Early-est:     Southern Molucca Sea    2025.12.13-11:45:09.08    q:B      mb:4.1    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:     hash:     fmamp_amp_aref:     fmamp_amp_mwp:

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

Earthquake Details: Magnitude: mb: 4.1 [6]    Mwp: - [0]    Mwpd: - [0] Region: Southern Molucca Sea Origin Time: 2025.12.13-11:45:09.08 UTC Hypocenter: lat: -0.70°  lon: 124.57°  [+/-15km]    depth: 509km  [+/-18km] Location Quality: qualityCode:  B     stdErr: 1.1s   assocPhases: 12   usedPhases: 12 minDist: 12.7°   maxDist: 126.1°   AzGap: 160°   2ndAzGap: 219°   atten: -2.11 [+/-0.92] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 15km   azMaxHorUnc: 133° 68%ConfEllipsoid:   semiMajorAxisLength: 20km   majorAxisAzimuth: 321°   majorAxisPlunge: 36°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 113°   intermediateAxisPlunge: 50°   semiMinorAxisLength: 13km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.0 [5]    Td: -s [0]    Td*T50Ex: - [0]    To: 0.9Xs [3] Closest plate boundaries:    Molucca Sea - Sunda [oceanic transform fault]: distance: ~60km    Molucca Sea / Sunda [subduction zone]: distance: ~80km    Molucca Sea - Birds Head [continental transform fault]: distance: ~160km    Molucca Sea \ Birds Head [subduction zone]: distance: ~160km    Molucca Sea \ Sunda [subduction zone]: distance: ~180km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (80km)  no  YES (60km) Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        509km        509km        509km Slab depth at epicenter:        n/a        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 64°   dip: 20°   rake: -52° Nodal Plane 2: strike: 204°   dip: 74°   rake: -103° Quality: azimuthalGap: -1°   stationPolarityCount: 8   misfitWeightCount: 2.7   misfit: 0.09   stationDistributionRatio: 0.37   meanDistP: 45.4   meanDistT: 47.9   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
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: 315°   stationPolarityCount: 8   misfit: 0.99   stationDistributionRatio: 0.50   rmsAngDiffAccPref: 26.87   fracAcc30degPref: 0.00   qualityCode: E Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (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/_amp_aref
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (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/_amp_mwp

Event ID: smi:KOERI/ee/event/1765626309041
Event info last updated: 2025.12.13-12:45:18 UTC
Event first association/location: 2025.12.13-11:52:25 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI