Early-est:     Fiji Islands Region    2026.08.12-22:13:34.99    q:A      mb:5.3*    Mwp:-    Mwpd:-    Td*T50Ex:0.0     fmamp_polarity:./hypo.1786572815088.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1786572815088.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1786572815088.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: 5.3* [35]    Mwp: 5.3X [1]    Mwpd: - [0]
Region: Fiji Islands Region
Origin Time: 2026.08.12-22:13:34.99 UTC
Hypocenter: lat: -17.92°  lon: -178.53°  [+/-14km]    depth: 565km  [+/-17km]
Location Quality: qualityCode:  A     stdErr: 1.1s   assocPhases: 89   usedPhases: 73
minDist: 3.3°   maxDist: 158.9°   AzGap: 91°   2ndAzGap: 142°   atten: -1.15 [+/-0.32]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 14km   azMaxHorUnc: 107°
68%ConfEllipsoid:   semiMajorAxisLength: 17km   majorAxisAzimuth: 102°   majorAxisPlunge: 38°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 303°   intermediateAxisPlunge: 50°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.0 [35]    Td: 1.9s [4]    Td*T50Ex: 0.0 [4]    To: 1.2s [35]
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:
   0.0
   0.0
   0.0
Td*To:
     2.3
     2.3
     2.3
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       565km
       565km
       565km
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.1786572815088.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):
Nodal Plane 1: strike: 32°   dip: 14°   rake: 176°
Nodal Plane 2: strike: 125°   dip: 89°   rake: 76°
Quality: azimuthalGap: -1°   stationPolarityCount: 39   misfitWeightCount: 13.6   misfit: 0.13   stationDistributionRatio: 0.71   meanDistP: 29.6   meanDistT: 28.2   qualityCode: B
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1786572815088.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.1786572815088.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 24°   dip: 17°   rake: 166°
Nodal Plane 2: strike: 128°   dip: 86°   rake: 73°
Quality: azimuthalGap: 97°   stationPolarityCount: 39   misfit: 0.14   stationDistributionRatio: 0.56   rmsAngDiffAccPref: 27.45   fracAcc30degPref: 0.78   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1786572815088.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1786572815088
Event info last updated: 2026.08.12-23:12:01 UTC
Event first association/location: 2026.08.12-22:18:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA