Early-est:     Banda Sea    2026.08.12-18:58:26.00    q:B      mb:4.6*    Mwp:-    Mwpd:-    Td*T50Ex:0.1     fmamp_polarity:./hypo.1786561106465.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1786561106465.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1786561106465.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: 4.6* [14]    Mwp: - [0]    Mwpd: - [0]
Region: Banda Sea
Origin Time: 2026.08.12-18:58:26.00 UTC
Hypocenter: lat: -6.53°  lon: 129.56°  [+/-14km]    depth: 140km  [+/-17km]
Location Quality: qualityCode:  B     stdErr: 1.6s   assocPhases: 20   usedPhases: 16
minDist: 4.5°   maxDist: 87.2°   AzGap: 53°   2ndAzGap: 93°   atten: -1.89 [+/-0.26]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 14km   azMaxHorUnc: 41°
68%ConfEllipsoid:   semiMajorAxisLength: 17km   majorAxisAzimuth: 41°   majorAxisPlunge: 37°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 221°   intermediateAxisPlunge: 53°   semiMinorAxisLength: 15km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.6 [9]    Td: 0.2s [4]    Td*T50Ex: 0.1 [4]    To: 5.3s [8]
Closest plate boundaries:
   Banda Sea - Timor [continental convergent boundary]: distance: ~30km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 YES (30km)
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   0.1
   0.1
   0.1
Td*To:
     1.1
     1.1
     1.1
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       140km
       140km
       140km
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.1786561106465.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (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
./hypo.1786561106465.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.1786561106465.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (No solution available)
Nodal Plane 1: strike: 999°   dip: 99°   rake: 999°
Nodal Plane 2: strike: 324°   dip: 13°   rake: 135°
Quality: azimuthalGap: 0°   stationPolarityCount: 7   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: F
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1786561106465.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1786561106465
Event info last updated: 2026.08.12-19:57:00 UTC
Event first association/location: 2026.08.12-19:03:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA