Early-est:     Southeast of Ryukyu Islands    2025.08.03-05:23:12.10    q:C      mb:4.2*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1754198591772.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754198591772.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754198591772.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: 4.2* [4]    Mwp: 3.9X [1]    Mwpd: - [0]
Region: Southeast of Ryukyu Islands
Origin Time: 2025.08.03-05:23:12.10 UTC
Hypocenter: lat: 25.92°  lon: 129.08°  [+/-19km]    depth: 15km  [+/-26km]
Location Quality: qualityCode:  C     stdErr: 1.3s   assocPhases: 9   usedPhases: 8
minDist: 1.2°   maxDist: 47.9°   AzGap: 99°   2ndAzGap: 164°   atten: 0.22 [+/-0.97]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 15km   maxHorUnc: 19km   azMaxHorUnc: 3°
68%ConfEllipsoid:   semiMajorAxisLength: 28km   majorAxisAzimuth: 351°   majorAxisPlunge: 53°   semiIntermediateAxisLength: 21km   intermediateAxisAzimuth: 207°   intermediateAxisPlunge: 31°   semiMinorAxisLength: 18km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.5 [5]    Td: -s [0]    Td*T50Ex: - [0]    To: 22.6s [5]
Closest plate boundaries:
   Okinawa / Philippine Sea [subduction zone]: distance: ~10km
Subduction geometry:    Zone: Ryukyu: 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 (10km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
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.1754198591772.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (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
./hypo.1754198591772.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.1754198591772.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: 45°   stationPolarityCount: 4   misfit: 0.99   stationDistributionRatio: 0.69   rmsAngDiffAccPref: 40.29   fracAcc30degPref: 0.00   qualityCode: F
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754198591772.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754198591772
Event info last updated: 2025.08.03-06:22:05 UTC
Event first association/location: 2025.08.03-05:26:02 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA