Early-est:     Sumbawa Region, Indonesia    2026.10.08-05:06:46.31    q:C      mb:4.7    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1791436006547.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1791436006547.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1791436006547.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1791436006547.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: 4.7 [15]    Mwp: - [0]    Mwpd: - [0]
Region: Sumbawa Region, Indonesia
Origin Time: 2026.10.08-05:06:46.31 UTC
Hypocenter: lat: -9.70°  lon: 118.78°  [+/-15km]    depth: 10km  [+/-14km]
Location Quality: qualityCode:  C     stdErr: 1.9s   assocPhases: 63   usedPhases: 25
minDist: 4.8°   maxDist: 153.1°   AzGap: 81°   2ndAzGap: 98°   atten: -0.62 [+/-0.30]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 10km   maxHorUnc: 15km   azMaxHorUnc: 78°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 256°   majorAxisPlunge: 12°   semiIntermediateAxisLength: 14km   intermediateAxisAzimuth: 151°   intermediateAxisPlunge: 52°   semiMinorAxisLength: 12km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.7 [9]    Td: 7.4Xs [1]    Td*T50Ex: - [0]    To: 6.1Xs [3]
Closest plate boundaries:
   Sunda / Australia [subduction zone]: distance: ~190km
Subduction geometry:    Zone: Sumatra-Java    Slab depth at epicenter: 37km
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (190km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       10km
       10km
       10km
Slab depth at epicenter:
       37km
       -
       -
./hypo.1791436006547.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 4°   dip: 19°   rake: 148°
Nodal Plane 2: strike: 124°   dip: 80°   rake: 74°
Quality: azimuthalGap: -1°   stationPolarityCount: 25   misfitWeightCount: 5.7   misfit: 0.13   stationDistributionRatio: 0.26   meanDistP: 48.1   meanDistT: 32.9   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1791436006547.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 59°   dip: 72°   rake: 90°
Nodal Plane 2: strike: 239°   dip: 18°   rake: 90°
Quality: azimuthalGap: 76°   stationPolarityCount: 25   misfit: 0.19   stationDistributionRatio: 0.66   rmsAngDiffAccPref: 38.20   fracAcc30degPref: 0.43   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1791436006547.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.1791436006547.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.1791436006547.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1791436006547
Event info last updated: 2026.10.08-06:07:03 UTC
Event first association/location: 2026.10.08-05:14:01 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI