Early-est:     Halmahera, Indonesia    2025.02.03-21:35:49.42    q:A      mb:5.4    Mwp:6.0    Mwpd:-    Td*T50Ex:1.8     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: 5.4 [127]    Mwp: 6.0 [41]    Mwpd: 6.0Xinv [35] Region: Halmahera, Indonesia Origin Time: 2025.02.03-21:35:49.42 UTC Hypocenter: lat: 2.97°  lon: 128.34°  [+/-14km]    depth: 76km  [+/-31km] Location Quality: qualityCode:  A     stdErr: 0.9s   assocPhases: 234   usedPhases: 168 minDist: 4.9°   maxDist: 167.1°   AzGap: 38°   2ndAzGap: 45°   atten: -0.93 [+/-0.22] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 14km   azMaxHorUnc: 110° 68%ConfEllipsoid:   semiMajorAxisLength: 31km   majorAxisAzimuth: 85°   majorAxisPlunge: 80°   semiIntermediateAxisLength: 16km   intermediateAxisAzimuth: 301°   intermediateAxisPlunge: 8°   semiMinorAxisLength: 15km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.8 [103]    Td: 2.2s [21]    Td*T50Ex: 1.8 [21]    To: 7.5s [96] Closest plate boundaries:    Philippine Sea \ Sunda [subduction zone]: distance: ~70km    Sunda - Birds Head [continental convergent boundary]: distance: ~80km    Birds Head / Sunda [subduction zone]: distance: ~180km    Birds Head / Philippine Sea [subduction zone]: distance: ~230km    Molucca Sea \ Sunda [subduction zone]: distance: ~260km    Molucca Sea \ Birds Head [subduction zone]: distance: ~260km    Molucca Sea / Sunda [subduction zone]: distance: ~410km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (70km)  YES (80km)  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    1.8    1.8    1.8 Td*To:      16.5      16.5      16.5 Mwp magnitude:        6.0        6.0        6.0 Hypocenter depth:        76km        76km        76km Slab depth at epicenter:        n/a        -        -

First-motion Focal Mechanism (FMAMP_POLARITY): Nodal Plane 1: strike: 129°   dip: 48°   rake: 23° Nodal Plane 2: strike: 23°   dip: 74°   rake: 136° Quality: azimuthalGap: -1°   stationPolarityCount: 155   misfitWeightCount: 36.3   misfit: 0.16   stationDistributionRatio: 0.49   meanDistP: 15.8   meanDistT: 16.5   qualityCode: B Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 222°   dip: 87°   rake: -137° Nodal Plane 2: strike: 130°   dip: 48°   rake: -4° Quality: azimuthalGap: 37°   stationPolarityCount: 155   misfit: 0.23   stationDistributionRatio: 0.64   rmsAngDiffAccPref: 30.65   fracAcc30degPref: 0.74   qualityCode: C Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 15°   dip: 47°   rake: 169° Nodal Plane 2: strike: 112°   dip: 82°   rake: 44° Quality: azimuthalGap: -1°   stationPolarityCount: 56   misfitWeightCount: 12.2   misfit: 9999.90   stationDistributionRatio: 0.45   meanDistP: 33.0   meanDistT: 21.2   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_aref
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (Warning: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 23°   dip: 61°   rake: 148° Nodal Plane 2: strike: 129°   dip: 63°   rake: 33° Quality: azimuthalGap: -1°   stationPolarityCount: 38   misfitWeightCount: 6.7   misfit: 9999.90   stationDistributionRatio: 0.37   meanDistP: 42.6   meanDistT: 23.2   qualityCode: C Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_mwp

Event ID: smi:KOERI/ee/event/1738618553589
Event info last updated: 2025.02.03-22:35:55 UTC
Event first association/location: 2025.02.03-21:41:32 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI