Early-est:     Banda Sea    2026.02.05-15:08:34.93    q:B      mb:4.3*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1770304116122.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1770304116122.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1770304116122.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: 4.3* [11]    Mwp: - [0]    Mwpd: - [0]
Region: Banda Sea
Origin Time: 2026.02.05-15:08:34.93 UTC
Hypocenter: lat: -7.45°  lon: 128.45°  [+/-16km]    depth: 122km  [+/-18km]
Location Quality: qualityCode:  B     stdErr: 1.8s   assocPhases: 20   usedPhases: 16
minDist: 4.7°   maxDist: 151.1°   AzGap: 75°   2ndAzGap: 146°   atten: -1.66 [+/-0.27]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 16km   azMaxHorUnc: 122°
68%ConfEllipsoid:   semiMajorAxisLength: 21km   majorAxisAzimuth: 115°   majorAxisPlunge: 37°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 349°   intermediateAxisPlunge: 37°   semiMinorAxisLength: 15km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.6 [8]    Td: 0.2Xs [2]    Td*T50Ex: - [0]    To: 44.3s [8]
Closest plate boundaries:
   Banda Sea - Timor [oceanic convergent boundary]: distance: ~70km
   Timor - Australia [continental transform fault]: distance: ~180km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 YES (70km)
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       122km
       122km
       122km
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.1770304116122.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 156°   dip: 57°   rake: 18°
Nodal Plane 2: strike: 56°   dip: 75°   rake: 146°
Quality: azimuthalGap: -1°   stationPolarityCount: 11   misfitWeightCount: 7.8   misfit: 0.00   stationDistributionRatio: 0.50   meanDistP: 36.2   meanDistT: 42.4   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1770304116122.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.1770304116122.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 263°   dip: 34°   rake: 170°
Nodal Plane 2: strike: 1°   dip: 84°   rake: 56°
Quality: azimuthalGap: 145°   stationPolarityCount: 11   misfit: 0.12   stationDistributionRatio: 0.75   rmsAngDiffAccPref: 42.16   fracAcc30degPref: 0.47   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1770304116122.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1770304116122
Event info last updated: 2026.02.05-16:07:02 UTC
Event first association/location: 2026.02.05-15:17:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA