Early-est:     Fiji Islands Region    2026.02.10-20:44:52.73    q:A      mb:5.4    Mwp:6.1*    Mwpd:-    Td*T50Ex:0.4     fmamp_polarity:./hypo.1770756294105.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1770756294105.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1770756294105.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: 5.4 [106]    Mwp: 6.1* [52]    Mwpd: 6.3Xinv [55]
Region: Fiji Islands Region
Origin Time: 2026.02.10-20:44:52.73 UTC
Hypocenter: lat: -21.17°  lon: -178.16°  [+/-9km]    depth: 514km  [+/-14km]
Location Quality: qualityCode:  A     stdErr: 1.2s   assocPhases: 335   usedPhases: 190
minDist: 4.9°   maxDist: 176.2°   AzGap: 25°   2ndAzGap: 36°   atten: -1.21 [+/-0.18]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 8km   maxHorUnc: 9km   azMaxHorUnc: 141°
68%ConfEllipsoid:   semiMajorAxisLength: 14km   majorAxisAzimuth: 276°   majorAxisPlunge: 87°   semiIntermediateAxisLength: 12km   intermediateAxisAzimuth: 141°   intermediateAxisPlunge: 2°   semiMinorAxisLength: 10km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.3 [96]    Td: 1.5s [25]    Td*T50Ex: 0.4 [25]    To: 2.2s [95]
Closest plate boundaries:
   Tonga - Australia [oceanic spreading ridge]: distance: ~180km
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:
   0.4
   0.4
   0.4
Td*To:
     3.3
     3.3
     3.3
Mwp magnitude:
       6.1*
       6.1*
       6.1*
Hypocenter depth:
       514km
       514km
       514km
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.1770756294105.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):
Nodal Plane 1: strike: 1°   dip: 5°   rake: 61°
Nodal Plane 2: strike: 210°   dip: 85°   rake: 93°
Quality: azimuthalGap: -1°   stationPolarityCount: 111   misfitWeightCount: 30.0   misfit: 0.04   stationDistributionRatio: 0.67   meanDistP: 14.5   meanDistT: 22.6   qualityCode: B
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1770756294105.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 314°   dip: 12°   rake: -5°
Nodal Plane 2: strike: 48°   dip: 89°   rake: -102°
Quality: azimuthalGap: -1°   stationPolarityCount: 20   misfitWeightCount: 7.6   misfit: 0.00   stationDistributionRatio: 0.74   meanDistP: 28.1   meanDistT: 43.6   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity_waveform
./hypo.1770756294105.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 54°   dip: 78°   rake: -118°
Nodal Plane 2: strike: 303°   dip: 31°   rake: -24°
Quality: azimuthalGap: 36°   stationPolarityCount: 111   misfit: 0.10   stationDistributionRatio: 0.65   rmsAngDiffAccPref: 18.72   fracAcc30degPref: 0.98   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1770756294105.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1770756294105
Event info last updated: 2026.02.10-21:43:03 UTC
Event first association/location: 2026.02.10-20:49:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA