Early-est:     Northern Molucca Sea    2026.04.03-03:37:15.16    q:B      mb:5.2    Mwp:5.8*    Mwpd:-    Td*T50Ex:1.0     fmamp_polarity:./hypo.1775187438270.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1775187438270.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1775187438270.mech.hash.thumb.jpg

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details:
Magnitude: mb: 5.2 [60]    Mwp: 5.8* [9]    Mwpd: 5.9Xinv [10]
Region: Northern Molucca Sea
Origin Time: 2026.04.03-03:37:15.16 UTC
Hypocenter: lat: 1.03°  lon: 126.44°  [+/-36km]    depth: 15km  [+/-43km]
Location Quality: qualityCode:  B     stdErr: 1.6s   assocPhases: 113   usedPhases: 76
minDist: 1.0°   maxDist: 159.0°   AzGap: 37°   2ndAzGap: 44°   atten: -1.01 [+/-0.17]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 29km   maxHorUnc: 36km   azMaxHorUnc: 114°
68%ConfEllipsoid:   semiMajorAxisLength: 48km   majorAxisAzimuth: 106°   majorAxisPlunge: 42°   semiIntermediateAxisLength: 39km   intermediateAxisAzimuth: 329°   intermediateAxisPlunge: 39°   semiMinorAxisLength: 36km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [47]    Td: 1.9s [9]    Td*T50Ex: 1.0 [9]    To: 22.2s [41]
Closest plate boundaries:
   Molucca Sea \ Sunda [subduction zone]: distance: ~30km
   Molucca Sea \ Birds Head [subduction zone]: distance: ~30km
   Birds Head / Sunda [subduction zone]: distance: ~70km
   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 (30km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   1.0
   1.0
   1.0
Td*To:
     42.2
     42.2
     42.2
Mwp magnitude:
       5.8*
       5.8*
       5.8*
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)
./hypo.1775187438270.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 161°   dip: 71°   rake: 7°
Nodal Plane 2: strike: 68°   dip: 84°   rake: 161°
Quality: azimuthalGap: -1°   stationPolarityCount: 56   misfitWeightCount: 14.7   misfit: 0.12   stationDistributionRatio: 0.42   meanDistP: 31.2   meanDistT: 42.0   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1775187438270.mech.fmamp_polarity.mechanism.jpg
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
./hypo.1775187438270.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 72°   dip: 89°   rake: 153°
Nodal Plane 2: strike: 162°   dip: 63°   rake: 1°
Quality: azimuthalGap: 84°   stationPolarityCount: 56   misfit: 0.27   stationDistributionRatio: 0.74   rmsAngDiffAccPref: 32.20   fracAcc30degPref: 0.67   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1775187438270.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1775187438270
Event info last updated: 2026.04.03-04:36:01 UTC
Event first association/location: 2026.04.03-03:42:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA