Early-est:     Aru Islands Region, Indonesia    2026.02.14-09:48:18.14    q:C      mb:4.6*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1771062498406.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1771062498406.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1771062498406.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: 4.6* [13]    Mwp: - [0]    Mwpd: - [0]
Region: Aru Islands Region, Indonesia
Origin Time: 2026.02.14-09:48:18.14 UTC
Hypocenter: lat: -5.13°  lon: 134.14°  [+/-23km]    depth: 5km  [+/-19km]
Location Quality: qualityCode:  C     stdErr: 1.3s   assocPhases: 43   usedPhases: 9
minDist: 2.9°   maxDist: 149.3°   AzGap: 129°   2ndAzGap: 153°   atten: -1.62 [+/-0.35]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 23km   azMaxHorUnc: 75°
68%ConfEllipsoid:   semiMajorAxisLength: 30km   majorAxisAzimuth: 76°   majorAxisPlunge: 17°   semiIntermediateAxisLength: 18km   intermediateAxisAzimuth: 193°   intermediateAxisPlunge: 56°   semiMinorAxisLength: 15km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [10]    Td: 0.3Xs [2]    Td*T50Ex: - [0]    To: 12.5s [10]
Closest plate boundaries:
   Birds Head - Banda Sea [oceanic convergent boundary]: distance: ~40km
   Banda Sea - Australia [continental rift boundary]: distance: ~40km
   Australia - Birds Head [continental rift boundary]: distance: ~40km
   Australia - Maoke [continental transform fault]: distance: ~130km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 YES (40km)
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       5km
       5km
       5km
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.1771062498406.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 54°   dip: 35°   rake: 91°
Nodal Plane 2: strike: 232°   dip: 55°   rake: 89°
Quality: azimuthalGap: -1°   stationPolarityCount: 11   misfitWeightCount: 5.0   misfit: 0.12   stationDistributionRatio: 0.48   meanDistP: 50.8   meanDistT: 47.1   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1771062498406.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.1771062498406.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 208°   dip: 40°   rake: 115°
Nodal Plane 2: strike: 357°   dip: 55°   rake: 71°
Quality: azimuthalGap: 128°   stationPolarityCount: 10   misfit: 0.22   stationDistributionRatio: 0.80   rmsAngDiffAccPref: 44.01   fracAcc30degPref: 0.38   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1771062498406.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1771062498406
Event info last updated: 2026.02.14-10:47:01 UTC
Event first association/location: 2026.02.14-09:53:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA