Early-est:     Solomon Islands    2026.10.05-22:48:41.99    q:B      mb:4.7    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: 4.7 [18]    Mwp: - [0]    Mwpd: - [0] Region: Solomon Islands Origin Time: 2026.10.05-22:48:41.99 UTC Hypocenter: lat: -4.82°  lon: 154.71°  [+/-11km]    depth: 90km  [+/-14km] Location Quality: qualityCode:  B     stdErr: 1.7s   assocPhases: 41   usedPhases: 22 minDist: 8.8°   maxDist: 118.1°   AzGap: 106°   2ndAzGap: 137°   atten: -1.43 [+/-0.44] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 9km   maxHorUnc: 11km   azMaxHorUnc: 7° 68%ConfEllipsoid:   semiMajorAxisLength: 15km   majorAxisAzimuth: 193°   majorAxisPlunge: 53°   semiIntermediateAxisLength: 13km   intermediateAxisAzimuth: 354°   intermediateAxisPlunge: 35°   semiMinorAxisLength: 12km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.0 [15]    Td: 0.6Xs [1]    Td*T50Ex: - [0]    To: 0.9s [13] Closest plate boundaries:    Pacific - North Bismarck [oceanic transform fault]: distance: ~30km    North Bismarck - South Bismarck [oceanic transform fault]: distance: ~160km    South Bismarck / Solomon Sea [subduction zone]: distance: ~180km    North Bismarck / Solomon Sea [subduction zone]: distance: ~180km    Pacific / Solomon Sea [subduction zone]: distance: ~280km Subduction geometry:    Zone: Solomon Islands    Slab depth at epicenter: 400km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (180km)  no  YES (30km) Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        90km        90km        90km Slab depth at epicenter:        400km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 27°   dip: 47°   rake: -170° Nodal Plane 2: strike: 290°   dip: 83°   rake: -43° Quality: azimuthalGap: -1°   stationPolarityCount: 19   misfitWeightCount: 4.3   misfit: 0.10   stationDistributionRatio: 0.57   meanDistP: 37.3   meanDistT: 42.1   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (No solution available) Nodal Plane 1: strike: 999°   dip: 99°   rake: 999° Nodal Plane 2: strike: 324°   dip: 13°   rake: 135° Quality: azimuthalGap: 258°   stationPolarityCount: 19   misfit: 0.99   stationDistributionRatio: 0.60   rmsAngDiffAccPref: 32.52   fracAcc30degPref: 0.00   qualityCode: E 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/1791240521705
Event info last updated: 2026.10.05-23:49:03 UTC
Event first association/location: 2026.10.05-23:02:06 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI