Early-est:     Timor Region    2026.06.18-07:26:45.55    q:B      mb:4.7*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1781767605924.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1781767605924.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1781767605924.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: 4.7* [10]    Mwp: 4.9X [3]    Mwpd: 5.1Xinv [1]
Region: Timor Region
Origin Time: 2026.06.18-07:26:45.55 UTC
Hypocenter: lat: -8.95°  lon: 126.42°  [+/-15km]    depth: 15km  [+/-17km]
Location Quality: qualityCode:  B     stdErr: 1.5s   assocPhases: 21   usedPhases: 15
minDist: 2.3°   maxDist: 150.9°   AzGap: 74°   2ndAzGap: 110°   atten: -1.39 [+/-0.31]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 12km   maxHorUnc: 15km   azMaxHorUnc: 163°
68%ConfEllipsoid:   semiMajorAxisLength: 19km   majorAxisAzimuth: 335°   majorAxisPlunge: 26°   semiIntermediateAxisLength: 17km   intermediateAxisAzimuth: 212°   intermediateAxisPlunge: 48°   semiMinorAxisLength: 14km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: 79%
T50Ex: 0.4 [8]    Td: 1.7Xs [1]    Td*T50Ex: - [0]    To: 19.6s [7]
Closest plate boundaries:
   Timor - Australia [oceanic transform fault]: distance: ~70km
   Banda Sea - Timor [oceanic convergent boundary]: 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
 no
 YES (70km)
Prob underwater:
 79%
 79%
 79%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       15km
       15km
       15km
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.1781767605924.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 129°   dip: 62°   rake: 179°
Nodal Plane 2: strike: 219°   dip: 89°   rake: 28°
Quality: azimuthalGap: -1°   stationPolarityCount: 14   misfitWeightCount: 6.2   misfit: 0.04   stationDistributionRatio: 0.37   meanDistP: 51.6   meanDistT: 50.3   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1781767605924.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.1781767605924.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 138°   dip: 69°   rake: -173°
Nodal Plane 2: strike: 46°   dip: 84°   rake: -21°
Quality: azimuthalGap: 73°   stationPolarityCount: 14   misfit: 0.26   stationDistributionRatio: 0.69   rmsAngDiffAccPref: 31.78   fracAcc30degPref: 0.77   qualityCode: C
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1781767605924.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1781767605924
Event info last updated: 2026.06.18-08:25:00 UTC
Event first association/location: 2026.06.18-07:31:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA