Early-est:     Fiji Islands Region    2025.08.05-02:04:48.95    q:C      mb:4.2*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1754359488866.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754359488866.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754359488866.mech.hash.thumb.jpg

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details:
Magnitude: mb: 4.2* [6]    Mwp: - [0]    Mwpd: - [0]
Region: Fiji Islands Region
Origin Time: 2025.08.05-02:04:48.95 UTC
Hypocenter: lat: -21.04°  lon: -178.21°  [+/-15km]    depth: 534km  [+/-14km]
Location Quality: qualityCode:  C     stdErr: 1.4s   assocPhases: 37   usedPhases: 13
minDist: 4.8°   maxDist: 148.7°   AzGap: 199°   2ndAzGap: 262°   atten: -1.36 [+/-0.45]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 15km   azMaxHorUnc: 26°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 207°   majorAxisPlunge: 7°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 297°   intermediateAxisPlunge: 2°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.0X [1]    Td: -s [0]    Td*T50Ex: - [0]    To: 0.7Xs [1]
Closest plate boundaries:
   Tonga - Australia [oceanic spreading ridge]: distance: ~190km
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?:
 no
 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)
./hypo.1754359488866.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 170°   dip: 45°   rake: 60°
Nodal Plane 2: strike: 29°   dip: 52°   rake: 117°
Quality: azimuthalGap: -1°   stationPolarityCount: 9   misfitWeightCount: 2.6   misfit: 0.04   stationDistributionRatio: 0.24   meanDistP: 53.9   meanDistT: 47.4   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754359488866.mech.fmamp_polarity.mechanism.jpg
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
./hypo.1754359488866.mech.fmamp_polarity_waveform.mechanism.jpg
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: 199°   stationPolarityCount: 9   misfit: 0.99   stationDistributionRatio: 0.78   rmsAngDiffAccPref: 42.48   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754359488866.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754359488866
Event info last updated: 2025.08.05-03:03:01 UTC
Event first association/location: 2025.08.05-02:26:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA