Early-est:     Banda Sea    2025.12.08-20:39:40.41    q:B      mb:4.5    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1765226381481.mech.fmamp_polarity.thumb.jpg     hash:./hypo.1765226381481.mech.hash.thumb.jpg     fmamp_amp_aref:./hypo.1765226381481.mech.fmamp_amp_aref.thumb.jpg     fmamp_amp_mwp:./hypo.1765226381481.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: 4.5 [20]    Mwp: - [0]    Mwpd: - [0]
Region: Banda Sea
Origin Time: 2025.12.08-20:39:40.41 UTC
Hypocenter: lat: -7.33°  lon: 129.14°  [+/-14km]    depth: 137km  [+/-17km]
Location Quality: qualityCode:  B     stdErr: 1.2s   assocPhases: 60   usedPhases: 23
minDist: 6.3°   maxDist: 138.7°   AzGap: 104°   2ndAzGap: 114°   atten: -1.39 [+/-0.28]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 14km   azMaxHorUnc: 80°
68%ConfEllipsoid:   semiMajorAxisLength: 18km   majorAxisAzimuth: 263°   majorAxisPlunge: 38°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 73°   intermediateAxisPlunge: 52°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.3 [11]    Td: 0.2Xs [1]    Td*T50Ex: - [0]    To: 1.5s [6]
Closest plate boundaries:
   Banda Sea - Timor [oceanic convergent boundary]: distance: ~90km
   Timor - Australia [continental transform fault]: distance: ~190km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 YES (90km)
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       137km
       137km
       137km
Slab depth at epicenter:
       n/a
       -
       -
./hypo.1765226381481.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 214°   dip: 6°   rake: -80°
Nodal Plane 2: strike: 24°   dip: 84°   rake: -91°
Quality: azimuthalGap: -1°   stationPolarityCount: 18   misfitWeightCount: 7.3   misfit: 0.13   stationDistributionRatio: 0.55   meanDistP: 34.5   meanDistT: 35.6   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1765226381481.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 279°   dip: 20°   rake: -25°
Nodal Plane 2: strike: 32°   dip: 82°   rake: -109°
Quality: azimuthalGap: 105°   stationPolarityCount: 18   misfit: 0.23   stationDistributionRatio: 0.78   rmsAngDiffAccPref: 35.66   fracAcc30degPref: 0.57   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1765226381481.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.1765226381481.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.1765226381481.mech.fmamp_amp_mwp.mechanism.jpg

Event ID: smi:KOERI/ee/event/1765226381481
Event info last updated: 2025.12.08-21:40:02 UTC
Event first association/location: 2025.12.08-20:45:02 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI