Early-est:     Northern Molucca Sea    2026.04.02-05:37:29.37    q:B      mb:5.0*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1775108253188.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1775108253188.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1775108253188.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: 5.0* [18]    Mwp: - [0]    Mwpd: - [0]
Region: Northern Molucca Sea
Origin Time: 2026.04.02-05:37:29.37 UTC
Hypocenter: lat: 1.12°  lon: 126.89°  [+/-13km]    depth: 80km  [+/-13km]
Location Quality: qualityCode:  B     stdErr: 2.6s   assocPhases: 51   usedPhases: 26
minDist: 0.6°   maxDist: 158.8°   AzGap: 56°   2ndAzGap: 98°   atten: -0.92 [+/-0.33]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 10km   maxHorUnc: 13km   azMaxHorUnc: 107°
68%ConfEllipsoid:   semiMajorAxisLength: 16km   majorAxisAzimuth: 290°   majorAxisPlunge: 10°   semiIntermediateAxisLength: 14km   intermediateAxisAzimuth: 32°   intermediateAxisPlunge: 51°   semiMinorAxisLength: 11km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [16]    Td: 1.8Xs [3]    Td*T50Ex: - [0]    To: 23.5s [15]
Closest plate boundaries:
   Birds Head / Sunda [subduction zone]: distance: ~80km
   Molucca Sea \ Sunda [subduction zone]: distance: ~80km
   Molucca Sea \ Birds Head [subduction zone]: distance: ~80km
   Sunda - Birds Head [oceanic convergent boundary]: distance: ~140km
   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 (80km)
 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)
./hypo.1775108253188.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 1°   dip: 40°   rake: 51°
Nodal Plane 2: strike: 228°   dip: 60°   rake: 118°
Quality: azimuthalGap: -1°   stationPolarityCount: 22   misfitWeightCount: 11.3   misfit: 0.02   stationDistributionRatio: 0.54   meanDistP: 46.4   meanDistT: 39.4   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1775108253188.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.1775108253188.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 219°   dip: 59°   rake: 138°
Nodal Plane 2: strike: 334°   dip: 55°   rake: 39°
Quality: azimuthalGap: 88°   stationPolarityCount: 22   misfit: 0.17   stationDistributionRatio: 0.68   rmsAngDiffAccPref: 14.47   fracAcc30degPref: 0.98   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1775108253188.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1775108253188
Event info last updated: 2026.04.02-06:36:00 UTC
Event first association/location: 2026.04.02-05:44:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA