Early-est:     Fiji Islands Region    2026.10.01-02:40:38.61    q:C      mb:4.5*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1790822441661.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1790822441661.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1790822441661.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: 4.5* [13]    Mwp: - [0]    Mwpd: - [0]
Region: Fiji Islands Region
Origin Time: 2026.10.01-02:40:38.61 UTC
Hypocenter: lat: -20.83°  lon: -179.01°  [+/-40km]    depth: 598km  [+/-41km]
Location Quality: qualityCode:  C     stdErr: 1.2s   assocPhases: 39   usedPhases: 19
minDist: 12.1°   maxDist: 148.2°   AzGap: 139°   2ndAzGap: 208°   atten: -1.68 [+/-0.50]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 37km   maxHorUnc: 40km   azMaxHorUnc: 52°
68%ConfEllipsoid:   semiMajorAxisLength: 50km   majorAxisAzimuth: 243°   majorAxisPlunge: 10°   semiIntermediateAxisLength: 48km   intermediateAxisAzimuth: 338°   intermediateAxisPlunge: 25°   semiMinorAxisLength: 39km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [6]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.3s [6]
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:
       598km
       598km
       598km
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.1790822441661.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 11°   dip: 14°   rake: 180°
Nodal Plane 2: strike: 101°   dip: 90°   rake: 76°
Quality: azimuthalGap: -1°   stationPolarityCount: 16   misfitWeightCount: 4.9   misfit: 0.15   stationDistributionRatio: 0.49   meanDistP: 52.8   meanDistT: 44.3   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1790822441661.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.1790822441661.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 20°   dip: 30°   rake: 170°
Nodal Plane 2: strike: 119°   dip: 85°   rake: 61°
Quality: azimuthalGap: 145°   stationPolarityCount: 16   misfit: 0.33   stationDistributionRatio: 0.51   rmsAngDiffAccPref: 44.90   fracAcc30degPref: 0.40   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1790822441661.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1790822441661
Event info last updated: 2026.10.01-03:39:00 UTC
Event first association/location: 2026.10.01-02:49:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA