Early-est:     Irian Jaya Region, Indonesia    2026.02.11-18:34:12.81    q:C      mb:4.5*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1770834856821.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1770834856821.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1770834856821.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: 4.5* [7]    Mwp: - [0]    Mwpd: - [0]
Region: Irian Jaya Region, Indonesia
Origin Time: 2026.02.11-18:34:12.81 UTC
Hypocenter: lat: -4.73°  lon: 134.26°  [+/-23km]    depth: 9km  [+/-25km]
Location Quality: qualityCode:  C     stdErr: 4.4s   assocPhases: 15   usedPhases: 9
minDist: 2.7°   maxDist: 26.7°   AzGap: 185°   2ndAzGap: 254°   atten: -1.80 [+/-0.90]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 15km   maxHorUnc: 23km   azMaxHorUnc: 63°
68%ConfEllipsoid:   semiMajorAxisLength: 29km   majorAxisAzimuth: 248°   majorAxisPlunge: 14°   semiIntermediateAxisLength: 26km   intermediateAxisAzimuth: 4°   intermediateAxisPlunge: 60°   semiMinorAxisLength: 17km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.6 [9]    Td: 0.3Xs [1]    Td*T50Ex: - [0]    To: 30.1s [8]
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: ~90km
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:
       9km
       9km
       9km
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.1770834856821.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 141°   dip: 8°   rake: -160°
Nodal Plane 2: strike: 31°   dip: 87°   rake: -82°
Quality: azimuthalGap: -1°   stationPolarityCount: 10   misfitWeightCount: 2.4   misfit: 0.01   stationDistributionRatio: 0.42   meanDistP: 50.7   meanDistT: 52.2   qualityCode: D
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1770834856821.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.1770834856821.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (No solution available)
Nodal Plane 1: strike: 999°   dip: 99°   rake: 999°
Nodal Plane 2: strike: 324°   dip: 13°   rake: 135°
Quality: azimuthalGap: 261°   stationPolarityCount: 9   misfit: 0.99   stationDistributionRatio: 0.00   rmsAngDiffAccPref: 0.00   fracAcc30degPref: 0.00   qualityCode: E
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1770834856821.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1770834856821
Event info last updated: 2026.02.11-19:33:00 UTC
Event first association/location: 2026.02.11-18:39:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA