Early-est:     Fiji Islands Region    2026.03.31-09:32:54.68    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* [13]    Mwp: - [0]    Mwpd: - [0] Region: Fiji Islands Region Origin Time: 2026.03.31-09:32:54.68 UTC Hypocenter: lat: -20.26°  lon: -177.65°  [+/-14km]    depth: 534km  [+/-15km] Location Quality: qualityCode:  B     stdErr: 1.0s   assocPhases: 43   usedPhases: 21 minDist: 4.8°   maxDist: 150.1°   AzGap: 163°   2ndAzGap: 233°   atten: -0.95 [+/-0.37] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 14km   azMaxHorUnc: 147° 68%ConfEllipsoid:   semiMajorAxisLength: 17km   majorAxisAzimuth: 144°   majorAxisPlunge: 27°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 20°   intermediateAxisPlunge: 47°   semiMinorAxisLength: 14km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.1 [7]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.1s [7] Closest plate boundaries:    Tonga - Australia [oceanic transform fault]: distance: ~150km    Niuafo'ou - Australia [oceanic transform fault]: distance: ~160km    Tonga - Niuafo'ou [continental convergent boundary]: distance: ~200km    Tonga / Pacific [subduction zone]: distance: ~420km 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:        534km        534km        534km 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: 225°   dip: 23°   rake: -48° Nodal Plane 2: strike: 0°   dip: 74°   rake: -106° Quality: azimuthalGap: -1°   stationPolarityCount: 17   misfitWeightCount: 5.7   misfit: 0.08   stationDistributionRatio: 0.43   meanDistP: 51.8   meanDistT: 46.7   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: 209°   stationPolarityCount: 17   misfit: 0.99   stationDistributionRatio: 0.37   rmsAngDiffAccPref: 50.25   fracAcc30degPref: 0.00   qualityCode: E Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1774949573489
Event info last updated: 2026.03.31-10:31:01 UTC
Event first association/location: 2026.03.31-09:39:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA