Early-est:     Sumbawa Region, Indonesia    2026.10.03-22:55:51.63    q:B      mb:5.4    Mwp:6.0*    Mwpd:-    Td*T50Ex:1.1     fmamp_polarity:./hypo.1791068151467.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1791068151467.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1791068151467.mech.hash.thumb.jpg

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

Earthquake Details:
Magnitude: mb: 5.4 [80]    Mwp: 6.0* [35]    Mwpd: 6.1Xinv [33]
Region: Sumbawa Region, Indonesia
Origin Time: 2026.10.03-22:55:51.63 UTC
Hypocenter: lat: -9.60°  lon: 118.91°  [+/-21km]    depth: 9km  [+/-15km]
Location Quality: qualityCode:  B     stdErr: 2.1s   assocPhases: 188   usedPhases: 128
minDist: 4.7°   maxDist: 170.5°   AzGap: 39°   2ndAzGap: 41°   atten: -1.11 [+/-0.20]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 21km   azMaxHorUnc: 57°
68%ConfEllipsoid:   semiMajorAxisLength: 26km   majorAxisAzimuth: 237°   majorAxisPlunge: 6°   semiIntermediateAxisLength: 15km   intermediateAxisAzimuth: 142°   intermediateAxisPlunge: 40°   semiMinorAxisLength: 15km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: 95%
T50Ex: 0.5 [74]    Td: 2.1s [11]    Td*T50Ex: 1.1 [11]    To: 15.2s [71]
Closest plate boundaries:
   Sunda / Australia [subduction zone]: distance: ~200km
   Sunda - Timor [continental transform fault]: distance: ~200km
Subduction geometry:    Zone: Sumatra-Java: DEBUG: error: [Errno 2] No such file or directory: 'gmt'    Slab depth at epicenter: error: evaluating slab depth: -999.9
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (200km)
 no
 no
Prob underwater:
 95%
 95%
 95%
Td*T50Ex:
   1.1
   1.1
   1.1
Td*To:
     31.9
     31.9
     31.9
Mwp magnitude:
       6.0*
       6.0*
       6.0*
Hypocenter depth:
       9km
       9km
       9km
Slab depth at epicenter:
       n/a
       -
       -
Tsunami and Rupture predictions (TEST!): No prediction: Event too small (Mwp<7.0) or too few Mwp readings (N<20)
./hypo.1791068151467.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 247°   dip: 59°   rake: -159°
Nodal Plane 2: strike: 146°   dip: 72°   rake: -33°
Quality: azimuthalGap: -1°   stationPolarityCount: 84   misfitWeightCount: 12.5   misfit: 0.17   stationDistributionRatio: 0.48   meanDistP: 49.9   meanDistT: 43.6   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1791068151467.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 91°   dip: 67°   rake: -172°
Nodal Plane 2: strike: 358°   dip: 83°   rake: -24°
Quality: azimuthalGap: -1°   stationPolarityCount: 19   misfitWeightCount: 5.7   misfit: 0.00   stationDistributionRatio: 0.35   meanDistP: 47.3   meanDistT: 53.1   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity_waveform
./hypo.1791068151467.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 268°   dip: 80°   rake: -171°
Nodal Plane 2: strike: 177°   dip: 81°   rake: -11°
Quality: azimuthalGap: 71°   stationPolarityCount: 84   misfit: 0.41   stationDistributionRatio: 0.62   rmsAngDiffAccPref: 47.45   fracAcc30degPref: 0.32   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1791068151467.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1791068151467
Event info last updated: 2026.10.03-23:54:01 UTC
Event first association/location: 2026.10.03-23:01:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA