Early-est:     Fiji Islands Region    2026.02.10-16:18:13.47    q:B      mb:4.1*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1770740292935.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1770740292935.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1770740292935.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: 4.1* [11]    Mwp: - [0]    Mwpd: - [0]
Region: Fiji Islands Region
Origin Time: 2026.02.10-16:18:13.47 UTC
Hypocenter: lat: -18.74°  lon: -177.91°  [+/-13km]    depth: 565km  [+/-13km]
Location Quality: qualityCode:  B     stdErr: 0.8s   assocPhases: 41   usedPhases: 21
minDist: 4.0°   maxDist: 151.6°   AzGap: 209°   2ndAzGap: 238°   atten: -1.32 [+/-0.28]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 13km   azMaxHorUnc: 39°
68%ConfEllipsoid:   semiMajorAxisLength: 16km   majorAxisAzimuth: 35°   majorAxisPlunge: 7°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 302°   intermediateAxisPlunge: 22°   semiMinorAxisLength: 13km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.0 [5]    Td: -s [0]    Td*T50Ex: - [0]    To: 0.6s [4]
Closest plate boundaries:
   Niuafo'ou - Australia [oceanic spreading ridge]: distance: ~140km
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:
       565km
       565km
       565km
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.1770740292935.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 323°   dip: 18°   rake: 104°
Nodal Plane 2: strike: 128°   dip: 72°   rake: 86°
Quality: azimuthalGap: -1°   stationPolarityCount: 10   misfitWeightCount: 3.9   misfit: 0.00   stationDistributionRatio: 0.59   meanDistP: 48.6   meanDistT: 44.5   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1770740292935.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.1770740292935.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 338°   dip: 62°   rake: -173°
Nodal Plane 2: strike: 245°   dip: 84°   rake: -28°
Quality: azimuthalGap: 109°   stationPolarityCount: 10   misfit: 0.20   stationDistributionRatio: 0.61   rmsAngDiffAccPref: 42.20   fracAcc30degPref: 0.31   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1770740292935.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1770740292935
Event info last updated: 2026.02.10-17:17:00 UTC
Event first association/location: 2026.02.10-16:31:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA