Early-est:     Solomon Islands    2026.10.11-14:07:20.14    q:A      mb:5.6    Mwp:6.2    Mwpd:-    Td*T50Ex:2.0     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: 5.6 [105]    Mwp: 6.2 [61]    Mwpd: 6.4Xinv [52] Region: Solomon Islands Origin Time: 2026.10.11-14:07:20.14 UTC Hypocenter: lat: -6.95°  lon: 155.73°  [+/-16km]    depth: 16km  [+/-19km] Location Quality: qualityCode:  A     stdErr: 1.1s   assocPhases: 332   usedPhases: 230 minDist: 4.5°   maxDist: 169.2°   AzGap: 21°   2ndAzGap: 39°   atten: -1.13 [+/-0.13] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 16km   azMaxHorUnc: 37° 68%ConfEllipsoid:   semiMajorAxisLength: 23km   majorAxisAzimuth: 217°   majorAxisPlunge: 44°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 308°   intermediateAxisPlunge: 1°   semiMinorAxisLength: 15km Tsunamigeneic Assesment: Discriminants: Prob Underwater: 95% T50Ex: 0.6 [97]    Td: 3.6s [27]    Td*T50Ex: 2.0 [27]    To: 32.5s [85] Closest plate boundaries:    Woodlark - Solomon Sea [oceanic transform fault]: distance: ~70km    Pacific / Solomon Sea [subduction zone]: distance: ~70km    Pacific / Woodlark [subduction zone]: distance: ~70km    Pacific - North Bismarck [oceanic convergent boundary]: distance: ~100km    North Bismarck / Solomon Sea [subduction zone]: distance: ~100km Subduction geometry:    Zone: Solomon Islands    Slab depth at epicenter: 39km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (70km)  YES (100km)  YES (70km) Prob underwater:  95%  95%  95% Td*T50Ex:    2.0    2.0    2.0 Td*To:      117.0      117.0      117.0 Mwp magnitude:        6.2        6.2        6.2 Hypocenter depth:        16km        16km        16km Slab depth at epicenter:        39km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 324°   dip: 33°   rake: 75° Nodal Plane 2: strike: 161°   dip: 58°   rake: 100° Quality: azimuthalGap: -1°   stationPolarityCount: 199   misfitWeightCount: 34.5   misfit: 0.23   stationDistributionRatio: 0.37   meanDistP: 29.6   meanDistT: 19.7   qualityCode: C 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: 128°   dip: 44°   rake: 96° Nodal Plane 2: strike: 300°   dip: 47°   rake: 85° Quality: azimuthalGap: 20°   stationPolarityCount: 199   misfit: 0.27   stationDistributionRatio: 0.51   rmsAngDiffAccPref: 40.60   fracAcc30degPref: 0.41   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 133°   dip: 54°   rake: 138° Nodal Plane 2: strike: 251°   dip: 57°   rake: 44° Quality: azimuthalGap: -1°   stationPolarityCount: 59   misfitWeightCount: 10.9   misfit: 9999.90   stationDistributionRatio: 0.14   meanDistP: 45.9   meanDistT: 31.3   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_aref
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 275°   dip: 40°   rake: 39° Nodal Plane 2: strike: 154°   dip: 66°   rake: 124° Quality: azimuthalGap: -1°   stationPolarityCount: 56   misfitWeightCount: 11.5   misfit: 9999.90   stationDistributionRatio: 0.21   meanDistP: 37.3   meanDistT: 39.8   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_mwp

Event ID: smi:KOERI/ee/event/1791727644251
Event info last updated: 2026.10.11-15:08:10 UTC
Event first association/location: 2026.10.11-14:12:41 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI