Early-est:     Northern Molucca Sea    2026.04.03-01:44:16.27    q:B      mb:5.1*    Mwp:5.4    Mwpd:-    Td*T50Ex:1.1     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* [31]    Mwp: 5.4 [4]    Mwpd: 5.6Xinv [5] Region: Northern Molucca Sea Origin Time: 2026.04.03-01:44:16.27 UTC Hypocenter: lat: 1.01°  lon: 126.58°  [+/-22km]    depth: 52km  [+/-34km] Location Quality: qualityCode:  B     stdErr: 2.0s   assocPhases: 96   usedPhases: 41 minDist: 0.8°   maxDist: 151.2°   AzGap: 37°   2ndAzGap: 55°   atten: -0.98 [+/-0.26] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 18km   maxHorUnc: 22km   azMaxHorUnc: 128° 68%ConfEllipsoid:   semiMajorAxisLength: 36km   majorAxisAzimuth: 128°   majorAxisPlunge: 63°   semiIntermediateAxisLength: 25km   intermediateAxisAzimuth: 307°   intermediateAxisPlunge: 27°   semiMinorAxisLength: 22km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.4 [27]    Td: 2.4s [7]    Td*T50Ex: 1.1 [7]    To: 18.0s [27] Closest plate boundaries:    Molucca Sea \ Sunda [subduction zone]: distance: ~50km    Molucca Sea \ Birds Head [subduction zone]: distance: ~50km    Birds Head / Sunda [subduction zone]: distance: ~80km    Molucca Sea / Sunda [subduction zone]: distance: ~110km Subduction geometry: none or not available Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (50km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    1.1    1.1    1.1 Td*To:      43.2      43.2      43.2 Mwp magnitude:        5.4        5.4        5.4 Hypocenter depth:        52km        52km        52km 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: 118°   dip: 4°   rake: 149° Nodal Plane 2: strike: 239°   dip: 88°   rake: 87° Quality: azimuthalGap: -1°   stationPolarityCount: 31   misfitWeightCount: 11.8   misfit: 0.14   stationDistributionRatio: 0.57   meanDistP: 33.7   meanDistT: 46.5   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: Unreliable solution, qualityCode=C) Nodal Plane 1: strike: 252°   dip: 58°   rake: -160° Nodal Plane 2: strike: 151°   dip: 73°   rake: -34° Quality: azimuthalGap: 62°   stationPolarityCount: 31   misfit: 0.40   stationDistributionRatio: 0.71   rmsAngDiffAccPref: 30.52   fracAcc30degPref: 0.73   qualityCode: C Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1775180654625
Event info last updated: 2026.04.03-02:43:01 UTC
Event first association/location: 2026.04.03-01:49:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA