Early-est:     Sumbawa Region, Indonesia    2026.10.06-20:15:28.27    q:B      mb:4.7    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1791317728266.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1791317728266.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1791317728266.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1791317728266.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 [28]    Mwp: - [0]    Mwpd: - [0]
Region: Sumbawa Region, Indonesia
Origin Time: 2026.10.06-20:15:28.27 UTC
Hypocenter: lat: -8.66°  lon: 116.19°  [+/-13km]    depth: 137km  [+/-15km]
Location Quality: qualityCode:  B     stdErr: 1.4s   assocPhases: 62   usedPhases: 38
minDist: 5.1°   maxDist: 147.4°   AzGap: 76°   2ndAzGap: 85°   atten: -1.02 [+/-0.26]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 13km   azMaxHorUnc: 76°
68%ConfEllipsoid:   semiMajorAxisLength: 17km   majorAxisAzimuth: 80°   majorAxisPlunge: 40°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 242°   intermediateAxisPlunge: 49°   semiMinorAxisLength: 13km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: 10%
T50Ex: 0.4 [12]    Td: 0.4Xs [1]    Td*T50Ex: - [0]    To: 1.5s [8]
Closest plate boundaries:
   Sunda / Australia [subduction zone]: distance: ~290km
Subduction geometry:    Zone: Sumatra-Java    Slab depth at epicenter: 148km
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (290km)
 no
 no
Prob underwater:
 10%
 10%
 10%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       137km
       137km
       137km
Slab depth at epicenter:
       148km
       -
       -
./hypo.1791317728266.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 152°   dip: 73°   rake: -14°
Nodal Plane 2: strike: 246°   dip: 77°   rake: -162°
Quality: azimuthalGap: -1°   stationPolarityCount: 34   misfitWeightCount: 10.8   misfit: 0.18   stationDistributionRatio: 0.44   meanDistP: 40.2   meanDistT: 48.3   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1791317728266.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 259°   dip: 68°   rake: -162°
Nodal Plane 2: strike: 162°   dip: 74°   rake: -23°
Quality: azimuthalGap: 85°   stationPolarityCount: 34   misfit: 0.36   stationDistributionRatio: 0.67   rmsAngDiffAccPref: 22.39   fracAcc30degPref: 0.85   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1791317728266.mech.hash.mechanism.jpg
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
./hypo.1791317728266.mech.fmamp_amp_aref.mechanism.jpg
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
./hypo.1791317728266.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1791317728266
Event info last updated: 2026.10.06-21:16:02 UTC
Event first association/location: 2026.10.06-21:15:22 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI