Early-est:     Northern Molucca Sea    2026.04.02-07:04:14.02    q:B      mb:5.2*    Mwp:-    Mwpd:-    Td*T50Ex:1.5     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: 5.2* [37]    Mwp: 5.4X [1]    Mwpd: 5.7Xinv [1] Region: Northern Molucca Sea Origin Time: 2026.04.02-07:04:14.02 UTC Hypocenter: lat: 1.37°  lon: 126.58°  [+/-19km]    depth: 15km  [+/-23km] Location Quality: qualityCode:  B     stdErr: 1.7s   assocPhases: 87   usedPhases: 46 minDist: 1.0°   maxDist: 159.2°   AzGap: 45°   2ndAzGap: 59°   atten: -1.04 [+/-0.22] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 19km   azMaxHorUnc: 13° 68%ConfEllipsoid:   semiMajorAxisLength: 27km   majorAxisAzimuth: 192°   majorAxisPlunge: 43°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 36°   intermediateAxisPlunge: 44°   semiMinorAxisLength: 17km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.5 [26]    Td: 2.9s [11]    Td*T50Ex: 1.5 [11]    To: 21.0s [24] Closest plate boundaries:    Birds Head / Sunda [subduction zone]: distance: ~40km    Molucca Sea \ Sunda [subduction zone]: distance: ~40km    Molucca Sea \ Birds Head [subduction zone]: distance: ~40km    Sunda - Birds Head [oceanic convergent boundary]: distance: ~110km    Molucca Sea / Sunda [subduction zone]: distance: ~150km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (40km)  YES (110km)  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    1.5    1.5    1.5 Td*To:      60.9      60.9      60.9 Mwp magnitude:        -        -        - Hypocenter depth:        15km        15km        15km 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: 159°   dip: 21°   rake: 20° Nodal Plane 2: strike: 51°   dip: 83°   rake: 110° Quality: azimuthalGap: -1°   stationPolarityCount: 30   misfitWeightCount: 10.5   misfit: 0.16   stationDistributionRatio: 0.52   meanDistP: 30.8   meanDistT: 39.2   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):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 220°   dip: 90°   rake: -102° Nodal Plane 2: strike: 130°   dip: 12°   rake: -0° Quality: azimuthalGap: 81°   stationPolarityCount: 30   misfit: 0.29   stationDistributionRatio: 0.78   rmsAngDiffAccPref: 38.10   fracAcc30degPref: 0.41   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1775113456264
Event info last updated: 2026.04.02-08:03:04 UTC
Event first association/location: 2026.04.02-07:11:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA