Early-est:     Halmahera, Indonesia    2025.02.02-20:07:43.70    q:B      mb:4.6    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: 4.6 [19]    Mwp: - [0]    Mwpd: - [0] Region: Halmahera, Indonesia Origin Time: 2025.02.02-20:07:43.70 UTC Hypocenter: lat: 0.89°  lon: 127.48°  [+/-15km]    depth: 148km  [+/-22km] Location Quality: qualityCode:  B     stdErr: 0.8s   assocPhases: 54   usedPhases: 20 minDist: 9.7°   maxDist: 159.5°   AzGap: 108°   2ndAzGap: 187°   atten: -1.46 [+/-0.29] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 15km   azMaxHorUnc: 10° 68%ConfEllipsoid:   semiMajorAxisLength: 24km   majorAxisAzimuth: 156°   majorAxisPlunge: 59°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 45°   intermediateAxisPlunge: 12°   semiMinorAxisLength: 14km Tsunamigeneic Assesment: Discriminants: Prob Underwater: 96% T50Ex: 0.4 [11]    Td: -s [0]    Td*T50Ex: - [0]    To: 1.1s [8] Closest plate boundaries:    Sunda - Birds Head [continental transform fault]: distance: ~140km    Birds Head / Sunda [subduction zone]: distance: ~150km    Molucca Sea \ Sunda [subduction zone]: distance: ~150km    Molucca Sea \ Birds Head [subduction zone]: distance: ~150km    Molucca Sea / Sunda [subduction zone]: distance: ~190km    Philippine Sea \ Sunda [subduction zone]: distance: ~190km    Birds Head / Philippine Sea [subduction zone]: distance: ~190km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (150km)  no  no Prob underwater:  96%  96%  96% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        148km        148km        148km Slab depth at epicenter:        n/a        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 176°   dip: 18°   rake: 27° Nodal Plane 2: strike: 61°   dip: 82°   rake: 106° Quality: azimuthalGap: -1°   stationPolarityCount: 18   misfitWeightCount: 5.7   misfit: 0.12   stationDistributionRatio: 0.35   meanDistP: 41.4   meanDistT: 43.5   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: 121°   dip: 79°   rake: 141° Nodal Plane 2: strike: 220°   dip: 52°   rake: 15° Quality: azimuthalGap: 106°   stationPolarityCount: 18   misfit: 0.43   stationDistributionRatio: 0.81   rmsAngDiffAccPref: 42.49   fracAcc30degPref: 0.45   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/1738526867540
Event info last updated: 2025.02.02-21:08:03 UTC
Event first association/location: 2025.02.02-20:15:03 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI