Early-est:     Northern Molucca Sea    2026.04.02-21:52:02.83    q:C      mb:4.9*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:     fmamp_polarity_waveform:     hash:

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

Earthquake Details: Magnitude: mb: 4.9* [10]    Mwp: - [0]    Mwpd: - [0] Region: Northern Molucca Sea Origin Time: 2026.04.02-21:52:02.83 UTC Hypocenter: lat: 1.37°  lon: 126.78°  [+/-26km]    depth: 9km  [+/-60km] Location Quality: qualityCode:  C     stdErr: 1.5s   assocPhases: 17   usedPhases: 12 minDist: 0.8°   maxDist: 156.7°   AzGap: 94°   2ndAzGap: 129°   atten: -0.83 [+/-0.35] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 20km   maxHorUnc: 26km   azMaxHorUnc: 31° 68%ConfEllipsoid:   semiMajorAxisLength: 64km   majorAxisAzimuth: 201°   majorAxisPlunge: 70°   semiIntermediateAxisLength: 27km   intermediateAxisAzimuth: 65°   intermediateAxisPlunge: 15°   semiMinorAxisLength: 24km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.3X [3]    Td: 1.0Xs [1]    Td*T50Ex: - [0]    To: 5.4Xs [3] Closest plate boundaries:    Birds Head / Sunda [subduction zone]: distance: ~50km    Molucca Sea \ Sunda [subduction zone]: distance: ~50km    Molucca Sea \ Birds Head [subduction zone]: distance: ~50km    Sunda - Birds Head [oceanic convergent boundary]: distance: ~110km    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 (50km)  YES (110km)  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        9km        9km        9km Slab depth at epicenter:        n/a        -        - Tsunami and Rupture predictions (TEST!): No prediction: Event too small (Mwp<7.0) or too few Mwp readings (N<20)

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 90°   dip: 36°   rake: 134° Nodal Plane 2: strike: 220°   dip: 65°   rake: 64° Quality: azimuthalGap: -1°   stationPolarityCount: 9   misfitWeightCount: 3.8   misfit: 0.00   stationDistributionRatio: 0.38   meanDistP: 49.3   meanDistT: 50.6   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (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/_polarity_waveform
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 164°   dip: 42°   rake: 91° Nodal Plane 2: strike: 343°   dip: 48°   rake: 89° Quality: azimuthalGap: 129°   stationPolarityCount: 8   misfit: 0.32   stationDistributionRatio: 0.79   rmsAngDiffAccPref: 45.08   fracAcc30degPref: 0.31   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1775166718575
Event info last updated: 2026.04.02-22:51:01 UTC
Event first association/location: 2026.04.02-22:07:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA