Early-est:     Fiji Islands Region    2026.06.27-12:35:17.88    q:B      mb:4.5*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1782563715582.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1782563715582.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1782563715582.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: 4.5* [25]    Mwp: 5.6X [1]    Mwpd: 6.0Xinv [1]
Region: Fiji Islands Region
Origin Time: 2026.06.27-12:35:17.88 UTC
Hypocenter: lat: -17.92°  lon: -178.87°  [+/-51km]    depth: 522km  [+/-39km]
Location Quality: qualityCode:  B     stdErr: 1.0s   assocPhases: 63   usedPhases: 39
minDist: 2.9°   maxDist: 150.6°   AzGap: 69°   2ndAzGap: 123°   atten: -1.59 [+/-0.33]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 28km   maxHorUnc: 51km   azMaxHorUnc: 42°
68%ConfEllipsoid:   semiMajorAxisLength: 64km   majorAxisAzimuth: 42°   majorAxisPlunge: 4°   semiIntermediateAxisLength: 42km   intermediateAxisAzimuth: 305°   intermediateAxisPlunge: 59°   semiMinorAxisLength: 31km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.0 [10]    Td: 7.1Xs [1]    Td*T50Ex: - [0]    To: 1.3s [10]
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:
       522km
       522km
       522km
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.1782563715582.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 28°   dip: 20°   rake: 24°
Nodal Plane 2: strike: 275°   dip: 82°   rake: 109°
Quality: azimuthalGap: -1°   stationPolarityCount: 30   misfitWeightCount: 9.5   misfit: 0.18   stationDistributionRatio: 0.60   meanDistP: 30.8   meanDistT: 47.3   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1782563715582.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.1782563715582.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 126°   dip: 83°   rake: -153°
Nodal Plane 2: strike: 32°   dip: 63°   rake: -8°
Quality: azimuthalGap: 90°   stationPolarityCount: 30   misfit: 0.24   stationDistributionRatio: 0.73   rmsAngDiffAccPref: 18.50   fracAcc30degPref: 0.94   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1782563715582.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1782563715582
Event info last updated: 2026.06.27-13:34:00 UTC
Event first association/location: 2026.06.27-12:40:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA