Early-est:     Banda Sea    2025.04.09-20:46:38.19    q:B      mb:4.4*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1744231595337.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1744231595337.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1744231595337.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: 4.4* [16]    Mwp: - [0]    Mwpd: - [0]
Region: Banda Sea
Origin Time: 2025.04.09-20:46:38.19 UTC
Hypocenter: lat: -7.72°  lon: 128.12°  [+/-15km]    depth: 161km  [+/-17km]
Location Quality: qualityCode:  B     stdErr: 1.2s   assocPhases: 27   usedPhases: 12
minDist: 4.3°   maxDist: 86.4°   AzGap: 73°   2ndAzGap: 145°   atten: -1.43 [+/-0.21]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 15km   azMaxHorUnc: 8°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 189°   majorAxisPlunge: 24°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 344°   intermediateAxisPlunge: 63°   semiMinorAxisLength: 16km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [14]    Td: 0.3Xs [3]    Td*T50Ex: - [0]    To: 5.6s [12]
Closest plate boundaries:
   Banda Sea - Timor [oceanic convergent boundary]: distance: ~90km
   Timor - Australia [continental transform fault]: distance: ~160km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 YES (90km)
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       161km
       161km
       161km
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.1744231595337.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 36°   dip: 56°   rake: -166°
Nodal Plane 2: strike: 298°   dip: 78°   rake: -35°
Quality: azimuthalGap: -1°   stationPolarityCount: 12   misfitWeightCount: 6.3   misfit: 0.09   stationDistributionRatio: 0.44   meanDistP: 52.7   meanDistT: 53.0   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1744231595337.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.1744231595337.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 46°   dip: 78°   rake: -133°
Nodal Plane 2: strike: 303°   dip: 44°   rake: -18°
Quality: azimuthalGap: 112°   stationPolarityCount: 12   misfit: 0.33   stationDistributionRatio: 0.69   rmsAngDiffAccPref: 43.57   fracAcc30degPref: 0.41   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1744231595337.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1744231595337
Event info last updated: 2025.04.09-21:45:01 UTC
Event first association/location: 2025.04.09-20:51:00 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA