Early-est:     South of Fiji Islands    2026.08.17-08:38:57.99    q:B      mb:4.7*    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: 4.7* [20]    Mwp: - [0]    Mwpd: - [0] Region: South of Fiji Islands Origin Time: 2026.08.17-08:38:57.99 UTC Hypocenter: lat: -23.94°  lon: -179.34°  [+/-13km]    depth: 518km  [+/-18km] Location Quality: qualityCode:  B     stdErr: 1.2s   assocPhases: 22   usedPhases: 21 minDist: 6.7°   maxDist: 51.4°   AzGap: 129°   2ndAzGap: 213°   atten: -2.02 [+/-0.32] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 13km   azMaxHorUnc: 18° 68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 37°   majorAxisPlunge: 69°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 190°   intermediateAxisPlunge: 19°   semiMinorAxisLength: 16km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.0 [14]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.6s [14] Closest plate boundaries:    Kermadec - Australia [continental rift boundary]: distance: ~190km    Kermadec - Tonga [continental rift boundary]: distance: ~200km    Tonga - Australia [continental rift boundary]: distance: ~200km    Kermadec / Pacific [subduction zone]: distance: ~420km    Tonga / Pacific [subduction zone]: distance: ~440km 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?:  YES (420km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        518km        518km        518km 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: 36°   dip: 48°   rake: -160° Nodal Plane 2: strike: 292°   dip: 75°   rake: -43° Quality: azimuthalGap: -1°   stationPolarityCount: 17   misfitWeightCount: 5.8   misfit: 0.14   stationDistributionRatio: 0.44   meanDistP: 52.7   meanDistT: 53.2   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):    (No solution available) Nodal Plane 1: strike: 999°   dip: 99°   rake: 999° Nodal Plane 2: strike: 324°   dip: 13°   rake: 135° Quality: azimuthalGap: 239°   stationPolarityCount: 17   misfit: 0.99   stationDistributionRatio: 0.62   rmsAngDiffAccPref: 38.68   fracAcc30degPref: 0.00   qualityCode: E Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1786955936971
Event info last updated: 2026.08.17-09:37:00 UTC
Event first association/location: 2026.08.17-08:43:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA