Early-est:     Fiji Islands Region    2026.10.11-12:05:15.13    q:B      mb:4.3    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:     hash:     fmamp_amp_aref:     fmamp_amp_mwp:

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

Earthquake Details: Magnitude: mb: 4.3 [15]    Mwp: - [0]    Mwpd: - [0] Region: Fiji Islands Region Origin Time: 2026.10.11-12:05:15.13 UTC Hypocenter: lat: -17.95°  lon: -179.69°  [+/-20km]    depth: 637km  [+/-18km] Location Quality: qualityCode:  B     stdErr: 0.9s   assocPhases: 27   usedPhases: 25 minDist: 2.2°   maxDist: 146.9°   AzGap: 182°   2ndAzGap: 217°   atten: -1.38 [+/-0.48] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 15km   maxHorUnc: 20km   azMaxHorUnc: 167° 68%ConfEllipsoid:   semiMajorAxisLength: 25km   majorAxisAzimuth: 167°   majorAxisPlunge: 5°   semiIntermediateAxisLength: 19km   intermediateAxisAzimuth: 258°   intermediateAxisPlunge: 11°   semiMinorAxisLength: 18km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.0 [5]    Td: -s [0]    Td*T50Ex: - [0]    To: 0.7s [5] Closest plate boundaries: Subduction geometry: none or not available 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:        637km        637km        637km Slab depth at epicenter:        n/a        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 40°   dip: 5°   rake: 52° Nodal Plane 2: strike: 258°   dip: 86°   rake: 93° Quality: azimuthalGap: -1°   stationPolarityCount: 19   misfitWeightCount: 4.7   misfit: 0.09   stationDistributionRatio: 0.62   meanDistP: 29.9   meanDistT: 40.1   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 317°   dip: 21°   rake: -37° Nodal Plane 2: strike: 82°   dip: 77°   rake: -107° Quality: azimuthalGap: 99°   stationPolarityCount: 19   misfit: 0.20   stationDistributionRatio: 0.58   rmsAngDiffAccPref: 38.95   fracAcc30degPref: 0.42   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (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/_amp_aref
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (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/_amp_mwp

Event ID: smi:KOERI/ee/event/1791720314851
Event info last updated: 2026.10.11-13:06:03 UTC
Event first association/location: 2026.10.11-12:24:04 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI