Early-est:     Java, Indonesia    2026.02.05-18:06:14.10    q:B      mb:5.6    Mwp:5.9*    Mwpd:-    Td*T50Ex:0.7     fmamp_polarity:./hypo.1770314774350.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1770314774350.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1770314774350.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: 5.6 [119]    Mwp: 5.9* [51]    Mwpd: 6.0Xinv [53]
Region: Java, Indonesia
Origin Time: 2026.02.05-18:06:14.10 UTC
Hypocenter: lat: -8.70°  lon: 111.25°  [+/-18km]    depth: 65km  [+/-39km]
Location Quality: qualityCode:  B     stdErr: 1.5s   assocPhases: 259   usedPhases: 170
minDist: 2.9°   maxDist: 170.3°   AzGap: 25°   2ndAzGap: 50°   atten: -1.10 [+/-0.19]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 13km   maxHorUnc: 18km   azMaxHorUnc: 45°
68%ConfEllipsoid:   semiMajorAxisLength: 40km   majorAxisAzimuth: 82°   majorAxisPlunge: 78°   semiIntermediateAxisLength: 21km   intermediateAxisAzimuth: 218°   intermediateAxisPlunge: 9°   semiMinorAxisLength: 15km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [99]    Td: 1.7s [32]    Td*T50Ex: 0.7 [32]    To: 3.8s [96]
Closest plate boundaries:
   Sunda / Australia [subduction zone]: distance: ~200km
Subduction geometry:    Zone: Sumatra-Java: DEBUG: error: [Errno 2] No such file or directory: 'gmt'    Slab depth at epicenter: error: evaluating slab depth: -999.9
Decision table (TEST!):
Event type: Subduction Zone Other Thrust/Normal Strike-slip
Compatible close plate boundary?:
 YES (200km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   0.7
   0.7
   0.7
Td*To:
     6.5
     6.5
     6.5
Mwp magnitude:
       5.9*
       5.9*
       5.9*
Hypocenter depth:
       65km
       65km
       65km
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.1770314774350.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):
Nodal Plane 1: strike: 225°   dip: 39°   rake: 41°
Nodal Plane 2: strike: 101°   dip: 66°   rake: 122°
Quality: azimuthalGap: -1°   stationPolarityCount: 119   misfitWeightCount: 30.3   misfit: 0.07   stationDistributionRatio: 0.63   meanDistP: 11.9   meanDistT: 15.6   qualityCode: A
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1770314774350.mech.fmamp_polarity.mechanism.jpg
First-motion Focal Mechanism (FMAMP_POLARITY_WAVEFORM):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 290°   dip: 29°   rake: 79°
Nodal Plane 2: strike: 123°   dip: 61°   rake: 96°
Quality: azimuthalGap: -1°   stationPolarityCount: 17   misfitWeightCount: 6.5   misfit: 0.00   stationDistributionRatio: 0.62   meanDistP: 46.0   meanDistT: 30.2   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity_waveform
./hypo.1770314774350.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):
Nodal Plane 1: strike: 251°   dip: 37°   rake: 72°
Nodal Plane 2: strike: 93°   dip: 55°   rake: 103°
Quality: azimuthalGap: 43°   stationPolarityCount: 119   misfit: 0.14   stationDistributionRatio: 0.68   rmsAngDiffAccPref: 22.61   fracAcc30degPref: 0.80   qualityCode: B
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1770314774350.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1770314774350
Event info last updated: 2026.02.05-19:05:02 UTC
Event first association/location: 2026.02.05-18:13:10 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA