Early-est:     Fiji Islands Region    2025.01.27-19:26:07.59    q:A      mb:5.1    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1738005967595.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1738005967595.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1738005967595.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1738005967595.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: 5.1 [30]    Mwp: - [0]    Mwpd: - [0]
Region: Fiji Islands Region
Origin Time: 2025.01.27-19:26:07.59 UTC
Hypocenter: lat: -18.44°  lon: -177.87°  [+/-15km]    depth: 555km  [+/-17km]
Location Quality: qualityCode:  A     stdErr: 1.3s   assocPhases: 71   usedPhases: 42
minDist: 3.9°   maxDist: 152.1°   AzGap: 89°   2ndAzGap: 122°   atten: -1.36 [+/-0.23]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 15km   azMaxHorUnc: 165°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 341°   majorAxisPlunge: 34°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 230°   intermediateAxisPlunge: 28°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.0 [22]    Td: 1.2Xs [3]    Td*T50Ex: - [0]    To: 0.9s [17]
Closest plate boundaries:
   Niuafo'ou - Australia [oceanic spreading ridge]: distance: ~140km
Subduction geometry:    Zone: Kermadec-Tonga    Slab depth at epicenter: 498km
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:
       555km
       555km
       555km
Slab depth at epicenter:
       498km
       -
       -
./hypo.1738005967595.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 56°   dip: 28°   rake: 171°
Nodal Plane 2: strike: 154°   dip: 86°   rake: 62°
Quality: azimuthalGap: -1°   stationPolarityCount: 41   misfitWeightCount: 12.8   misfit: 0.09   stationDistributionRatio: 0.66   meanDistP: 21.1   meanDistT: 32.7   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1738005967595.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 18°   dip: 73°   rake: -127°
Nodal Plane 2: strike: 268°   dip: 40°   rake: -26°
Quality: azimuthalGap: 89°   stationPolarityCount: 41   misfit: 0.14   stationDistributionRatio: 0.58   rmsAngDiffAccPref: 34.56   fracAcc30degPref: 0.60   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1738005967595.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.1738005967595.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.1738005967595.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1738005967595
Event info last updated: 2025.01.27-20:26:46 UTC
Event first association/location: 2025.01.27-19:31:02 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI