Early-est:     Northern Molucca Sea    2026.04.01-09:44:28.85    q:C      mb:4.2*    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: 4.2* [6]    Mwp: - [0]    Mwpd: - [0] Region: Northern Molucca Sea Origin Time: 2026.04.01-09:44:28.85 UTC Hypocenter: lat: 2.50°  lon: 126.33°  [+/-38km]    depth: 124km  [+/-26km] Location Quality: qualityCode:  C     stdErr: 1.2s   assocPhases: 14   usedPhases: 10 minDist: 2.0°   maxDist: 144.0°   AzGap: 193°   2ndAzGap: 267°   atten: -0.76 [+/-0.73] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 19km   maxHorUnc: 38km   azMaxHorUnc: 5° 68%ConfEllipsoid:   semiMajorAxisLength: 48km   majorAxisAzimuth: 5°   majorAxisPlunge: 4°   semiIntermediateAxisLength: 28km   intermediateAxisAzimuth: 100°   intermediateAxisPlunge: 53°   semiMinorAxisLength: 21km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.5 [7]    Td: 3.2Xs [2]    Td*T50Ex: - [0]    To: 2.9s [6] Closest plate boundaries:    Sunda - Birds Head [oceanic convergent boundary]: distance: ~60km    Birds Head / Sunda [subduction zone]: distance: ~60km    Molucca Sea \ Sunda [subduction zone]: distance: ~90km    Molucca Sea \ Birds Head [subduction zone]: distance: ~90km    Molucca Sea / Sunda [subduction zone]: distance: ~260km    Philippine Sea \ Sunda [subduction zone]: distance: ~290km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (60km)  YES (60km)  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        124km        124km        124km 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: 127°   dip: 28°   rake: -69° Nodal Plane 2: strike: 284°   dip: 64°   rake: -101° Quality: azimuthalGap: -1°   stationPolarityCount: 10   misfitWeightCount: 4.1   misfit: 0.08   stationDistributionRatio: 0.34   meanDistP: 50.0   meanDistT: 52.9   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):    (No solution available) Nodal Plane 1: strike: 999°   dip: 99°   rake: 999° Nodal Plane 2: strike: 324°   dip: 13°   rake: 135° Quality: azimuthalGap: 212°   stationPolarityCount: 10   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1775036668847
Event info last updated: 2026.04.01-10:43:05 UTC
Event first association/location: 2026.04.01-09:58:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA