Early-est:     Fiji Islands Region    2025.08.06-16:29:12.42    q:C      mb:4.6*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1754497749251.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754497749251.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754497749251.mech.hash.thumb.jpg

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

Earthquake Details:
Magnitude: mb: 4.6* [23]    Mwp: - [0]    Mwpd: - [0]
Region: Fiji Islands Region
Origin Time: 2025.08.06-16:29:12.42 UTC
Hypocenter: lat: -18.30°  lon: -178.62°  [+/-43km]    depth: 611km  [+/-35km]
Location Quality: qualityCode:  C     stdErr: 1.5s   assocPhases: 54   usedPhases: 31
minDist: 3.2°   maxDist: 89.2°   AzGap: 123°   2ndAzGap: 140°   atten: -1.17 [+/-0.24]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 24km   maxHorUnc: 43km   azMaxHorUnc: 90°
68%ConfEllipsoid:   semiMajorAxisLength: 54km   majorAxisAzimuth: 271°   majorAxisPlunge: 13°   semiIntermediateAxisLength: 36km   intermediateAxisAzimuth: 24°   intermediateAxisPlunge: 60°   semiMinorAxisLength: 28km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.0 [14]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.0s [13]
Closest plate boundaries:
Subduction geometry:    Zone: Kermadec-Tonga: DEBUG: error: [Errno 2] No such file or directory: 'gmt'    Slab depth at epicenter: error: evaluating slab depth: -999.9
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:
       611km
       611km
       611km
Slab depth at epicenter:
       n/a
       -
       -
Tsunami and Rupture predictions (TEST!): No prediction: Event too small (Mwp<7.0) or too few Mwp readings (N<20)
./hypo.1754497749251.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 103°   dip: 31°   rake: 141°
Nodal Plane 2: strike: 227°   dip: 71°   rake: 65°
Quality: azimuthalGap: -1°   stationPolarityCount: 26   misfitWeightCount: 7.6   misfit: 0.14   stationDistributionRatio: 0.47   meanDistP: 51.6   meanDistT: 45.0   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754497749251.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (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_waveform
./hypo.1754497749251.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 303°   dip: 21°   rake: -32°
Nodal Plane 2: strike: 64°   dip: 79°   rake: -108°
Quality: azimuthalGap: 108°   stationPolarityCount: 26   misfit: 0.25   stationDistributionRatio: 0.64   rmsAngDiffAccPref: 34.10   fracAcc30degPref: 0.67   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754497749251.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754497749251
Event info last updated: 2025.08.06-17:28:00 UTC
Event first association/location: 2025.08.06-16:34:03 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA