Early-est:     Borneo    2026.10.06-13:11:27.87    q:B      mb:5.0    Mwp:-    Mwpd:-    Td*T50Ex:0.7     fmamp_polarity:./hypo.1791292290626.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1791292290626.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1791292290626.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1791292290626.mech.fmamp_amp_mwp.thumb.jpg

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

Earthquake Details:
Magnitude: mb: 5.0 [39]    Mwp: 5.0X [1]    Mwpd: - [0]
Region: Borneo
Origin Time: 2026.10.06-13:11:27.87 UTC
Hypocenter: lat: 4.78°  lon: 118.74°  [+/-13km]    depth: 31km  [+/-18km]
Location Quality: qualityCode:  B     stdErr: 1.0s   assocPhases: 85   usedPhases: 44
minDist: 6.9°   maxDist: 132.1°   AzGap: 111°   2ndAzGap: 144°   atten: -0.68 [+/-0.22]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 13km   azMaxHorUnc: 159°
68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 307°   majorAxisPlunge: 66°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 176°   intermediateAxisPlunge: 16°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [24]    Td: 2.0s [5]    Td*T50Ex: 0.7 [5]    To: 2.3s [19]
Closest plate boundaries:
   Molucca Sea / Sunda [subduction zone]: distance: ~320km
   Banda Sea / Sunda [subduction zone]: distance: ~550km
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:
   0.7
   0.7
   0.7
Td*To:
     4.6
     4.6
     4.6
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       31km
       31km
       31km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1791292290626.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 160°   dip: 26°   rake: -98°
Nodal Plane 2: strike: 349°   dip: 64°   rake: -86°
Quality: azimuthalGap: -1°   stationPolarityCount: 36   misfitWeightCount: 8.2   misfit: 0.09   stationDistributionRatio: 0.50   meanDistP: 27.2   meanDistT: 37.5   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1791292290626.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 215°   dip: 29°   rake: -57°
Nodal Plane 2: strike: 358°   dip: 66°   rake: -107°
Quality: azimuthalGap: 111°   stationPolarityCount: 36   misfit: 0.22   stationDistributionRatio: 0.73   rmsAngDiffAccPref: 28.00   fracAcc30degPref: 0.77   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1791292290626.mech.hash.mechanism.jpg
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
./hypo.1791292290626.mech.fmamp_amp_aref.mechanism.jpg
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
./hypo.1791292290626.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1791292290626
Event info last updated: 2026.10.06-14:11:33 UTC
Event first association/location: 2026.10.06-13:18:02 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI