Early-est:     Northern Molucca Sea    2025.12.09-18:02:36.74    q:B      mb:4.5    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: 4.5 [24]    Mwp: 4.2X [1]    Mwpd: - [0] Region: Northern Molucca Sea Origin Time: 2025.12.09-18:02:36.74 UTC Hypocenter: lat: 1.48°  lon: 126.50°  [+/-14km]    depth: 109km  [+/-18km] Location Quality: qualityCode:  B     stdErr: 1.5s   assocPhases: 54   usedPhases: 28 minDist: 9.4°   maxDist: 148.0°   AzGap: 112°   2ndAzGap: 168°   atten: -0.74 [+/-0.21] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 14km   azMaxHorUnc: 81° 68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 247°   majorAxisPlunge: 66°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 86°   intermediateAxisPlunge: 23°   semiMinorAxisLength: 14km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [13]    Td: 0.9Xs [1]    Td*T50Ex: - [0]    To: 1.5s [9] Closest plate boundaries:    Birds Head / Sunda [subduction zone]: distance: ~30km    Molucca Sea \ Sunda [subduction zone]: distance: ~30km    Molucca Sea \ Birds Head [subduction zone]: distance: ~30km    Sunda - Birds Head [oceanic convergent boundary]: distance: ~100km    Molucca Sea / Sunda [subduction zone]: distance: ~160km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (30km)  YES (100km)  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        109km        109km        109km Slab depth at epicenter:        n/a        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 171°   dip: 5°   rake: 18° Nodal Plane 2: strike: 63°   dip: 88°   rake: 95° Quality: azimuthalGap: -1°   stationPolarityCount: 25   misfitWeightCount: 7.0   misfit: 0.19   stationDistributionRatio: 0.54   meanDistP: 36.7   meanDistT: 40.0   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 183°   dip: 22°   rake: 6° Nodal Plane 2: strike: 88°   dip: 88°   rake: 112° Quality: azimuthalGap: 112°   stationPolarityCount: 25   misfit: 0.38   stationDistributionRatio: 0.73   rmsAngDiffAccPref: 54.83   fracAcc30degPref: 0.29   qualityCode: D 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/1765303360913
Event info last updated: 2025.12.09-19:02:42 UTC
Event first association/location: 2025.12.09-18:11:07 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI