Early-est:     Tonga Islands Region    2026.06.22-20:14:07.98    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* [14]    Mwp: 5.7X [1]    Mwpd: 5.7Xinv [1] Region: Tonga Islands Region Origin Time: 2026.06.22-20:14:07.98 UTC Hypocenter: lat: -22.96°  lon: -175.09°  [+/-16km]    depth: 121km  [+/-18km] Location Quality: qualityCode:  B     stdErr: 2.1s   assocPhases: 36   usedPhases: 17 minDist: 6.2°   maxDist: 151.4°   AzGap: 132°   2ndAzGap: 165°   atten: -2.01 [+/-0.25] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 10km   maxHorUnc: 16km   azMaxHorUnc: 174° 68%ConfEllipsoid:   semiMajorAxisLength: 22km   majorAxisAzimuth: 360°   majorAxisPlunge: 37°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 146°   intermediateAxisPlunge: 48°   semiMinorAxisLength: 12km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [8]    Td: 4.7Xs [1]    Td*T50Ex: - [0]    To: 9.3s [8] Closest plate boundaries:    Tonga / Pacific [subduction zone]: distance: ~50km    Kermadec - Tonga [oceanic transform fault]: distance: ~90km    Kermadec / Pacific [subduction zone]: distance: ~90km    Tonga - Australia [oceanic spreading ridge]: distance: ~170km 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 (50km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        121km        121km        121km 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: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 341°   dip: 44°   rake: -95° Nodal Plane 2: strike: 168°   dip: 46°   rake: -85° Quality: azimuthalGap: -1°   stationPolarityCount: 13   misfitWeightCount: 5.8   misfit: 0.00   stationDistributionRatio: 0.54   meanDistP: 34.4   meanDistT: 49.9   qualityCode: C 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: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 337°   dip: 50°   rake: -106° Nodal Plane 2: strike: 182°   dip: 42°   rake: -71° Quality: azimuthalGap: 108°   stationPolarityCount: 13   misfit: 0.03   stationDistributionRatio: 0.49   rmsAngDiffAccPref: 35.78   fracAcc30degPref: 0.55   qualityCode: C Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1782159247286
Event info last updated: 2026.06.22-21:13:00 UTC
Event first association/location: 2026.06.22-20:22:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA