Early-est:     Sumba Region, Indonesia    2026.10.08-18:06:01.75    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 [25]    Mwp: - [0]    Mwpd: - [0] Region: Sumba Region, Indonesia Origin Time: 2026.10.08-18:06:01.75 UTC Hypocenter: lat: -9.37°  lon: 120.16°  [+/-17km]    depth: 80km  [+/-19km] Location Quality: qualityCode:  B     stdErr: 1.2s   assocPhases: 84   usedPhases: 33 minDist: 4.4°   maxDist: 153.1°   AzGap: 94°   2ndAzGap: 98°   atten: -0.86 [+/-0.25] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 17km   azMaxHorUnc: 78° 68%ConfEllipsoid:   semiMajorAxisLength: 22km   majorAxisAzimuth: 82°   majorAxisPlunge: 32°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 228°   intermediateAxisPlunge: 53°   semiMinorAxisLength: 15km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.5 [17]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.5s [9] Closest plate boundaries:    Sunda - Timor [continental transform fault]: distance: ~60km    Banda Sea - Sunda [continental transform fault]: distance: ~180km    Banda Sea - Timor [oceanic convergent boundary]: distance: ~180km    Sunda / Australia [subduction zone]: distance: ~230km Subduction geometry:    Zone: Sumatra-Java    Slab depth at epicenter: 69km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (230km)  no  YES (60km) Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        80km        80km        80km Slab depth at epicenter:        69km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 25°   dip: 21°   rake: 135° Nodal Plane 2: strike: 158°   dip: 75°   rake: 75° Quality: azimuthalGap: -1°   stationPolarityCount: 40   misfitWeightCount: 13.9   misfit: 0.23   stationDistributionRatio: 0.44   meanDistP: 34.2   meanDistT: 33.6   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: 23°   dip: 65°   rake: 138° Nodal Plane 2: strike: 134°   dip: 53°   rake: 32° Quality: azimuthalGap: 94°   stationPolarityCount: 40   misfit: 0.50   stationDistributionRatio: 0.64   rmsAngDiffAccPref: 47.04   fracAcc30degPref: 0.57   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/1791482761710
Event info last updated: 2026.10.08-19:07:06 UTC
Event first association/location: 2026.10.08-18:10:23 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI