Early-est:     Fiji Islands Region    2026.09.28-12:14:25.46    q:B      mb:4.8*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1790597665938.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1790597665938.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1790597665938.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: 4.8* [41]    Mwp: 5.2X [1]    Mwpd: - [0]
Region: Fiji Islands Region
Origin Time: 2026.09.28-12:14:25.46 UTC
Hypocenter: lat: -20.65°  lon: -178.21°  [+/-32km]    depth: 596km  [+/-32km]
Location Quality: qualityCode:  B     stdErr: 1.2s   assocPhases: 84   usedPhases: 62
minDist: 4.6°   maxDist: 164.6°   AzGap: 83°   2ndAzGap: 90°   atten: -1.52 [+/-0.24]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 16km   maxHorUnc: 32km   azMaxHorUnc: 67°
68%ConfEllipsoid:   semiMajorAxisLength: 42km   majorAxisAzimuth: 69°   majorAxisPlunge: 29°   semiIntermediateAxisLength: 28km   intermediateAxisAzimuth: 227°   intermediateAxisPlunge: 59°   semiMinorAxisLength: 19km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.0 [28]    Td: -s [0]    Td*T50Ex: - [0]    To: 0.9s [28]
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:
       596km
       596km
       596km
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.1790597665938.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 13°   dip: 32°   rake: 103°
Nodal Plane 2: strike: 178°   dip: 59°   rake: 82°
Quality: azimuthalGap: -1°   stationPolarityCount: 39   misfitWeightCount: 12.2   misfit: 0.14   stationDistributionRatio: 0.56   meanDistP: 39.2   meanDistT: 31.8   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1790597665938.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.1790597665938.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 340°   dip: 31°   rake: 82°
Nodal Plane 2: strike: 169°   dip: 60°   rake: 95°
Quality: azimuthalGap: 77°   stationPolarityCount: 39   misfit: 0.23   stationDistributionRatio: 0.72   rmsAngDiffAccPref: 23.73   fracAcc30degPref: 0.79   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1790597665938.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1790597665938
Event info last updated: 2026.09.28-13:13:00 UTC
Event first association/location: 2026.09.28-12:21:03 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA