Early-est:     Southern Sumatra, Indonesia    2026.08.10-17:08:16.92    q:C      mb:4.7*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1786381696918.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1786381696918.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1786381696918.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: 4.7* [15]    Mwp: - [0]    Mwpd: - [0]
Region: Southern Sumatra, Indonesia
Origin Time: 2026.08.10-17:08:16.92 UTC
Hypocenter: lat: -5.32°  lon: 102.99°  [+/-33km]    depth: 68km  [+/-38km]
Location Quality: qualityCode:  C     stdErr: 1.2s   assocPhases: 39   usedPhases: 18
minDist: 1.0°   maxDist: 147.6°   AzGap: 198°   2ndAzGap: 207°   atten: -1.05 [+/-0.89]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 33km   azMaxHorUnc: 36°
68%ConfEllipsoid:   semiMajorAxisLength: 49km   majorAxisAzimuth: 36°   majorAxisPlunge: 41°   semiIntermediateAxisLength: 26km   intermediateAxisAzimuth: 211°   intermediateAxisPlunge: 49°   semiMinorAxisLength: 17km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.6 [12]    Td: -s [0]    Td*T50Ex: - [0]    To: 8.6s [11]
Closest plate boundaries:
   Sunda / Australia [subduction zone]: distance: ~190km
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 (190km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       68km
       68km
       68km
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.1786381696918.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 294°   dip: 15°   rake: -105°
Nodal Plane 2: strike: 129°   dip: 76°   rake: -86°
Quality: azimuthalGap: -1°   stationPolarityCount: 13   misfitWeightCount: 2.7   misfit: 0.13   stationDistributionRatio: 0.37   meanDistP: 51.4   meanDistT: 56.2   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1786381696918.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (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/_polarity_waveform
./hypo.1786381696918.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 227°   dip: 24°   rake: 153°
Nodal Plane 2: strike: 343°   dip: 79°   rake: 68°
Quality: azimuthalGap: 142°   stationPolarityCount: 14   misfit: 0.39   stationDistributionRatio: 0.79   rmsAngDiffAccPref: 44.65   fracAcc30degPref: 0.43   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1786381696918.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1786381696918
Event info last updated: 2026.08.10-18:07:01 UTC
Event first association/location: 2026.08.10-17:54:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA