Early-est:     Tonga Islands Region    2026.06.22-12:39:23.18    q:B      mb:4.9*    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: 4.9* [13]    Mwp: - [0]    Mwpd: - [0] Region: Tonga Islands Region Origin Time: 2026.06.22-12:39:23.18 UTC Hypocenter: lat: -23.24°  lon: -175.09°  [+/-11km]    depth: 112km  [+/-18km] Location Quality: qualityCode:  B     stdErr: 1.0s   assocPhases: 29   usedPhases: 20 minDist: 6.4°   maxDist: 159.7°   AzGap: 100°   2ndAzGap: 160°   atten: -2.01 [+/-0.29] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 9km   maxHorUnc: 11km   azMaxHorUnc: 171° 68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 113°   majorAxisPlunge: 76°   semiIntermediateAxisLength: 13km   intermediateAxisAzimuth: 356°   intermediateAxisPlunge: 6°   semiMinorAxisLength: 10km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [9]    Td: 3.7Xs [2]    Td*T50Ex: - [0]    To: 11.5s [6] Closest plate boundaries:    Tonga / Pacific [subduction zone]: distance: ~40km    Kermadec - Tonga [oceanic transform fault]: distance: ~60km    Kermadec / Pacific [subduction zone]: distance: ~60km    Tonga - Australia [oceanic spreading ridge]: distance: ~180km 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 (40km)  no  YES (60km) Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        112km        112km        112km 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: 41°   dip: 13°   rake: -54° Nodal Plane 2: strike: 185°   dip: 80°   rake: -98° Quality: azimuthalGap: -1°   stationPolarityCount: 14   misfitWeightCount: 5.9   misfit: 0.04   stationDistributionRatio: 0.49   meanDistP: 43.6   meanDistT: 42.3   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: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 184°   dip: 65°   rake: -112° Nodal Plane 2: strike: 48°   dip: 33°   rake: -51° Quality: azimuthalGap: 88°   stationPolarityCount: 14   misfit: 0.32   stationDistributionRatio: 0.40   rmsAngDiffAccPref: 46.95   fracAcc30degPref: 0.29   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1782131967580
Event info last updated: 2026.06.22-13:38:02 UTC
Event first association/location: 2026.06.22-12:50:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA