Early-est:     Northern Molucca Sea    2026.04.04-02:53:14.03    q:C      mb:4.8*    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: 4.8* [11]    Mwp: 4.5X [1]    Mwpd: - [0] Region: Northern Molucca Sea Origin Time: 2026.04.04-02:53:14.03 UTC Hypocenter: lat: 1.17°  lon: 126.22°  [+/-18km]    depth: 80km  [+/-18km] Location Quality: qualityCode:  C     stdErr: 1.9s   assocPhases: 29   usedPhases: 15 minDist: 1.2°   maxDist: 147.8°   AzGap: 141°   2ndAzGap: 156°   atten: -1.21 [+/-0.42] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 14km   maxHorUnc: 18km   azMaxHorUnc: 63° 68%ConfEllipsoid:   semiMajorAxisLength: 23km   majorAxisAzimuth: 66°   majorAxisPlunge: 14°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 172°   intermediateAxisPlunge: 47°   semiMinorAxisLength: 16km Tsunamigeneic Assesment: Discriminants: Prob Underwater: >99% T50Ex: 0.6 [10]    Td: 1.3Xs [1]    Td*T50Ex: - [0]    To: 21.3s [10] Closest plate boundaries:    Molucca Sea \ Sunda [subduction zone]: distance: ~20km    Molucca Sea \ Birds Head [subduction zone]: distance: ~20km    Birds Head / Sunda [subduction zone]: distance: ~60km    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 (20km)  no  no Prob underwater:  >99%  >99%  >99% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        80km        80km        80km 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: 155°   dip: 44°   rake: 31° Nodal Plane 2: strike: 41°   dip: 69°   rake: 129° Quality: azimuthalGap: -1°   stationPolarityCount: 12   misfitWeightCount: 5.5   misfit: 0.06   stationDistributionRatio: 0.46   meanDistP: 49.7   meanDistT: 43.0   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: 316°   dip: 25°   rake: 135° Nodal Plane 2: strike: 88°   dip: 72°   rake: 71° Quality: azimuthalGap: 88°   stationPolarityCount: 12   misfit: 0.33   stationDistributionRatio: 0.71   rmsAngDiffAccPref: 43.99   fracAcc30degPref: 0.35   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2

Event ID: smi:alomax.net_BETA/author/ee/event/1775271206808
Event info last updated: 2026.04.04-03:52:00 UTC
Event first association/location: 2026.04.04-03:01:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA