Early-est:     Fiji Islands Region    2025.08.01-05:52:04.34    q:C      mb:4.1*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1754027519965.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754027519965.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754027519965.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: 4.1* [11]    Mwp: - [0]    Mwpd: - [0]
Region: Fiji Islands Region
Origin Time: 2025.08.01-05:52:04.34 UTC
Hypocenter: lat: -21.30°  lon: -178.58°  [+/-49km]    depth: 555km  [+/-40km]
Location Quality: qualityCode:  C     stdErr: 1.9s   assocPhases: 43   usedPhases: 20
minDist: 4.8°   maxDist: 143.8°   AzGap: 138°   2ndAzGap: 141°   atten: -1.46 [+/-0.19]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 27km   maxHorUnc: 49km   azMaxHorUnc: 55°
68%ConfEllipsoid:   semiMajorAxisLength: 63km   majorAxisAzimuth: 238°   majorAxisPlunge: 19°   semiIntermediateAxisLength: 40km   intermediateAxisAzimuth: 350°   intermediateAxisPlunge: 48°   semiMinorAxisLength: 29km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.3X [2]    Td: -s [0]    Td*T50Ex: - [0]    To: 0.6Xs [2]
Closest plate boundaries:
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:
       555km
       555km
       555km
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.1754027519965.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 209°   dip: 51°   rake: -150°
Nodal Plane 2: strike: 99°   dip: 67°   rake: -43°
Quality: azimuthalGap: -1°   stationPolarityCount: 15   misfitWeightCount: 6.8   misfit: 0.06   stationDistributionRatio: 0.49   meanDistP: 48.0   meanDistT: 50.7   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754027519965.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.1754027519965.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 217°   dip: 48°   rake: -130°
Nodal Plane 2: strike: 88°   dip: 55°   rake: -55°
Quality: azimuthalGap: 135°   stationPolarityCount: 15   misfit: 0.29   stationDistributionRatio: 0.65   rmsAngDiffAccPref: 33.17   fracAcc30degPref: 0.75   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754027519965.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754027519965
Event info last updated: 2025.08.01-06:51:00 UTC
Event first association/location: 2025.08.01-05:56:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA