Early-est:     Banda Sea    2026.03.30-04:00:22.65    q:A      mb:4.9*    Mwp:-    Mwpd:-    Td*T50Ex:0.2     fmamp_polarity:./hypo.1774843223176.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1774843223176.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1774843223176.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: 4.9* [26]    Mwp: 4.9X [1]    Mwpd: 5.3Xinv [1]
Region: Banda Sea
Origin Time: 2026.03.30-04:00:22.65 UTC
Hypocenter: lat: -7.47°  lon: 128.67°  [+/-7km]    depth: 131km  [+/-9km]
Location Quality: qualityCode:  A     stdErr: 1.3s   assocPhases: 56   usedPhases: 34
minDist: 4.9°   maxDist: 148.0°   AzGap: 77°   2ndAzGap: 146°   atten: -1.60 [+/-0.19]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 6km   maxHorUnc: 7km   azMaxHorUnc: 3°
68%ConfEllipsoid:   semiMajorAxisLength: 9km   majorAxisAzimuth: 6°   majorAxisPlunge: 41°   semiIntermediateAxisLength: 9km   intermediateAxisAzimuth: 172°   intermediateAxisPlunge: 48°   semiMinorAxisLength: 8km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.6 [17]    Td: 0.4s [5]    Td*T50Ex: 0.2 [5]    To: 2.8s [17]
Closest plate boundaries:
   Banda Sea - Timor [oceanic convergent boundary]: distance: ~80km
   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 (80km)
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   0.2
   0.2
   0.2
Td*To:
     1.1
     1.1
     1.1
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       131km
       131km
       131km
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.1774843223176.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 101°   dip: 14°   rake: -15°
Nodal Plane 2: strike: 206°   dip: 86°   rake: -104°
Quality: azimuthalGap: -1°   stationPolarityCount: 25   misfitWeightCount: 12.9   misfit: 0.17   stationDistributionRatio: 0.49   meanDistP: 52.0   meanDistT: 41.4   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1774843223176.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.1774843223176.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 355°   dip: 52°   rake: 179°
Nodal Plane 2: strike: 85°   dip: 90°   rake: 38°
Quality: azimuthalGap: 92°   stationPolarityCount: 25   misfit: 0.27   stationDistributionRatio: 0.71   rmsAngDiffAccPref: 34.09   fracAcc30degPref: 0.70   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1774843223176.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1774843223176
Event info last updated: 2026.03.30-04:59:03 UTC
Event first association/location: 2026.03.30-04:03:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA