Early-est:     South of Fiji Islands    2025.04.11-23:53:17.17    q:C      mb:4.6*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1744415598576.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1744415598576.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1744415598576.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: 4.6* [12]    Mwp: - [0]    Mwpd: - [0]
Region: South of Fiji Islands
Origin Time: 2025.04.11-23:53:17.17 UTC
Hypocenter: lat: -23.77°  lon: -179.85°  [+/-28km]    depth: 502km  [+/-42km]
Location Quality: qualityCode:  C     stdErr: 1.5s   assocPhases: 42   usedPhases: 19
minDist: 6.3°   maxDist: 159.3°   AzGap: 138°   2ndAzGap: 209°   atten: -0.86 [+/-0.26]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 23km   maxHorUnc: 28km   azMaxHorUnc: 11°
68%ConfEllipsoid:   semiMajorAxisLength: 48km   majorAxisAzimuth: 7°   majorAxisPlunge: 54°   semiIntermediateAxisLength: 29km   intermediateAxisAzimuth: 267°   intermediateAxisPlunge: 7°   semiMinorAxisLength: 25km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.0 [6]    Td: -s [0]    Td*T50Ex: - [0]    To: 0.9s [6]
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:
       502km
       502km
       502km
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.1744415598576.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 322°   dip: 31°   rake: 79°
Nodal Plane 2: strike: 154°   dip: 60°   rake: 97°
Quality: azimuthalGap: -1°   stationPolarityCount: 11   misfitWeightCount: 3.9   misfit: 0.04   stationDistributionRatio: 0.41   meanDistP: 53.4   meanDistT: 52.6   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1744415598576.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.1744415598576.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 167°   dip: 70°   rake: 127°
Nodal Plane 2: strike: 282°   dip: 41°   rake: 32°
Quality: azimuthalGap: 123°   stationPolarityCount: 11   misfit: 0.39   stationDistributionRatio: 0.63   rmsAngDiffAccPref: 40.35   fracAcc30degPref: 0.47   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1744415598576.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1744415598576
Event info last updated: 2025.04.12-00:52:00 UTC
Event first association/location: 2025.04.12-00:04:04 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA