Early-est:     Fiji Islands Region    2026.06.23-21:53:19.25    q:B      mb:4.5*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:     fmamp_polarity_waveform:     hash:

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

Earthquake Details: Magnitude: mb: 4.5* [25]    Mwp: - [0]    Mwpd: - [0] Region: Fiji Islands Region Origin Time: 2026.06.23-21:53:19.25 UTC Hypocenter: lat: -16.69°  lon: -176.96°  [+/-26km]    depth: 421km  [+/-21km] Location Quality: qualityCode:  B     stdErr: 1.3s   assocPhases: 55   usedPhases: 40 minDist: 4.9°   maxDist: 151.4°   AzGap: 73°   2ndAzGap: 122°   atten: -1.50 [+/-0.26] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 26km   azMaxHorUnc: 165° 68%ConfEllipsoid:   semiMajorAxisLength: 33km   majorAxisAzimuth: 346°   majorAxisPlunge: 17°   semiIntermediateAxisLength: 21km   intermediateAxisAzimuth: 112°   intermediateAxisPlunge: 62°   semiMinorAxisLength: 17km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.0 [17]    Td: 0.7Xs [1]    Td*T50Ex: - [0]    To: 1.5s [17] Closest plate boundaries:    Niuafo'ou - Australia [continental transform fault]: distance: ~10km    Niuafo'ou - Futuna [continental rift boundary]: distance: ~120km    Futuna - Australia [continental transform fault]: distance: ~130km 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  YES (10km) Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        421km        421km        421km 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)

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 246°   dip: 34°   rake: 149° Nodal Plane 2: strike: 3°   dip: 73°   rake: 60° Quality: azimuthalGap: -1°   stationPolarityCount: 30   misfitWeightCount: 9.3   misfit: 0.16   stationDistributionRatio: 0.57   meanDistP: 49.7   meanDistT: 47.2   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
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
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 260°   dip: 27°   rake: -175° Nodal Plane 2: strike: 165°   dip: 88°   rake: -63° Quality: azimuthalGap: 107°   stationPolarityCount: 30   misfit: 0.20   stationDistributionRatio: 0.64   rmsAngDiffAccPref: 40.63   fracAcc30degPref: 0.42   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1782251602175
Event info last updated: 2026.06.23-22:52:00 UTC
Event first association/location: 2026.06.23-21:58:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA