 80°
Quality: azimuthalGap: -1°   stationPolarityCount: 16   misfitWeightCount: 5.9   misfit: 0.04   stationDistributionRatio: 0.43   meanDistP: 49.3   meanDistT: 32.7   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1738062100926.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 30°   dip: 74°   rake: 80°
Nodal Plane 2: strike: 243°   dip: 19°   rake: 122°
Quality: azimuthalGap: 102°   stationPolarityCount: 16   misfit: 0.22   stationDistributionRatio: 0.57   rmsAngDiffAccPref: 45.78   fracAcc30degPref: 0.34   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1738062100926.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.1738062100926.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.1738062100926.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1738062100926
Event info last updated: 2025.01.28-12:01:46 UTC
Event first association/location: 2025.01.28-11:12:20 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI