Early-est:     Sumbawa Region, Indonesia    2026.10.06-20:15:16.77    q:C      mb:4.9    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1791317724471.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1791317724471.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1791317724471.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1791317724471.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: 4.9 [26]    Mwp: - [0]    Mwpd: - [0]
Region: Sumbawa Region, Indonesia
Origin Time: 2026.10.06-20:15:16.77 UTC
Hypocenter: lat: -8.60°  lon: 116.02°  [+/-28km]    depth: 20km  [+/-76km]
Location Quality: qualityCode:  C     stdErr: 1.4s   assocPhases: 61   usedPhases: 37
minDist: 13.1°   maxDist: 147.4°   AzGap: 86°   2ndAzGap: 97°   atten: -0.76 [+/-0.28]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 20km   maxHorUnc: 28km   azMaxHorUnc: 42°
68%ConfEllipsoid:   semiMajorAxisLength: 77km   majorAxisAzimuth: 168°   majorAxisPlunge: 79°   semiIntermediateAxisLength: 33km   intermediateAxisAzimuth: 50°   intermediateAxisPlunge: 5°   semiMinorAxisLength: 23km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [12]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.5s [8]
Closest plate boundaries:
   Sunda / Australia [subduction zone]: distance: ~300km
Subduction geometry:    Zone: Sumatra-Java    Slab depth at epicenter: 149km
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:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       20km
       20km
       20km
Slab depth at epicenter:
       149km
       -
       -
./hypo.1791317724471.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 155°   dip: 39°   rake: 45°
Nodal Plane 2: strike: 27°   dip: 63°   rake: 120°
Quality: azimuthalGap: -1°   stationPolarityCount: 31   misfitWeightCount: 8.0   misfit: 0.19   stationDistributionRatio: 0.36   meanDistP: 45.2   meanDistT: 39.0   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1791317724471.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 257°   dip: 75°   rake: -168°
Nodal Plane 2: strike: 164°   dip: 78°   rake: -15°
Quality: azimuthalGap: 85°   stationPolarityCount: 31   misfit: 0.34   stationDistributionRatio: 0.65   rmsAngDiffAccPref: 19.89   fracAcc30degPref: 0.87   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1791317724471.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.1791317724471.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.1791317724471.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1791317724471
Event info last updated: 2026.10.06-21:15:00 UTC
Event first association/location: 2026.10.06-20:33:28 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI