Early-est:     Tonga Islands    2025.08.07-03:09:16.02    q:C      mb:4.4*    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: 4.4* [12]    Mwp: - [0]    Mwpd: - [0] Region: Tonga Islands Origin Time: 2025.08.07-03:09:16.02 UTC Hypocenter: lat: -17.84°  lon: -174.26°  [+/-61km]    depth: 162km  [+/-50km] Location Quality: qualityCode:  C     stdErr: 2.5s   assocPhases: 38   usedPhases: 11 minDist: 4.3°   maxDist: 151.2°   AzGap: 91°   2ndAzGap: 148°   atten: -1.62 [+/-0.47] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 18km   maxHorUnc: 61km   azMaxHorUnc: 15° 68%ConfEllipsoid:   semiMajorAxisLength: 88km   majorAxisAzimuth: 17°   majorAxisPlunge: 31°   semiIntermediateAxisLength: 28km   intermediateAxisAzimuth: 143°   intermediateAxisPlunge: 44°   semiMinorAxisLength: 18km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.0X [3]    Td: -s [0]    Td*T50Ex: - [0]    To: 3.1Xs [3] Closest plate boundaries:    Tonga - Niuafo'ou [continental rift boundary]: distance: ~30km    Tonga / Pacific [subduction zone]: 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 (180km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        162km        162km        162km 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: 47°   dip: 41°   rake: 173° Nodal Plane 2: strike: 142°   dip: 85°   rake: 49° Quality: azimuthalGap: -1°   stationPolarityCount: 11   misfitWeightCount: 3.0   misfit: 0.08   stationDistributionRatio: 0.43   meanDistP: 51.5   meanDistT: 49.9   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: 42°   dip: 38°   rake: 166° Nodal Plane 2: strike: 143°   dip: 82°   rake: 53° Quality: azimuthalGap: 143°   stationPolarityCount: 11   misfit: 0.37   stationDistributionRatio: 0.61   rmsAngDiffAccPref: 40.11   fracAcc30degPref: 0.44   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1754536151156
Event info last updated: 2025.08.07-04:08:01 UTC
Event first association/location: 2025.08.07-03:15:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA