Early-est:     Irian Jaya, Indonesia    2026.03.26-22:51:03.71    q:B      mb:5.3    Mwp:5.8*    Mwpd:-    Td*T50Ex:1.6     fmamp_polarity:./hypo.1774565464501.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1774565464501.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1774565464501.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: 5.3 [60]    Mwp: 5.8* [19]    Mwpd: 6.0Xinv [18]
Region: Irian Jaya, Indonesia
Origin Time: 2026.03.26-22:51:03.71 UTC
Hypocenter: lat: -3.38°  lon: 139.31°  [+/-13km]    depth: 68km  [+/-28km]
Location Quality: qualityCode:  B     stdErr: 1.5s   assocPhases: 96   usedPhases: 59
minDist: 7.1°   maxDist: 146.5°   AzGap: 88°   2ndAzGap: 121°   atten: -1.31 [+/-0.19]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 8km   maxHorUnc: 13km   azMaxHorUnc: 40°
68%ConfEllipsoid:   semiMajorAxisLength: 29km   majorAxisAzimuth: 232°   majorAxisPlunge: 69°   semiIntermediateAxisLength: 14km   intermediateAxisAzimuth: 25°   intermediateAxisPlunge: 19°   semiMinorAxisLength: 10km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: <1%
T50Ex: 0.7 [49]    Td: 2.3s [16]    Td*T50Ex: 1.6 [16]    To: 39.2s [49]
Closest plate boundaries:
   Woodlark - Maoke [continental convergent boundary]: distance: ~60km
   Australia - Maoke [continental transform fault]: distance: ~140km
Subduction geometry: none or not available
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 no
 YES (60km)
 no
Prob underwater:
 <1%
 <1%
 <1%
Td*T50Ex:
   1.6
   1.6
   1.6
Td*To:
     90.2
     90.2
     90.2
Mwp magnitude:
       5.8*
       5.8*
       5.8*
Hypocenter depth:
       68km
       68km
       68km
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.1774565464501.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):
Nodal Plane 1: strike: 64°   dip: 80°   rake: 9°
Nodal Plane 2: strike: 333°   dip: 81°   rake: 170°
Quality: azimuthalGap: -1°   stationPolarityCount: 52   misfitWeightCount: 20.9   misfit: 0.07   stationDistributionRatio: 0.53   meanDistP: 20.4   meanDistT: 26.2   qualityCode: B
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1774565464501.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.1774565464501.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 336°   dip: 87°   rake: 173°
Nodal Plane 2: strike: 66°   dip: 83°   rake: 3°
Quality: azimuthalGap: 88°   stationPolarityCount: 52   misfit: 0.11   stationDistributionRatio: 0.67   rmsAngDiffAccPref: 8.00   fracAcc30degPref: 1.00   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1774565464501.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1774565464501
Event info last updated: 2026.03.26-23:50:00 UTC
Event first association/location: 2026.03.26-22:56:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA