Early-est:     Flores Region, Indonesia    2026.10.04-10:13:09.97    q:B      mb:4.6    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: 4.6 [19]    Mwp: 5.0X [1]    Mwpd: - [0] Region: Flores Region, Indonesia Origin Time: 2026.10.04-10:13:09.97 UTC Hypocenter: lat: -8.23°  lon: 120.51°  [+/-14km]    depth: 13km  [+/-14km] Location Quality: qualityCode:  B     stdErr: 0.9s   assocPhases: 56   usedPhases: 25 minDist: 3.3°   maxDist: 154.0°   AzGap: 125°   2ndAzGap: 139°   atten: -0.78 [+/-0.22] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 14km   azMaxHorUnc: 67° 68%ConfEllipsoid:   semiMajorAxisLength: 17km   majorAxisAzimuth: 66°   majorAxisPlunge: 12°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 335°   intermediateAxisPlunge: 7°   semiMinorAxisLength: 14km Tsunamigeneic Assesment: Discriminants: Prob Underwater: 76% T50Ex: 0.6 [12]    Td: 2.5Xs [2]    Td*T50Ex: - [0]    To: 13.4s [7] Closest plate boundaries:    Sunda - Timor [continental transform fault]: distance: ~20km    Banda Sea - Sunda [continental transform fault]: distance: ~50km    Banda Sea - Timor [oceanic convergent boundary]: distance: ~50km Subduction geometry:    Zone: Sumatra-Java    Slab depth at epicenter: 240km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  no  YES (50km)  YES (20km) Prob underwater:  76%  76%  76% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        13km        13km        13km Slab depth at epicenter:        240km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 121°   dip: 11°   rake: -29° Nodal Plane 2: strike: 240°   dip: 85°   rake: -100° Quality: azimuthalGap: -1°   stationPolarityCount: 22   misfitWeightCount: 6.0   misfit: 0.12   stationDistributionRatio: 0.51   meanDistP: 34.7   meanDistT: 26.4   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: 102°   dip: 19°   rake: -46° Nodal Plane 2: strike: 236°   dip: 77°   rake: -103° Quality: azimuthalGap: 145°   stationPolarityCount: 22   misfit: 0.25   stationDistributionRatio: 0.68   rmsAngDiffAccPref: 38.97   fracAcc30degPref: 0.44   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: nan° Nodal Plane 2: strike: nan°   dip: nan°   rake: nan° 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: nan° Nodal Plane 2: strike: nan°   dip: nan°   rake: nan° 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/1791108790099
Event info last updated: 2026.10.04-11:13:13 UTC
Event first association/location: 2026.10.04-10:18:29 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI