Early-est:     Northern Molucca Sea    2026.04.02-11:35:38.46    q:B      mb:5.1*    Mwp:5.2    Mwpd:-    Td*T50Ex:0.6     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: 5.1* [36]    Mwp: 5.2 [4]    Mwpd: 5.7Xinv [3] Region: Northern Molucca Sea Origin Time: 2026.04.02-11:35:38.46 UTC Hypocenter: lat: 1.46°  lon: 126.58°  [+/-31km]    depth: 55km  [+/-41km] Location Quality: qualityCode:  B     stdErr: 1.9s   assocPhases: 77   usedPhases: 49 minDist: 1.0°   maxDist: 147.9°   AzGap: 68°   2ndAzGap: 81°   atten: -1.02 [+/-0.23] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 23km   maxHorUnc: 31km   azMaxHorUnc: 76° 68%ConfEllipsoid:   semiMajorAxisLength: 45km   majorAxisAzimuth: 105°   majorAxisPlunge: 54°   semiIntermediateAxisLength: 37km   intermediateAxisAzimuth: 236°   intermediateAxisPlunge: 25°   semiMinorAxisLength: 25km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [29]    Td: 1.5s [8]    Td*T50Ex: 0.6 [8]    To: 20.7s [26] 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:    0.6    0.6    0.6 Td*To:      31.0      31.0      31.0 Mwp magnitude:        5.2        5.2        5.2 Hypocenter depth:        55km        55km        55km 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: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 163°   dip: 38°   rake: 32° Nodal Plane 2: strike: 47°   dip: 71°   rake: 124° Quality: azimuthalGap: -1°   stationPolarityCount: 37   misfitWeightCount: 12.8   misfit: 0.18   stationDistributionRatio: 0.55   meanDistP: 36.4   meanDistT: 37.7   qualityCode: C 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): Nodal Plane 1: strike: 284°   dip: 89°   rake: -168° Nodal Plane 2: strike: 194°   dip: 78°   rake: -1° Quality: azimuthalGap: 105°   stationPolarityCount: 37   misfit: 0.31   stationDistributionRatio: 0.81   rmsAngDiffAccPref: 20.35   fracAcc30degPref: 0.94   qualityCode: B Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1775129739560
Event info last updated: 2026.04.02-12:34:00 UTC
Event first association/location: 2026.04.02-11:43:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA