Early-est:     Kuril Islands    2025.08.02-17:20:26.03    q:B      mb:5.1*    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:./hypo.1754155229431.mech.fmamp_polarity.thumb.jpg     fmamp_polarity_waveform:./hypo.1754155229431.mech.fmamp_polarity_waveform.thumb.jpg     hash:./hypo.1754155229431.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: 5.1* [79]    Mwp: - [0]    Mwpd: - [0]
Region: Kuril Islands
Origin Time: 2025.08.02-17:20:26.03 UTC
Hypocenter: lat: 50.08°  lon: 157.53°  [+/-29km]    depth: 30km  [+/-26km]
Location Quality: qualityCode:  B     stdErr: 1.5s   assocPhases: 120   usedPhases: 89
minDist: 3.0°   maxDist: 156.7°   AzGap: 38°   2ndAzGap: 66°   atten: -0.51 [+/-0.23]
Location Uncertainty: 68%ConfEllipse:   minHorUnc: 20km   maxHorUnc: 29km   azMaxHorUnc: 155°
68%ConfEllipsoid:   semiMajorAxisLength: 37km   majorAxisAzimuth: 332°   majorAxisPlunge: 18°   semiIntermediateAxisLength: 27km   intermediateAxisAzimuth: 229°   intermediateAxisPlunge: 37°   semiMinorAxisLength: 23km
Tsunamigeneic Assesment:
Discriminants: Prob Underwater: >99%
T50Ex: 0.4 [69]    Td: 1.1Xs [1]    Td*T50Ex: - [0]    To: 24.5s [61]
Closest plate boundaries:
   Okhotsk / Pacific [subduction zone]: distance: ~70km
   North America / Pacific [subduction zone]: distance: ~720km
   Okhotsk / North America [subduction zone]: distance: ~720km
Subduction geometry:    Zone: Kamchatka/Kurils/Japan: 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 (70km)
 no
 no
Prob underwater:
 >99%
 >99%
 >99%
Td*T50Ex:
   -
   -
   -
Td*To:
     -
     -
     -
Mwp magnitude:
       -
       -
       -
Hypocenter depth:
       30km
       30km
       30km
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.1754155229431.map.jpg

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: Unreliable solution, qualityCode=C)
Nodal Plane 1: strike: 306°   dip: 6°   rake: -35°
Nodal Plane 2: strike: 70°   dip: 86°   rake: -95°
Quality: azimuthalGap: -1°   stationPolarityCount: 76   misfitWeightCount: 11.7   misfit: 0.13   stationDistributionRatio: 0.51   meanDistP: 32.1   meanDistT: 42.6   qualityCode: C
Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
./hypo.1754155229431.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.1754155229431.mech.fmamp_polarity_waveform.mechanism.jpg
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D)
Nodal Plane 1: strike: 80°   dip: 72°   rake: -119°
Nodal Plane 2: strike: 320°   dip: 33°   rake: -34°
Quality: azimuthalGap: 74°   stationPolarityCount: 76   misfit: 0.32   stationDistributionRatio: 0.71   rmsAngDiffAccPref: 33.80   fracAcc30degPref: 0.58   qualityCode: D
Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
./hypo.1754155229431.mech.hash.mechanism.jpg

Event ID: smi:alomax.net_BETA/author/ee/event/1754155229431
Event info last updated: 2025.08.02-18:19:03 UTC
Event first association/location: 2025.08.02-17:26:01 UTC
Software: Early-est 1.2.10 (2024.02.23)
Agency: alomax.net_BETA